915 PRODUCTION PLANTS

From MDOT Policy Manual
Jump to: navigation, search
915.01 GENERAL.
These specifications are applicable to all batching and proportioning plants.
915.01.01 Approval. The plant from which the ContractorAny person having a Contract with a procurement agency. Contractor does not include an employee with an employment Contract, or an employee organization with a collective bargaining agreement. proposes to obtain material shall be approved by the Office of Materials Technology (OMT) before starting deliveries.
915.01.02 Lead Time. Notify OMT at least two working days prior to the start of operations. OMT shall be kept informed of plant operational procedures and be notified when a change is planned. Inspectors shall have safe access to all areas of the plant for the performance of their duties. All equipment, tools, machinery, and parts of the plant shall be maintained in a satisfactory working condition at all times.
915.01.03 Storage. The storage and handling of aggregates in stockpiles and bins shall be done in a manner that will prevent segregation, intermingling, and contamination by foreign material or equipment. Bins discharging to feeder systems shall be equipped with accessible calibrated devices to vary the quantity of material being fed.
915.01.04 Measuring Devices. Measuring devices shall meet the current edition of the National Institute of StandardsThe official Standards for Highway and Incidental Structures, maintained on the Administration website. The latest incorporated revisions issued on or before the date of advertisement of the Contract. and Technology Handbook 44, except as modified by Table 915. The producer shall provide all personnel and equipment for calibrating measuring devices.
Before the plant starts any proportioning operation, and at least once each year thereafter, all measuring devices, meters, dispensers, test weights, and other measuring devices shall be inspected, tested, and certified to be in proper operating condition by an approved testing agency. During the period of operation, all measuring devices, meters, dispensers, and other measuring devices shall be tested monthly and certified for accuracy and operating condition by the producer or an approved testing agency. Any weighing device by which materials are sold by weight as a basis of payment shall be tested monthly and certified by an approved testing agency. The EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. shall be notified at least two working days in advance of monthly scale inspections. The certifications shall state capacities, minimum graduations, loads applied, degree of accuracy, and magnitude.
Balance and zero conditions of scales shall be checked daily, and at any other time requested by OMT. The EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. may, at any time, direct that any measuring device be tested by the producer or an outside agency if there is any doubt about the accuracy of the measuring device. Certificates of inspection shall be posted in a prominent place in the plant, and a copy shall be promptly submitted to the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
Production plant tolerances shall meet the following table:
TABLE 915
MATERIAL *MAINTENANCE TOLERANCE UNIT OF MEASURE
Aggregate 0.2% Weight
Portland Cement or Blended Hydraulic Cement of Ground Iron Blast Furnace Slag or Fly Ash 0.2% Weight
Asphalt 0.2% Weight or Volume
Water 1.5% Weight or Volume
Additives 0.5% Weight or Volume
∗Maintenance tolerance shall be the specified percent of the total capacity of the scale or the smallest scale graduation, whichever is greater.
If during the monthly check, the measuring devices are found to deviate from the allowable tolerance, they will be suspended from use until recalibrated to the SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a requirements. A price adjustment will apply to materials sold and accepted by weight that are supplied during the measuring device malfunction period when the malfunction resulted in an overpayment. The measuring device malfunction period is defined as the elapsed time between the two successive monthly checks.
915.01.05 Sampling EquipmentAll machinery, tools, and apparatus necessary for the proper construction and acceptable completion of the work, together with the necessary supplies for upkeep and maintenance.. The producer shall provide all personnel and equipment for obtaining samples.
(a) Refer to M156 and D140. Sample liquid binder from a tap located at the last practical and safe point between the binder control unit and the plant.
(b) Sample and split asphalt mixes per R47.
(c) Sample and process aggregate per T2.
915.01.06 Quality Control LaboratoryThe testing laboratory of the State Highway Administration (or other Administrations) or any other testing laboratory designated by the procurement officer.. The producer shall provide an AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.-approved laboratory at proportioning or batching plants suitable for conducting the various tests required. An off-site laboratory may be used with AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. approval. Approval of the QC laboratory and testing personnel will be subject to periodic inspection. Correct any deficiencies to the satisfaction of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. or approval will be withdrawn.
915.02 ASPHALT PLANTS.
M156. Asphalt plants shall be equipped with Automatic Batching and Recording of Batching except as modified in 915.01 and the following:
(a) Dryer. Dry the aggregates per the plant manufacturer’s recommendations.
(b) Hot Aggregate Bins. M 156.
(c) Mixer Unit for Batch Method. Minimum dry and wet mixing times shall be 5 and 15 seconds, respectively.
(d) Truck Scales. Per the National Institute for StandardsThe official Standards for Highway and Incidental Structures, maintained on the Administration website. The latest incorporated revisions issued on or before the date of advertisement of the Contract. and Technology (NIST).
(e) Delivery Records and Tickets.
(1) Maintain a delivery record showing the Contract number, truck identification (ID) number, identification of the type of mix being produced, number of truck loads, and total tons of mix.
(2) Use an approved plant automatic weighing and printing system. Provide a printed delivery ticket for each load with the cumulative total weight of mix in each truck.
Delivery tickets for each load shall also contain the truck ID number, Contract number, identification of the type of mix, date, time loaded, gross and tare weights, and net weight of the mix.
(3) Record the temperature of the mix on the delivery ticket when requested. The temperature may be handwritten.
(f) Hauling Units.
(1) Transport the mix to the work site in units cleaned of all foreign material. Treat the inside surface of all hauling units with an approved asphalt release agent that will not contaminate the mix nor alter its characteristics. The use of petroleum derivatives is prohibited.
(2) Cover the contents of each load with suitable material of sufficient size to completely protect it from the weather. Each unit shall have convenient access from ground level to insert thermometers to determine mix temperature.
(g) Drum Mixer Plants.
(1) Refer to MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 453 for calibration approval.
(2) Provide a monitoring station for the purpose of controlling the entire operation. If any part of the control system fails, an alternative control system may be used for a maximum of two working days.
(3) Determine the moisture content of all aggregates per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 251.
915.02.01 Certified Asphalt Plant. The producer is responsible for quality control of plant operations to ensure that the material meets specifications. The quality control process will be subject to unannounced periodic inspection when project production is in progress. The plant’s certified technician shall fully participate in the inspections.
Initial Inspection. Plants initially setting up and starting production will be subject to a comprehensive inspection to determine whether the plant equipment and personnel meet all applicable specifications. CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. by a professional engineer registered in the State of Maryland that the plant facilities meet as specified will be accepted. Final acceptance will be as determined.
915.02.02 Responsibilities of the Asphalt Producer.
Notification. Notify the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. one working day prior to producing materials for AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. projects. Report total tons shipped one business day after completed daily shipments. Send report to Superpave@sha.state.md.
Quality Control (QC). Refer to 504.03. Perform additional sampling and testing when directed. Provide the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. with the opportunity to witness all sampling and testing. Report QC test results within 24 hours of production.
Reports. Furnish test results on AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.-approved documents. Retain all original QC source documents for five years.
915.02.03 Responsibilities of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
Technician CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore.. Conducted per the Mid-Atlantic Region Technician CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. Program (MARTCP) and the Maryland Technician CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. Program.
Independent Assurance Audits (IAA). The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will evaluate the equipment and the proficiency of QC technicians through audits performed on a random basis. The QC technician shall cooperate with the IAA technician in the evaluations.
Split Samples to Evaluate the Effectiveness of the Plant Quality Control Operation. Take a mix sample at the plant or project and split per R47. Sample a minimum of once per ten days of production and when daily production exceeds 200 tons. Provide one of the split samples to the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. for testing. Test the other split sample per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 735 and submit the results within 72 hours. Approval may be withdrawn if split sample data is not submitted as specified.
(a) Effective Plant Quality Control Operations. Plant QC operations will be evaluated as effective when both split sample results compare within AASHTOAmerican Association of State Highway and Transportation Officials Acceptable Range of Two Test Results, Multi-LaboratoryThe testing laboratory of the State Highway Administration (or other Administrations) or any other testing laboratory designated by the procurement officer. Precision parameters for binder content, percent passing the 4.75mm, 2.36 mm, 0.075mm gradation sieves, and maximum specific gravity (Gmm).
After three consecutive split samples compare within the AASHTOAmerican Association of State Highway and Transportation Officials parameters and have been evaluated, the split sample frequency may be decreased to a minimum of once every 15 days of production.
(b) Ineffective Plant Quality Control Operations. When two consecutive QC and AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. split samples do not compare, a three-way split will be taken and evaluated. If the results of the three-way split compare, the QC Lab will be considered effective and monitored. If the three-way split evaluation does not compare for all the indicated tests, the QC operation will be evaluated by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. and approval may be withdrawn if equipment or procedural deficiencies are determined to exist.
Recertification of Plant QC LaboratoryThe testing laboratory of the State Highway Administration (or other Administrations) or any other testing laboratory designated by the procurement officer.. Documentation of corrective action shall be submitted by the QC Plan AdministratorThe chief executive officer of an Administration.. A comprehensive inspection will be conducted to recertify the plant once the documentation is approved.
Dispute Resolution. Following is a general procedure to resolve conflicts resulting from discrepancies between test results from the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. and producer, and non-test related disputes of sufficient magnitude to impact payment.
(a) When a dispute arises, the producer or EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. will file a written complaint to the Chief EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. describing the nature of the dispute along with the pertinent information.
(b) The Chief EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. will appoint a panel of three members to resolve the conflict. The panel will include a member selected by the asphalt industry.
(c) The panel will make recommendations to the Chief EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
(d) The Chief EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. will decide the disposition of the dispute based on the panel’s recommendations.
(e) A written report from the panel describing all subsequent actions and final disposition of the dispute shall be included in the project records.
(f) If subsequent disputes arise on the same issue, the written report will be included as a resource during the resolution process.
915.03 PORTLAND CEMENT CONCRETE PLANTS.
M 157, except as modified herein, including the applicable requirements of 915.01.
915.03.01 Storage of Aggregate. Coarse and fine aggregate for use in portland cement concrete shall be maintained at a uniform moisture content in excess of its saturated surface dry condition. Water added for this purpose shall meet 921.01.
915.03.02 Temperature of Water and Cement. The plant shall be equipped with approved methods of heating and cooling the mix. The temperature of the plastic concrete shall meet 902.10.03. The temperature of the cementitious materials and the mixing water at the time they are used in the mix shall not exceed 170 F.
915.03.03 Load Tickets. An AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. approved computer generated batch ticket indicating the pertinent information per M 157 shall be provided in duplicate for each load. The ticket shall indicate maximum allowable water, and maximum water allowed for jobsite slump adjustment. Distribution shall be made as specified in 915.03.05 (c)(2). The producer’s copy shall be readily available for inspection upon request by the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him.. A completed AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. Form 116 shall be issued for each load in the event a computer generated batch ticket cannot be provided.
915.03.04 Mixers and Agitators. The requirements for mixers and agitators and for mixing and delivery of ready mixed concrete shall conform to M 157 with the following exceptions:
(a) During transit, operate drums at agitating speed only. Mixing during transit is prohibited.
(1) At least 85 percent of design water requirement shall be added at the plant through the certified plant water meter.
(2) Water for slump adjustment may be added at the plant through the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. approved truck water system under the supervision of the certified concrete technician, provided the maximum specified water/cement ratio is not exceeded.
(3) A maximum of 3 gal of water per cubic yard of concrete may be added at the job site provided the maximum specified water/cement ratio is not exceeded.
(4) Adding water after partial discharge of the load is prohibited.
(b) Loading of mixers or agitators that contain wash water in the drum is prohibited.
(c) When the concrete is specified or permitted to be made by volumetric batching and continuous mixing, the batching and mixing unit shall meet C 685. Calibration shall meet MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 558.
Where no mixer performance tests are made for stationary mixers, the minimum mixing time is 75 seconds.
Initial Inspection. Any plant initially setting up and starting production will be subject to a comprehensive inspection to determine whether the plant equipment and personnel meet all applicable SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a requirements. The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will accept certification, by a professional engineer registered in the State of Maryland, that the plant facilities meet all applicable SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a requirements. However, final acceptance will be determined by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
Responsibilities of the Concrete Producer.
(a) Notification. Notify OMT one working day prior to producing materials for AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. projects.
(b) Quality Control. Have the certified concrete plant technician present while concrete is being batched and delivered to the project. This technician shall supervise concrete production.
(1) Develop and use an acceptable Quality Control Plan that addresses all elements necessary for quality control in the plants.
(2) Control tests shall be performed by the certified concrete plant technician. This technician shall perform moisture tests, adjust proportions of aggregate for free moisture, complete and sign batch or approved delivery tickets, and ensure quality control of the batching operations.
(3) Technician certification will be awarded upon satisfactory completion of examinations administered by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 560.
(4) Supply all necessary test equipment.
(5) Sample frequency shall meet the MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) Frequency Guide, Table 1.
(c) Reports. The following reports shall be processed by the producer:
(1) AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. Form 113, daily, stating that the material was sampled and tested in accordance with the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.’s sampling and testing guidelines and complies with the applicable Specifications. Make a distribution to the producer’s file and AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.’s LaboratoryThe testing laboratory of the State Highway Administration (or other Administrations) or any other testing laboratory designated by the procurement officer..
(2) AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. Form 116, for each load. Make a distribution to the project file and producer’s file.
(3) AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. Forms for all concrete materials sampled at the plant per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) Frequency Guide, Table 1.
(4) Test Worksheet, daily, for all tests performed at the plant.
Responsibilities of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
(a) Comprehensive Inspection.
(b) Acceptance Inspection and Testing.
(1) If deficiencies are found during an AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. inspection, the producer will be notified immediately to correct the deficiencies to the satisfaction of the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him.. Production will be suspended for critical deficiencies.
(2) If consecutive inspections reveal identical deficiencies, or if additional deficiencies are found, the producer will be notified that a reinspection will be held in two production days. All deficiencies shall be corrected by the reinspection date.
(3) If reinspection fails, the OMT will assign an InspectorThe authorized representative of the procurement officer assigned to make detailed inspection of any or all portions of the work, or materials therefore. to monitor plant operations for a maximum of five AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. production days. If at the end of this period the quality control process is not satisfactory, plant approval will be rescinded and the plant shall be recertified before AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. production will be continued.
(4) Recertification of Concrete Plant. Documentation of corrective action shall be submitted to the OMT by a professional engineer registered in the State of Maryland. When this documentation is approved by the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him., a comprehensive inspection will be conducted to recertify the concrete plant.
(c) Independent Assurance Audits (IAA). The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will evaluate the proficiency and equipment of QC/QA Technicians through audits performed on a random basis as outlined in the Quality Assurance Manual. The Technician being audited shall cooperate with the IAA Technician in the evaluation of their proficiency and equipment.
(d) Technician CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 560.
915.03.06 Moisture Probes. Moisture probe readings may be used in place of actual daily moisture testing of fine aggregate. When used, moisture probes shall be calibrated and maintained per the manufacturer’s recommendations. Actual moisture tests for the fine aggregate shall be performed weekly and as directed. When the actual tests of the fine aggregate indicate a difference of greater than 0.5 percent free moisture than that of the moisture probe readings, a second actual test shall be performed immediately. When the second test indicates a moisture difference of greater than 0.5 percent, then the moisture probe shall be recalibrated per the manufacturer’s recommendations and verified. Records of all calibrations and weekly tests shall be maintained and made available to the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
915.04 BASE COURSE PLANTS
915.04.01 Nonstabilized. Base course plants producing graded aggregate base material without a stabilizing agent shall meet 915.01, 915.04.03, and the following:
(a) The material is produced in a processing plant using an approved aggregate source.
(b) The Quality Control Plan shall be submitted to and approved by the OMT prior to production.
(c) The production shall meet the gradation requirements of the approved job mix formula.
(d) The required moisture content shall be maintained prior to shipment.
(e) Stockpiles shall be maintained to prevent segregation.
(f) Frozen aggregates shall not be used.
(g) Mixed material shall be handled and transported in a manner that will minimize segregation and the loss of moisture. All loads shall be covered in accordance with State laws unless hauling is off road and approved by the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
915.04.02 Stabilized.
(a) Mechanical mixers shall be used, as approved. All plants shall be equipped with automatic cutoff devices interlocked so the plant will stop operating if delivery of any component of the mix fails.
(b) The amount of stabilization shall be determined per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 254.
(c) The charge in a batch mixer or rate of feed to a continuous mixer shall not exceed that which will permit complete mixing of all materials.
(d) Mixed materials shall be handled and transported in a manner that will minimize segregation and loss of moisture or volatiles. All loads shall be covered in accordance with State laws unless hauling is off road and approved by the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
(e) When cement is used as a stabilizing agent, the amount of water added at the plant shall be controlled to obtain a uniform mixture that meets the required density.
(f) When emulsified asphalt is used as a stabilizing agent, all aggregate shall contain moisture in excess of the saturated surface dry condition at time of mixing.
915.04.03 CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. of Base CourseThe one or more layers of specified material and thickness placed on a subbase or a subgrade to support a surface course. Plants. The quality control and condition of all materials used in base courses, as well as all necessary adjustments required in using the materials, is the responsibility of the base course producer. The quality assurance process will be subject to unannounced periodic inspection by representatives of the OMT when AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. projects are in progress. The plant’s certified technician shall participate in the inspection.
Inspection. Any plant initially setting up and starting production will be subject to a comprehensive inspection to determine whether the plant equipment and personnel meet all applicable SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a requirements. After the initial inspection the plant shall meet 915.01.04. The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will accept certification by a professional engineer registered in the State of Maryland that the plant facilities meet all applicable SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a requirements. However, final acceptance will be determined by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
Responsibilities of the Base CourseThe one or more layers of specified material and thickness placed on a subbase or a subgrade to support a surface course. Producer.
(a) Notification. Notify the OMT one working day prior to producing materials for AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. projects.
(b) Quality Control. The producer is responsible for quality control of plant operations to ensure that the material meets SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a requirements. All producers supplying base courses shall have a certified base course plant technician present while base course material is being plant mixed and delivered to the project. This technician shall supervise base course production.
(1) Control tests shall be performed by a certified base course plant technician. This technician shall obtain samples and test per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) Frequency Guide, Table 1 and 2.
(2) Technician certification will be awarded upon satisfactory completion of an examination given by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. in per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 562. The certification shall be as follows:
Applications for certification shall be obtained from OMT a minimum of 30 days prior to producing material for the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
OMT will contact the producer and schedule an examination based on AASHTOAmerican Association of State Highway and Transportation Officials and MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) procedures and knowledge of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.’s base course plant reports and documentation.
Upon satisfactory completion of the examination, a certificate will be issued.
(3) Supply all necessary test equipment and provide on-site facilities suitable for conducting the required tests. Off-site test facilities require approval of OMT.
(c) Reports. The following reports shall be processed by the producer:
(1) AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. Form MD SHA Form 43, daily, stating that the material was sampled and tested using the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.’s sampling and testing guidelines and meets the applicable Specifications. Distribution to the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.’s LaboratoryThe testing laboratory of the State Highway Administration (or other Administrations) or any other testing laboratory designated by the procurement officer. and producer’s file.
(2) AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. Form MD SHA Form 88, for all additives introduced at the plant, frequency in accordance with Table 2. Make a distribution to the producer’s file and AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.’s LaboratoryThe testing laboratory of the State Highway Administration (or other Administrations) or any other testing laboratory designated by the procurement officer..
(3) Daily Plant CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. Form showing that a technician was on duty at the plant. Make a distribution to project file and producer’s file.
(4) Test Worksheet, daily, for all tests performed at the plant.
(5) Base course plant checklist daily. Make a distribution to producer’s file.
Responsibilities of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
(a) Comprehensive Inspection.
(b) Acceptance Inspection and Testing.
(1) If deficiencies are found, as defined in the base course plant checklist during an acceptance inspection, the producer will be notified immediately and operations will be suspended if corrections are not made to the satisfaction of the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
(2) If on consecutive inspections identical deficiencies are found, the producer will be notified that a reinspection will be held in two AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. production days. All deficiencies shall be corrected by the reinspection date. OMT will determine whether plant certification will be revoked.
(c) Independent Assurance Audits (IAA). The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will evaluate the proficiency and equipment of QC/QA Technicians through audits performed on a random basis as outlined in the Quality Assurance Manual. The technician being audited shall cooperate with the IAA Technician in the evaluation of their proficiency and equipment.
(d) Recertification of Aggregate Base CourseThe one or more layers of specified material and thickness placed on a subbase or a subgrade to support a surface course. Plant. Documentation of corrective action shall be submitted by a professional engineer registered in the State of Maryland. When this documentation is approved, a comprehensive inspection will be conducted to recertify the base course plant.
(e) Technician CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore..Per MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) 562.
915.05 CERTIFIED PRECAST CONCRETE PLANTS.
All plants producing precast concrete items shall be certified by the National Precast Concrete Association. The producer is responsible for quality control plant operations to ensure that the material meets Specifications. The quality control process will be subject to unannounced periodic inspection by representatives of the Concrete Technology Division. The plant’s certified technician shall fully participate in the inspections.
Initial Inspection. Any plant initially setting up and starting production will be subject to a comprehensive inspection to determine whether plant equipment and personnel meet all applicable Specifications and that suitable testing facilities will be available. The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will accept certification by a professional engineer registered in the State of Maryland that the plant facilities meet all applicable Specifications; however, final acceptance will be determined by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
915.05.01 Responsibilities of the Precast Concrete Producer.
(a) Notification. Notify the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. at least two working days prior to producing materials for AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. projects.
(b) Quality Control Procedures. Quality control procedures shall include the following:
(1) Sampling and testing per Tables 1, 2, and 3 of the MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) Sample Frequency Guide.
(2) The method of inspecting reinforcement steel placement and forms prior to pouring concrete.
(3) The method of curing the concrete.
(4) The method of maintaining accurate quality control records.
(5) Samples of documents approved by the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
(6) Patching procedures.
(7) Methods of preparing the concrete units for shipment.
(8) A method of identifying each piece as tested and approved by quality control.
(c) Quality Control Plan. Submit a Quality Control Plan prior to the start of production. The plan shall indicate the following:
(1) All precast concrete products shall meet the StandardsThe official Standards for Highway and Incidental Structures, maintained on the Administration website. The latest incorporated revisions issued on or before the date of advertisement of the Contract. or approved working drawings. All materials shall be from an AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. approved source and meet all applicable Specifications.
(2) The plan shall indicate how the producer intends to handle all of its materials. CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. of materials shall be as specified in the MSMTMaryland Standard Method of Tests (as developed by the State Highway Administration) Sample Frequency Guide.
(3) The names, qualifications, and responsibilities of a Quality Control Manager and a Quality Control Technician.
(d) Quality Control Technician. The Quality Control Technician may be approved if certified from at least one of the following:
(1) The Precast/Prestressed Concrete Institute Plant CertificationA document which verifies that the material and work complies with the applicable specifications and includes the actual test results to confirm the statement. The contents of the certification shall be on the Contractor's/vendor's/manufacturer's letterhead or approved document and shall be duly signed by a company officer. Certifications for metal products, when required, shall include a statement that the material was melted and manufactured in the United States except as provided in Section 165 of the Surface Transportation Assistance Act of 1982, as amended by Section 1041(a) and 1048(a) of the Intermodal Surface Transportation Efficiency Act of 1991 with regard to the furnishing and coating of iron and steel products. A nationwide waiver for this provision has been granted for pig iron and processed, pelletized, and reduced iron ore. Program, PCI Technician Level I, minimum.
(2) American Concrete Institute, ACIAmerican Concrete Institute Field Technician Level I.
(e) Test EquipmentAll machinery, tools, and apparatus necessary for the proper construction and acceptable completion of the work, together with the necessary supplies for upkeep and maintenance. and Facilities. Supply all necessary test equipment and provide AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. approved facilities suitable for conducting the various tests required. Off site test facilities shall be approved by the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him..
915.05.02 Responsibilities of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
(a) Comprehensive Inspection.
(b) Verification Testing.
(1) Verification of certification will be performed a minimum of once per year at the discretion of the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02..
(2) The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. reserves the right to discontinue acceptance of precast units if its verification indicates that materials or test procedures do not meet the Contract DocumentsThe written agreement executed between an Administration and the successful bidder, covering the performance of the work and furnishing of labor, equipment and materials, by which the Contractor is bound to perform the work and furnish the labor, equipment and materials, and by which the Administration is obligated to compensate him therefore at the mutually established and accepted rate or price. The Contract Documents shall include the Invitation for Bids, Notice to Contractors, Instructions to Bidders, Proposal, Contract Forms and Bonds, General Provisions, Specifications, Supplemental Specifications, all Special Provisions, all Technical Provisions, all Plans and Notices to Proceed, also any written Change Orders and Supplemental Agreements that are required to complete the construction of the work in an acceptable manner, including authorized extension thereof.


SPECIAL PROVISION INSERTS

The following Special Provision Inserts update Section 915 after the official publication of the Standard SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a. Updated documents may be found within the Standard and Supplemental Specifications for Construction and Materials on the MDOTMaryland Department of Transportation SHA web page.

SPI-Section 915-Production Plants. Dated 8/10/2017.