901 AGGREGATES

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901.01
This Section includes the material details, quality requirements, and test methods applicable to aggregates. Grading requirements are outlined in Tables 901 A and 901 C; physical properties in 901 B and 901 D. Force drying may be used in the preparation of samples for grading tests conducted in the field.
TABLE 901 A AGGREGATE GRADING REQUIREMENTS - T 27
MATERIALS SIEVE SIZE
2-1/2” 2” 1-1/2” 1” 3/4” 1/2” 3/8” No.

4

No.

8

No.

10

No.

16

No.

30

No.

40

No.

50

No.

100

No.

200

63 mm 50 mm 37.5 mm 25 mm 19 mm 12.5 mm 9.5 mm 4.75 mm 2.36 mm 2.0 mm 1.18 mm 600 µm 425 µm 300 µm 150 µm 75 µm
CRUSHER RUN AGGREGATE CR -6 (f)(g) 100 90-100 60-90 30-60 0-15
BANK RUN GRAVEL — SUBBASE 100 90-100 60-100 35-90 20-55 5-25
GRADED AGGREGATE — BASE DESIGN RANGE (a) 100 95-100 70-92 50-70 35-55 12-25 0-8
TOLERANCE (b) (-)2 ±5 ±8 ±8 ±8 ±5 ±3(c)
BANK RUN GRAVEL — BASE 100 85-100 60-100 35-75 20-50 3-20
COARSE AGGREGATE - PORTLAND CEMENT CONCRETE 57 and UNDERDRAIN (h) 100 95-100 25-60 0-10 0-5
67 100 90-100 20-55 0-10 0-5
7 100 90-100 40-70 0-15 0-5
FINE AGGREGATE — PORTLAND CEMENT CONCRETE, UNDERDRAIN, and PNEUMATIC MORTAR (d) 100 95-100 45-85 5-30 0-10
COARSE AGGREGATE — LIGHTWEIGHT PORTLAND CEMENT CONCRETE 100 90-100 10-50 0-15
FINE AGGREGATE — LIGHTWEIGHT PORTLAND CEMENT CONCRETE (d) 100 85-100 40-80 10-35 5-25
FINE AGGREGATE/SAND MORTAR and EPOXIES (d) 100 95-100 0-25 0-10
MINERAL FILLER 100 95-100 70-100
(a) To establish target values for design.
(b) Production tolerance.
(c) ±2 for field grading (omitting T 11).
(d) Fine aggregate includes natural or manufactured sand.
(e) Crushed glass shall not contain more than one percent contaminants by weight.
(f) Not to be used in the structural part of any AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. project.
(g) Recycled asphalt pavement may be used as a component not to exceed 15 percent and is not subject to aggregate physical property requirements in TABLE 901 B.
(h) Recycled concrete is prohibited in drainage applications.


TABLE 901 B AGGREGATE PHYSICAL PROPERTY REQUIREMENTS
MATERIAL TEST METHOD
SPECIFICATION T 90 T 11 T 96 T 104
PIPoplar Island MAX MATERIAL FINER THAN No. 200 SIEVE

%MAX

LOS ANGELES ABRASION

%MAX

SODIUM SULFATE SOUNDNESS

%MAX

CRUSHER RUN AGGREGATE CR-6 D 1241(a) 6 50
BANK RUN GRAVEL — SUBBASE D 1241 6 50
GRADED AGGREGATE — BASE D 1241 6 50
BANK RUN GRAVEL — BASE D 1241 6 50
COARSE AGGREGATE — PCC (b) M 80

CLASS A

1.0(c) 50 12
FINE AGGREGATE — PCC (b)(d) M 6

CLASS B

4.0(e) 10
COARSE AGGREGATE — LIGHTWEIGHT PCC M195
FINE AGGREGATE — LIGHTWEIGHT PCC (f) M195
FINE AGGREGATE/SAND MORTAR and EPOXIES M45 10
MINERAL FILLER (g) M17 4
GLASS CULLET (h) M 318
(a) Other approved inert materials of similar characteristics may be used provided they meet these provisions. For crushed reclaimed concrete, the soundness loss shall not exceed 18 percent after magnesium sulfate testing as specified in T 104.
(b) Test coarse and fine aggregate for PCC for alkali silica reactivity (ASR) per 902.10.
(c) 1.5 if material passing No. 200 sieve is dust of fracture, free of clay or shale.
(d) In areas exposed to traffic, manufactured sand shall have a minimum ultimate Dynamic Friction Value (DFV) of 40, based on the parent rock.
(e) 5.0 for concrete not subject to surface abrasion.
(f) Fine aggregate meeting M 6 may be used if the lightweight concrete does not exceed the maximum unit weight specified in 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.
(g) Fly ash shall not exceed 12 percent loss on ignition.
(h) For use as a granular road base material. Not intended for use in locations where surfacing will not be placed over the base.
TABLE 901 C ASPHALT MIXES AGGREGATE GRADING REQUIREMENTS, % PASSING FOR MIX DESIGN T 27
MATERIAL SIEVE SIZE
3/4in. 1/2in. 3/8in. No. 4 No. 8 No. 16 No. 30 No. 50 No. 100 No. 200
19.0 mm 12.5 mm 9.5 mm 4.75 mm 2.36 mm 1.18 mm 600 µm 300 µm 150 µm 75 µm
GAP GRADED STONE MATRIX ASPHALT MIX - 9.5mm 100 100 75–90 30–50 20–30 8–13
GAP GRADED STONE MATRIX ASPHALT MIX -12.5mm 100 90–99 70–85 28–40 18–30 8–11
GAP GRADED STONE MATRIX ASPHALT MIX -19.0mm 100 82–88 60 max 22–30 14–20 9–11
OPEN GRADED FRICTION COURSE – 9.5mm (a) 100 85–100 20–40 5–10 2–4
OPEN GRADED FRICTION COURSE – 12.5 mm (a) 100 85–100 55–75 15–25 5–10 2–4
OPEN GRADED FRICTION COURSE – 12.5mm (b) 100 80–100 35–60 10–25 5–10 1–4
SLURRY SEAL (SS) AND

MICRO -SURFACING (MS)

TYPE II 100 90–100 65–90 45–70 30–50 18–30 10–21 5–15
TYPE III 100 70–95 45–70 28–50 19–34 12–25 7–18 5–15
CHIP SEAL SURFACE TREATMENT 7 100 90–100 40–70 0–15 0–5
8 100 85–100 10–30 0–10 0–5
(a) Less than Design Level 4 (ESAL)
(b) Porous European Mix (PEM) – Design Level 4 (ESAL)
TABLE 901 D AGGREGATE PHYSICAL PROPERTY REQUIREMENTS FOR ASPHALT MIXES
MATERIAL TEST METHOD
SPECIFICATION T 11 T 96 T 104 D 4791 MSMT 216 T 279
MATERIAL

FINER THAN No. 200 SIEVE

% max

LOS

ANGELES ABRASION (LA)

% max

SODIUM

SULFATE SOUNDNESS

% max

FLAT

and ELONGATED (a)

% max

DYNAMIC FRICTION VALUE

(DFV) (b) (c)

min

BRITISH PENDULUM NUMBER

(BPN) (c)

min

SURFACE COURSE

4.75mm, 9.5mm, 12.5mm, and 19.0mm

M323 45 12 10 25
SURFACE COURSE — HIGH DFV

4.75mm, 9.5mm, 12.5mm, and 19.0mm

M323 45 12 10 40 (e)
BASE COURSE

19.0mm, 25.0mm and 37.5mm

M323 45 12 10
GAP GRADED STONE MATRIX ASPHALT

9.5mm, 12.5mm, and 19.0mm

M323 30 12 20/5 (g) 40 (e)
OPEN GRADED FRICTION COURSE

9.5 mm, 12.5 mm, 12.5 mm PEM (h)

MSMT 409 0.5 30 12 20/5 (g) 40 (e)
SLURRY SEAL (SS) and MICRO-SURFACING (MS) 12 40 (f) 30
CHIP SEAL SURFACE TREATMENT M 80, CLASS A 1.0 (d) 45
(a) Testing for flat and elongated particles shall be conducted on the blended aggregates. Dimensional ratio of calipers shall be 5:1.
(b) The minimum Dynamic Friction Value (DFV) shall be based on a single aggregate source or a blend of aggregates used. Determine proportions of blended aggregates using MSMT 416.
(c) DFV and British Pendulum Number (BPN) determined on parent rock. Reclaimed asphalt pavement (RAP) shall have a DFV of 30.0.
(d) 1.0 for samples taken at the point of production. Samples taken at any point after shipment shall have no more than 1.5 percent finer than 0.075 mm sieve.
(e) Carbonate rock shall have a minimum of 25 percent insoluble residue retained on the 0.075 mm sieve.
(f) No blending allowed.
(g) Testing conducted on particles retained on the 4.75 mm sieve. . Dimensional ratio of calipers shall be 3:1/5:1.
(h) Porous European Mix
901.01.01 Steel Slag. Steel slag may be used for chip seal surface treatment, but not for any other aggregate.
901.02 STONE FOR RIPRAP, CHANNELS, DITCHES, SLOPES, AND GABIONS.
Use field or quarry stone of approved quality. Stone may be certified from a source previously approved. Ensure that maximum dimension does not exceed four times the minimum dimension.
901.02.01 Stone for Riprap. Ensure that stone for riprap is uniformly graded from the smallest to the largest pieces as specified in 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. The stone will be accepted upon visual inspection at the point of usage, as follows:
CLASS OF RIPRAP SIZE PERCENT OF TOTAL

by weight

0 Heavier than 33 lb

Heavier than 10 lb

Less than 1 lb

0

50

10 max

I Heavier than 150 lb

Heavier than 40 lb

Less than 2 lb

0

50

10 max

II Heavier than 700 lb

Heavier than 200 lb

Less than 20 lb

0

50

10 max

III Heavier than 2000 lb

Heavier than 600 lb

Less than 40 lb

0

50

10 max

Note: Optimum gradation is 50 percent of the stone being above and 50 percent below the midsize. Reasonable visual tolerances will apply.
901.03 STONE FOR CHANNELS AND DITCHES.
Meet the size requirements of Class I Riprap and the following:
QUALITY REQUIREMENTS
TEST AND METHOD SPECIFICATION LIMITS
Apparent Specific Gravity T 85, min 2.50
Absorption T 85, % max 3.0
Sodium Sulphate Soundness - 5 cycles, 2-1/2 to 1-1/2 in.

Aggregate T 104, % loss max

20
901.04 STONE FOR SLOPES.
M 43, size number 1 omitting T 11. The stone shall also meet the quality requirements specified in 901.03.
901.05 STONE FOR GABIONS.
Meet the quality requirements specified in 901.03 except the loss by sodium sulfate shall not be greater than 12 percent:
DEPTH OF BASKET

in.

SIZE OF INDIVIDUAL PIECES *

in.

6 3-6
9 4-7
12 4-7
18 4-7
36 4-12
*Size of pieces will be determined visually.