Section 703.pdf

Attachment to AG-9AC7-S-11-0005

SECTION 703. — AGGREGATE

703.05 Subbase, Base, and Surface Course Aggregate.

(a) General. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming the following:

(1) Los Angeles abrasion, AASHTO T 96 50% max.

(2) Sodium sulfate soundness loss (5 cycles), 12% max.

AASHTO T 104

(3) Durability index (coarse), AASHTO T 210 35 min.

(4) Durability index (fine), AASHTO T 210 35 min.

(5) Fractured faces, ASTM D 5821 50% min.

(6) Free from organic matter and lumps or balls of clay

Do not use material that breaks up when alternately frozen and thawed or wetted and dried.

Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, shall consist of natural or crushed sand and fine mineral particles.

(b) Subbase or base aggregate. In addition to (a) above, conform to the following:

(1) Gradation Table 703-2

(2) Liquid limit, AASHTO T 89 25 max.

T a b le

-2

T a rg et

V a lu e

R a n g es f o r

S u b b a se a n d B a se

G ra d a ti o n

P er ce n t b y M a ss

P a ss in g D es ig n a te d

S ie v e

(A A

S H

T O

T a n d

T

G ra d in g D es ig n a ti

E

B a se

(1

.0

.0

(1

S ta ti st ic al p ro ce d u re s d o n o t ap p ly

T h e v al u e in t h e p ar en th es es i s th e al lo w ab le d ev ia ti o n fr o m t h e ta rg et v al u es

D

B a

(1

.0

.0

C

B a

.0

.0

B

S u b b a

(1

.0

.0

A

S u b b a se

(1

.0

.0

S ie v e

S iz e

½ i ch i

½ i i

/4 i

/2 i

/8 i

N

(c) Surface course aggregate. In addition to (a) above, conform to the following:

(1) Gradation and plasticity index, AASHTO T 90 Table 703-3

(2) Liquid limit, AASHTO T 89 35 max.

Do not furnish material that contains asbestos fibers.

Table 703-3

Target Value Ranges for

Surface Course Gradation and Plasticity Index

Sieve Size

Percent by Mass Passing

Designated Sieve

(AASHTO T 27 & T 11)

1 inch 100 (1)

3/4 inch 97 - 100 (1)

No. 4 41 - 71 (7)

No. 40 12 - 28 (5)

No. 200 9 - 16 (4)

Plasticity index 8 (4)

(1) Statistical procedures do not apply.

( ) The value in the parentheses is the allowable deviation ( ) from the target values.

703.06 Crushed Aggregate. Furnish hard, durable particles or fragments of crushed stone or gravel conforming to the size and quality requirements for crushed aggregate material normally used locally in the construction and maintenance of highways by Federal or State agencies. Furnish crushed aggregate with a maximum size of 1 inch as determined by

AASHTO T 27 and T 11. Furnish crushed aggregate uniformly graded from coarse to fine and free of organic matter, lumps or balls of clay, and other deleterious matter.