Specifications_703,_Table_703-3.pdf

Section 703

Section 703. — AGGREGATE

703.01 Fine Aggregate for Concrete. Furnish sand conforming to AASHTO M 6, class B including the reactive aggregate supplementary requirement, except as amended or supplemented by the following:

(a) Material passing No. 200 sieve, AASHTO T 11 3.0% max.

(b) Sand equivalent value, AASHTO T 176, 75 min.

alternate method no. 2, reference method

For lightweight fine aggregate, conform to AASHTO M 195.

703.02 Coarse Aggregate for Concrete. Conform to AASHTO M 80, class A, except as amended or supplemented by the following:

(a) Los Angeles abrasion, AASHTO T 96 40% max.

(b) Adherent coating, ASTM D 5711 1.0% max.

(c) Grading, AASHTO M 43 All sizes except numbers 8, 89, 9, or 10

For bridge decks or surface courses, do not use aggregates known to polish or carbonate aggregates containing less than 25 percent by mass of insoluble residue as determined by

ASTM D 3042.

For lightweight coarse aggregate, conform to AASHTO M 195.

703.03 Granular Backfill. Furnish aggregate for the following installations.

(a) Underdrain pipe with geotextile. Furnish granular backfill conforming to AASHTO M 80, class E and AASHTO M 43, size number 3, 4, 5, 7, 57, or 67.

(b) Underdrain pipe without geotextile. Furnish granular backfill conforming to AASHTO M 6, except the soundness test is not required.

703.04 Permeable Backfill. Furnish either sand conforming to Subsection 703.15 or coarse aggregate consisting of sound, durable particles of gravel, slag, or crushed stone conforming to Table 703-1.

Table 703 - 1 Permeable Backfill Gradation

Sieve Size Percent by Mass Passing

Designated Sieve

(AASHTO T 27 & T 11)

3 inch 100

3/4 inch 50 – 90

No. 4 20 – 50

No. 200 0.0 – 2.0

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.

E (B as e)

0(1

(6

(6

(4

4.

7.

(3

D (B

(6

(6

(6

(4

4.

7.

(3

C (B

(6

(6

4.

–7 .0

(3

B (S ub ba se

(1

(8

4.

.0 (4

Pe rc en t b y M as s P as si ng D es ig na te d Si ev e

(A A

SH

T

O T an d

T

1)

G ra di ng

D es ig na tio n

A (S ub ba se

0(1

(7

(6

(4

4.

8.

(3

T ab le

-2

T ar ge t V al ue R an ge s f or

S ub ba se a nd

B as e G ra da tio n

Si ev e Si ze

2½ in ch

1½

3/

1/

3/

N o.

N o.

N o.

St at is tic al p ro ce du re s d o no t a pp ly

T he v al ue in th e pa re nt he se s i s t he a llo w ab le d ev ia tio n

) f ro m th e ta rg et v al ue s..

(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.

703.07 Hot Asphalt Concrete Pavement Aggregate.

(a) Coarse aggregate (retained on a No. 4 sieve). Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming to the following:

(1) Los Angeles abrasion, AASHTO T 96 40% max.

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

AASHTO T 104

(3) Fractured faces, ASTM D 5821 75% min.