Section_703_Aggregate.doc

Section 703

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

Designated Sieve

(AASHTO T 27 & T 11)

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.

Table 703-2

Target Value Ranges for Subbase and Base Gradation

100(1)

D (Base)

C (Base)

100(1)

4.0 –7.0 (3)

B (Subbase)

40 – 60 (8)

4.0 – 12.0 (4)

65 – 79 (6)

45 – 59 (7)

(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

Designated Sieve

(AASHTO T 27 & T 11)

ADVANCE \d 3(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.

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

For the surface course, do not use aggregates known to polish or carbonate aggregates containing less than 25 percent by mass of insoluble residue when tested according to ASTM D 3042.

(b) Fine aggregate (passing a No. 4 sieve). Furnish natural sand, stone screenings, slag screenings, or a combination thereof conforming to AASHTO M 29 including sulfate soundness and the following:

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

(2) Sand equivalent value, AASHTO T 176, 45 min.

alternate method no. 2, reference method

(c) Composite aggregate blend. Size, grade, and combine the aggregate fractions in mix proportions conforming to the following:

(1) Gradation Table 703‑4

(2) Clay lumps and friable particles, AASHTO T 112 1.0% max.

(3) Reasonably free from organic or other deleterious material

(d) Lightweight aggregate (slag). Furnish crushed slag conforming to the quality requirements of AASHTO M 195. Do not use any other kind or type of lightweight aggregate as defined in AASHTO M 195.

Table 703‑4

Target Value Ranges for

Hot Asphalt Concrete Pavement Aggregate Gradation

Sieve

Size Percent by Mass Passing Designated Sieve

(AASHTO T 27 & T 11)

Grading Designation

ADVANCE \d 4(1) Statistical procedures do not apply.

* Contractor specified target value.

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

703.08 Open‑Graded Asphalt Friction Course Aggregate. Conform to Subsection 703.07 grading F and the following:

(a) 2 or more fractured faces, ASTM D 5821 75% min.

(b) 1 or more fractured faces, ASTM D 5821 90% min.

(c) Flakiness index, ASTM D 4791 30 max.

703.09 and Tables 703-5 and 703-6 Reserved.

703.10 Asphalt Surface Treatment Aggregate. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel. Use only one type of aggregate on a project.

Size, grade, and combine the aggregate fractions in mix proportions conforming to the following:

(a) Gradation Table 703-7

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

(c) Sodium sulfate soundness loss, 12% max.

AASHTO T 104

(d) Fractured faces, ASTM D 5821 90% min.

(e) Flat and elongated particles, 10% max.

1:3 ratio & 3/8-inch sieve calculated by mass, weighted average, ASTM D 4791

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

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

(h) Clay lumps and friable particles, AASHTO T 112 1.0% max.

Do not use lightweight aggregate according to AASHTO M 195.

Table 703‑7

Target Value Ranges for

Single and Multiple Course Surface Treatment Aggregate Gradation

Size

Grading Designation

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

703.11 Slurry Seal and Micro-Surfacing Aggregate. Furnish natural or manufactured sand, slag, crushed fines, or other mineral aggregate conforming to AASHTO M 29 and the following:

(a) Slurry seal aggregate.

(1) Gradation Table 703-8

(2) Los Angeles abrasion, AASHTO T 96 35% max.

(3) Sand equivalent value, AASHTO T 176, 45 min.

alternate method no. 2, reference method

(4) Smooth textured sand with < 1.25% 50% max.

water absorption content by weight of total combined aggregate

Table 703‑8

Slurry Seal and Micro-Surfacing Aggregate

Gradation(1) and Application Rates(2) Sieve

Size Percent by Mass Passing Designated Sieve

Slurry Seal Type

(2) Based on the dry mass of the aggregate.

(b) Micro-surfacing aggregate.

(1) Gradation, type II or III Table 703-8

(2) Los Angeles abrasion, AASHTO T 96 30% max.

(3) Sand equivalent value, AASHTO T 176, 65 min.

alternate method no. 2, reference method

(4) Sodium sulfate soundness, AASHTO T 104

Using NA2SO4 15 max.

Using MgSO4 25 max.

703.12 Choker Aggregate. Furnish hard durable particles or fragments of crushed gravel or crushed stone conforming to the following:

(a) Gradation Table 703-9

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

alternate method no. 2, reference method

(c) Free from organic matter and clay balls

Table 703‑9

Choker Aggregate Gradation(1) Sieve

Size Percent by Mass Passing

Designated Sieve

(AASHTO T 27 & T 11)

ADVANCE \d 2(1) Statistical procedures do not apply.

703.13 Blotter. Furnish sound durable particles of gravel or crushed stone conforming to the following:

(a) Material passing 3/8-mm sieve, AASHTO T 27 100%

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

(c) Free of organic matter and clay balls

703.14 Aggregate for Aggregate-Topsoil Course. Conform to the following:

(a) Gradation AASHTO M 43, size number 57

(b) Quality AASHTO M 80, class E

703.15 Sand. Furnish clean material conforming to the following:

(a) Gradation

AASHTO M 6

(b) Deleterious substances AASHTO M 6, class B

703.16 Aggregate for Lean Concrete Backfill. Furnish hard, clean, durable, nonplastic, nonorganic, nonreactive aggregate.

703.17 Superpave Asphalt Concrete Pavement Aggregate. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming to the following:

(a) Los Angeles abrasion, AASHTO T 96 35% max.

(b) Sodium sulfate soundness loss of coarse 12% max.

and fine aggregate (5 cycles), AASHTO T 104

(c) Fractured faces, ASTM D 5821 Table 703-10

(d) Fine aggregate angularity, AASHTO T 304, Table 703-11 method A

(e) Flat and elongated particles, 3 to 1 ratio, Table 703-11

ASTM D 4791

(f) Sand equivalent value, AASHTO T 176, Table 703-11 alternate method no. 2, reference method

(g) Gradation. See Table 703-12. Size, grade, and combine the aggregate fractions in mix proportions that result in a composite blend between the control points. Nominal maximum size is one sieve size greater than the first sieve to retain more than 10 percent of the combined aggregate. Test according to AASHTO T 27 and T 11.

For the surface course, do not use aggregates known to polish or carbonate aggregates containing less than 25 percent by mass of insoluble residue when tested according to ASTM D 3042.

Table 703-10

Fractured Faces Coarse Aggregate Requirement

Traffic

ESALs (million) Fractured Faces

(1face % min. / 2 face % min.)

Depth from Surface

ADVANCE \d 3Note: "85/80" denotes that a minimum of 85 percent of the coarse aggregate has one fractured face and a minimum of 80 percent has two fractured faces.

Table 703-11

Superpave Aggregate Requirements

Depth from Surface

Table 703-12

Superpave Aggregate Gradation

Sieve

Size Nominal Maximum Aggregate Size – Percent Passing

Grading Designation

* Contractor specified target values. See Table 703-13 for allowable deviations.

Table 703-13

Allowable Deviations for Target Value Gradations

Gradation Range

(inches) Allowable Deviation

(percent)

Table 703-14

Coarse and Fine Gradation Classification

703.18 Shotcrete Aggregate. For fine aggregate, furnish rounded particles conforming to Subsection 703.01. For coarse aggregate, conform to AASHTO M 80, class B, 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.

Combine the aggregates to meet the designated gradation in Table 703-15

Table 703 - 15

Shotcrete Gradation Limits for Combined Aggregates

Sieve

Size Percent by Mass Passing Designated Sieve

Grading Designation

703.19 Recycled Asphalt Pavement. Furnish recycled asphalt pavement that is processed in some form (by crushing and screening) to produce a well graded gradation and asphalt content. Process recycled asphalt pavement so that no particle in the mixture made with recycled asphalt pavement will exceed the mixture maximum aggregate size at the time of production. Millings will be considered processed provided they have a uniform gradation and asphalt content. Provide recycled asphalt pavement material with a maximum of 2 percent deleterious materials.