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General Provisions (00100-00999)

704AGGREGATES

VT · 2024 Standard Specifications✓ Full text on BuildSpecBook pages 1160–1177 Save this section

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704

7-8SECTIO N 704 – AGGREGATES

704.01FINE AGGREGATE FOR CONCRETE . Fine aggregate for concrete shall consist of natural

sand, manufactured sand, or stone screenings washed in an approved manner or a combination thereof. Fine aggregate shall consist of clean, hard, durable grains, unifo rmly graded from coarse to fine, shall be free from detrimental amounts of organic matter or other harmful substances, and shall be obtained from approved sources.

(a)Grading . Fine aggregate for concrete shall meet the gradation requirements of Table 704. 01A as

determined in accordance with AASHTO T 27. TABLE 704.01A – GRADATION OF FINE AGGREGATE FOR CONCRETE Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 3/8 inch (9.50 mm) 100 No. 4 (4.75 mm) 95 – 100 No. 16 (1.18 mm) 50 – 80 No. 30 (0.600 mm) 25 – 60 No. 50 (0.300 m m) 10 – 30 No. 100 (0.150 mm) 2 – 10 The fineness modulus on that portion of material passing the 3/8 inch (9.50 mm) sieve shall be determined by laboratory sieve tests. The fineness modulus is defined as the summation of the percentages of sand retained on the No. 100 (0.150 mm), No. 50 (0.300 mm), No. 30 (0.600 mm), No. 16 (1.18 mm), No. 8 (2.36 mm), and No. 4 (4.75 mm) sieves, divided by 100. The minimum and maximum fineness moduli shall be 2.30 and 3.10, respectively. Fine aggregate from any one source for any one designated mix having a variation in fineness modulus greater than ± 0.20 from the fineness modulus of a representative sample proposed for use may be rejected.

(b)Organic Impurities . Fine aggregate for concrete shall have an organic plate number of two or less

as determined in accordance with AASHTO T 21 .

704 7-9 (c) Compressive Strength of Mortar . When sand or a combination of stone screenings and sand is mixed with Portland cement in th e proportion of one part of cement to three parts of sand (or of the combination of stone screenings and sand) by mass (weight), according to the standard method of making 2 inch cubes, the resulting mortar at the ages of 3 days and 7 days shall have a compressive strength of at least 100% of that developed in the same time by mortar of the same proportions and flow, made of the same cement and graded Ottawa sand, when tested in accordance with AASHTO T 106 .

(d)Soundness . A soundness test shall be performe d on the aggregate in accordance with AASHTO T

104. The weighted average percentage of loss shall be not more than 8% by mass (weight) when subjected to five cycles of the sodium sulfate soundness test.

704.02COARSE AGGREGATE FOR CONCRETE . Coarse aggrega te for concrete shall consist of

clean, hard, crushed stone or washed crushed gravel free of deleterious material. Crushed stone and crushed gravel shall not be blended in the stockpile. It shall be obtained from approved sources and shall meet the followi ng requirements:

(a)General Requirements . Coarse aggregate for concrete shall meet the requirements of Table

TABLE 704.02A – COARSE AGGREGATE FOR CONCRETE PROPERTIES Property Test Method Requirement Percent wear (igneous) AASHTO T 96 50% max. Percent wear (all other) AASHTO T 96 35% max. Flat and elongated particles (1:5 ratio) ASTM D4791 10% max. Soundness (5 cycles, sodium sulfate solution) AASHTO T 104 8% max. Angularity (one fractured face) AASHTO T 335 100% min. Angularity (two fractured faces) AASHTO T 335 50% min.

704 7-10 (b) Coarse Aggregate for Concrete, 3/8 Inch . The gradation of 3/8 inch coarse aggregate for concrete shall meet the requirements of Table 704.02B as determined in accordance with AASHTO T 27 . TABLE 704.02B – GRADATION OF COARSE AGGREGATE FOR CONCRETE, 3/8 INCH Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 1/2 inch (12.5 mm) 100 3/8 inch (9.50 mm) 85 – 100 No. 4 (4.75 mm) 10 – 30 No. 8 (2.36 mm) 0 – 10 No. 16 (1.18 mm) 0 – 5

(c)Coarse Aggregate for Concrete, 3/4 Inch . The gradation of 3/4 inch coarse aggregate for concrete

shall meet the requirements of Table 704.02C as determined in accordance with AASHTO T 27 . TABLE 704.02C – GRADATION OF COARSE AGGREGATE FOR CONCRETE, 3/4 INCH Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 1 inch (25.0 mm) 100 3/4 inch (19.0 mm) 90 – 100 3/8 inch (9.50 mm) 20 – 55 No. 4 (4.75 mm) 0 – 10 No. 8 (2.36 mm) 0 – 5

(d)Coarse Aggregate for Concrete, 1 -1/2 Inch . The gradation of 1 -1/2 inch coarse aggregate for

concrete shall meet the requirements of Table 704.02D as determined in accordance with AASHTO T 27. TABLE 704.02D – GRADATION OF COARSE AGGREGATE FOR CONCRETE, 1 -1/2 INCH Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 2 inch (50.0 mm) 100 1-1/2 inch (37.5 mm) 95 – 100 3/4 inch (19.0 mm) 35 – 70 3/8 inch (9.50 mm) 10 – 30 No. 4 (4.75 mm) 0 – 5 704 7-11 704.03 AGGREGATE FOR RAILROAD BALLAST . Aggregate for railroad ballast shall be granite, traprock, or quartzite, free of carbonates and slag, and meet the requirements of AREMA Chapter 1, Section 2.3 . and AREMA Chapter 1, Section 2. 4. Aggregate for railroad ballast shall meet the following gradation requirements in accordance with AREMA Table 1 -2-1 for the respective size number :

(a)Aggregate for Railroad Ballast, Type 3 . Type 3 aggregate for railroad ballast shall be size number

3.

(b)Aggregate for Railroad Ballast, Type 4 . Type 4 aggregate for railroad ballast shall be size number

4.

(c)Aggregate for Railroad Ballast, Type 5 . Type 5 aggregate for railroad ballast shall be size number

5.

704.04GRAVEL FOR SUBBASE . Gra vel for subbase shall consist of material reasonably free from silt,

loam, clay, and organic matter. It shall be obtained from approved sources and shall meet the following requirements:

(a)Grading . Gravel for subbase shall meet the gradation requirements of Table 704.04A as determined

in accordance with AASHTO T 27 and AASHTO T 11 . TABLE 704.04A – GRADATION OF GRAVEL FOR SUBBASE Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves No. 4 (4.75 mm) 20 – 60 No. 100 (0.150 mm) 0 – 12 No. 200 (0.075 mm) 0 – 6

(b)Percent of Wear . The percent of wear shall not be more than 50% when tested in accordance with

AASHTO T 96 .

704.05CRUSHED GRAVEL FOR SUBBASE . Crushed gravel for subbase shall be produced from

gravels or crushed quarried rock and shall be a reasonably free from silt, loam, clay, or organic matter. It shall be obtained from an approved source and shall meet the following requirements:

704 7-12 (a) General Requirements .

(1)Percent of Wear . The maximum percent of wears hall be 40% as determined in accordance

with AASHTO T 96 .

(2)Fractured Faces . At least 50% by mass (weight) of the material coarser than the No. 4 (4.75

mm) sieve shall have at least one fractured face as determined in accordance with AASHTO T 335 .

(b)Crushed Gravel for Subbase, Fine Graded . Fine graded crushed gravel for subbase shall meet the

gradation requirements of Table 704.05A as determined in accordance with AASHTO T 27 and AASHTO T 11 . TABLE 704.05A – GRADATION OF CRUSHED GRAVEL FOR SUBBASE, FINE GRADED Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 2 inch (50.0 mm) 100 1-1/2 inch (37.5 mm) 90 – 100 No. 4 (4.75 mm) 30 – 60 No. 100 (0.150 mm) 0 – 12 No. 200 (0.075 mm) 0 – 6

(c)Crushed Gravel for Subbase, Coarse Graded . Coarse graded crushed gravel for subbase shall meet

the gradation requirements of Table 704.05B as determined in accordance with AASHTO T 27 and AASHTO T 11 . TABLE 704.05B – GRADATION OF CRUSHED GRAVEL FOR SUBBASE, COARSE GRADED Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 4 inch (100 mm) 95 – 100 No. 4 (4.75 mm) 25 – 50 No. 100 (0.150 mm) 0 – 12 No. 200 (0.075 mm) 0 – 6

704 7-13 704.06 DENSE GRADED CRUSHED STONE FOR SUBBASE . Dense graded crushed stone for subbase shall consist of product resulting from the mechanical crushing of quarried bedrock, boulders, or cobbles. It shall be sufficiently free from dirt, deleterious material, and pieces that are structurally weak, shall be obtained from approved sources, and shall meet the following requirements:

(a)Grading . Dense graded crushed stone for subbase shall meet the gradation requirements of Table

704.06A as determined in accordance with the requirements of AASHTO T 27 and AASHTO T 11

TABLE 704.06A – GRADATION OF DENSE GRADED CRUSHED STONE FOR SUBBASE Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 3-1/2 inch (87.5 mm) 100 3 inch (75.0 mm) 90 – 100 2 inch (50.0 mm) 75 – 100 1 inch (25.0 mm) 50 – 80 1/2 inch (12.5 mm) 30 – 60 No. 4 (4.75 mm) 15 – 40 No. 200 (0.075 mm) 0 – 6

(b)Percent of Wear . The percent wear shall not be more than 40% when tested in accordance with

AASHTO T 96 . When the aggregate is composed of crushed igneous rock, the percent of wear shall be not more than 50% when tested in accordance with AASHTO T 96 .

(c)Flat and Elongated Particles . Not more than 30% by mass (weight) of the material coarser than the

No. 4 (4.75 mm) sieve shall consist of flat and elongated particles in accordance with the requirements of ASTM D4791 .

(d)Filler Material . Filler material shall consist of clean, hard, uniform graded, crushed stone or stone

screenings produced by the crushing process. The material shall consist of hard, durable particles sufficiently free from dirt, organic material, structurally weak pieces, and other deleterious materials and shall com ply with the requirements of Subsection 704.06(b) and Subsection

Filler material shall meet the gradation requirements of Table 704.06B as determined in accordance with AASHTO T 27 and AASHTO T 11 .

704

7-14TABLE 704.06B – GRADATION OF FILLER MATERIAL

Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 3/4 in (37.5 mm) 100 1/2 in (12.5 mm) 70 – 100 No. 4 (4.75 mm) 50 – 90 No. 100 (0.150 mm) 0 – 12 No. 200 (0.075 mm) 0 – 6

704.07GRAVEL FILTER FOR SLOPE STABILIZATION . Gravel filter for slope stabilization shall

consist of stone and sand that is reasonably free from loam, silt, clay, and organi c material and shall meet the requirements of Table 704.07A as determined in accor dance with AASHTO T 27 . TABLE 704.07A – GRADATION OF GRAVEL FILTER FOR SLOPE STABILIZATION Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 1/2 inch (12.5 mm) 100 No. 4 (4.75 mm) 20 – 80 No. 200 (0.075 mm) 0 – 12

704.08GRANULAR BACKFILL FOR STRUCTURES . Granular backfill for structures shall consist of

granular material reasonably free from loam, silt, clay, and organic material and shall meet the gradation requirements of Table 704.08A as determined in accordance with AASHTO T 27 and AASHTO T 11 . TABLE 704.08A – GRADATION OF GRANULAR BACKFILL FOR STRUCTURES Sieve Designation Percentage by Mass (Weight) Passing Square Mesh Sieves 3 inch (75.0 mm) 100 No. 4 (4.75 mm) 45 – 75 No. 100 (0.150 mm) 0 – 12 No. 200 (0.075 mm) 0 – 6

704 7-15 704.09 BACKFILL FOR MUCK EXCAVATION . Backfill for muck excavation shall consist of granular material or blasted rock broken into various sizes that will form a compact embankment with a minimum of voids. When granular material is used , it shall meet the requirements of Subsection 703.04 .

704.10AGGREGATE FOR BITUMINOUS CONCRETE MIXTURES . The aggregate for bituminous

concrete mixtures shall come from approved sources and be free from dirt, deleterious material, and pieces which are structurally weak. Coarse aggregate shall mean that portion of material coarser than the No. 8 (2.36 mm) sieve. C oarse aggregate for bituminous concrete mixtures shall consist of clean, hard, crushed stone or crushed gravel

and be uniformly graded.

Fine aggregate shall mean that portion of material finer than the No. 8 (2.36 mm) sieve. Fine aggregate

for bituminous concrete mixtures shall consist of stone screenings or a combination of stone screenings,

screened natural sand or manufactured sands, and other fine aggregates, such that at least 95% of any

individual stockpile of the fine aggregate will pass the 3/8 inch (9.50 mm) sieve.

At the discretion of the Agency, aggregates identified as prone to stripping will require testing to determine

stripping potential, and those with stripping shall require the use of an anti-strip additive meeting the

requirements of Subsection 702.04.

Aggregate for bituminous concrete mixtures shall meet the following requirements:

(a)Coarse Aggregates for Superpave. Coarse aggregates for Superpave bituminous concrete

pavement shall meet the requirements of Table 704.10A.

TABLE 704.10A – SUPERPAVE COARSE AGGREGATE PROPERTIES

Property Test Method Traffic Volume

(ESALs) Requirement

Percent wear (igneous) AASHTO T 96 All 50% max.

Percent wear (all other) AASHTO T 96 All 35% max.

Flat and elongated particles (1:5 ratio) ASTM D4791 All 10% max.

Soundness (5 cycles, sodium sulfate

solution) AASHTO T 104 All 12% max.

Angularity (one fractured face) AASHTO T 335 < 30,000,000 95% min.

≥ 30,000,000 100% min.

Angularity (two fractured faces) AASHTO T 335 < 30,000,000 90% min.

≥ 30,000,000 100% min.

704

(b)Fine Aggregates for Superpave. Fine aggregates for Superpave bituminous concrete pavement

shall meet the requirements of Table 704.10B.

TABLE 704.10B – SUPERPAVE FINE AGGREGATE PROPERTIES

Property Test Method Traffic Volume

(ESALs) Requirement

Angularity (uncompacted voids) AASHTO T 304, Method A All 45% min.

Soundness (5 cycles, sodium

sulfate solution) AASHTO T 104 All 12% max.

Sand equivalent (clay content) AASHTO T 176 < 30,000,000 45% min.

≥30,000,000 50% min.

(c)Coarse Aggregates for Bonded Wearing Course. Coarse aggregates for bonded wearing course

shall meet the requirements of Table 704.10C.

TABLE 704.10C – BONDED WEARING COURSE COARSE AGGREGATE PROPERTIES

Property Test Method Requirement

Percent wear (igneous) AASHTO T 96 50% max.

Percent wear (all other) AASHTO T 96 35% max.

Angularity (one fractured face) AASHTO T 335 95% min.

Angularity (two fractured faces) AASHTO T 335 90% min.

Flat and elongated particles (1:3 ratio) ASTM D4791 25% max.

Soundness (5 cycles, sodium sulfate solution) AASHTO T 104 12% max.

Clay lumps and friable particles AASHTO T 112 2% max.

(d)Fine Aggregates for Bonded Wearing Course. Fine aggregates for bonded wearing course shall

meet the requirements of Table 704.10D.

TABLE 704.10D – BONDED WEARING COURSE FINE AGGREGATE PROPERTIES

Property Test Method Requirement

Angularity (uncompacted voids) AASHTO T 304, Method A 45% min.

Soundness (5 cycles sodium

sulfate solution) AASHTO T 104 12% max.

Sand equivalent (clay content) AASHTO T 176 60% min.

Clay lumps and friable particles AASHTO T 112 2% max.

Methylene blue AASHTO T 330 10 mg/g max.

704

(e)Mineral Filler. Mineral filler may be used to aid in meeting the gradation requirements for

bituminous concrete mixtures. Mineral filler shall consist of approved limestone dust, talc dust,

hydrated lime, or Type I Portland cement. Mineral filler shall meet the requirements of Table

TABLE 704.10E – GRADATION OF MINERAL FILLER

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

No. 30 (0.600 mm) 100

No. 200 (0.075 mm) 75 – 100

704.11AGGREGATE FOR BITUMINOUS SURFACE TREATMENTS. Aggregate that is used for

bituminous surface treatments shall meet the following requirements:

(a)Sand Cover. Sand cover shall be a silica-free aggregate meeting the gradation requirements of

Table 704.11A as determined in accordance with AASHTO T 27 and AASHTO T 11.

TABLE 704.11A – GRADATION OF SAND COVER

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

No. 8 (2.36 mm) 100

No. 16 (1.18 mm) 50 – 85

No. 30 (0.600 mm) 25 – 60

No. 50 (0.300 mm) 5 – 30

No. 200 (0.075 mm) 0 – 10

704.12AGGREGATE FOR SURFACE COURSES AND SHOULDERS. Aggregate for surface courses

and shoulders shall consist solely of crushed gravel or crushed stone. It shall be obtained from approved

sources, be reasonably free from deleterious materials, and shall meet the following requirements:

(a)Aggregate Surface Course.
(1)Grading. Aggregate surface course shall be uniformly graded and shall meet the gradation

requirements of Table 704.12A as determined in accordance with AASHTO T 27 and

AASHTO T 11.

704

TABLE 704.12A – GRADATION OF AGGREGATE SURFACE COURSE

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

1-1/2 inch (37.5 mm) 100

1 inch (25 mm) 95 – 100

No. 4 (4.75 mm) 45 – 65

No. 100 (0.150 mm) 10 – 15

No. 200 (0.075 mm) 8 – 12

(2)Percent of Wear. The percent of wear shall not be more than 40% when tested in

accordance with AASHTO T 96.

(3)Fractured Faces. When crushed gravel is used, at least 50% by mass (weight) of the

material coarser than the No. 4 (4.75 mm) sieve from each stockpile shall have at least two

fractured faces as determined in accordance with AASHTO T 335.

(4)Plasticity Index. The plasticity index (PI) shall be between 4 and 8 when determined in

accordance with ASTM D4318.

(b)Aggregate Surface Course, Paths and Trails. Aggregate surface course for paths and trails shall

consist of clean, hard, crushed stone. It shall be reasonably free from dirt, deleterious material, and

pieces that are structurally weak. The material shall be uniformly graded and shall meet the

requirements of Table 704.12B as determined in accordance with AASHTO T 27 and AASHTO T

11.

TABLE 704.12B – GRADATION OF AGGREGATE SURFACE COURSE, PATHS AND TRAILS

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

3/8 inch (9.50 mm) 100

No. 4 (4.75 mm) 75-90

No. 8 (2.36 mm) 55 – 80

No. 16 (1.18 mm) 35 – 50

No. 30 (0.600 mm) 25 – 50

No. 200 (0.075 mm) 6 – 15

704

(c)Aggregate Shoulders.
(1)Grading. Aggregate for aggregate shoulders shall be uniformly graded and shall meet the

gradation requirements of Table 704.12C as determined in accordance with AASHTO T 27

and AASHTO T 11.

TABLE 704.12C – GRADATION OF AGGREGATE SHOULDERS

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

1 inch (25.0 mm) 100

3/4 inch (19.0mm) 90 – 100

No. 4 (4.75 mm) 35 – 65

No. 200 (0.075 mm) 9 – 15

(2)Fractured Faces. At least 50% by mass (weight) of the material coarser than the No. 4 (4.75

mm) sieve from each stockpile shall have at least two fractured faces as determined in

accordance with AASHTO T 335.

(d)Aggregate Shoulders, RAP. RAP for aggregate shoulders shall meet the requirements of

Subsection 704.22(a) and 100% of the material shall pass the 1-1/2 inch (37.5 mm) sieve prior to

placement.

704.13SAND FOR CEMENT MORTAR. Sand for cement mortar shall consist of clean, hard, durable

grains. It shall be uniformly graded from coarse to fine and shall be free from detrimental amounts of

organic matter or other harmful substances.

(a)Grading. Sand for cement mortar shall meet the gradation requirements of AASHTO M 45 as

determined in accordance with AASHTO T 27 and AASHTO T 11.

(b)Organic Impurities. The sand shall show a color of not greater than two when determined in

accordance with AASHTO T 21.

(c)Soundness. Soundness tests shall be performed on the aggregate in accordance with AASHTO T

104. The weighted average percentage of loss shall be not more than 8% by mass (weight) when

subjected to five cycles of the sodium sulfate soundness test.

704

704.14LIGHTWEIGHT COARSE AGGREGATE FOR CONCRETE. Lightweight coarse aggregate for

concrete shall be clean, hard, and uniformly graded. It shall be reasonably free from dirt, deleterious

material, and pieces that are structurally weak and shall meet the requirements of AASHTO M 195 and

ASTM C330. The Contractor shall submit the results of AASHTO M 195, Section 4.1.2; AASHTO M 195,

Section 5.2; ASTM C330, Section 5.1.2; and ASTM C330, Section 6.2 testing performed within the last 5

years.

(a)Organic Impurities. The aggregate shall show a color of not greater than two when determined in

accordance with AASHTO T 21.

(b)Percent of Wear. The percent of wear shall not be more than 50% when tested in accordance with

the requirements of AASHTO T 96.

(c)Flat and Elongated Particles. The flat and elongated particles shall conform to the requirements

specified in Subsection 704.02(a).

(d)Soundness. Soundness shall meet the requirements of Subsection 704.01(d).
(e)Density. The density of lightweight aggregate shall not differ by more than 10% from the density

submitted on the approved mix design.

704.15AGGREGATE FOR SHOTCRETE. Aggregate for shotcrete shall conform to the requirements of

AASHTO M 80.

(a)Grading. Aggregate for shotcrete shall meet the gradation requirements of Table 704.15A as

determined in accordance with AASHTO T 27 and AASHTO T 11.

TABLE 704.15A – GRADATION OF AGGREGATE FOR SHOTCRETE

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

1/2 inch (12.5 mm) 100

3/8 inch (9.50 mm) 90 – 100

No. 4 (4.75 mm) 70 – 85

No. 8 (2.36 mm) 50 – 70

No. 16 (1.18 mm) 35 – 55

No. 30 (0.600 mm) 20 – 35

No. 50 (0.300 mm) 8 – 20

No. 100 (0.150 mm) 2 – 10

704

(b)Percent of Wear. The percent of wear shall not be more than 50% when tested in accordance with

AASHTO T 96.

(c)Soundness. The weighted average percentage of loss shall be not more than 12% by mass when

subjected to five cycles of sodium sulfate solution in accordance with AASHTO T 104.

704.16DRAINAGE AGGREGATE. Drainage aggregate shall be produced from gravels or crushed

quarried rock, shall be obtained from approved sources, and shall consist of clean, hard, sound, and durable

material.

(a)Grading. Drainage aggregate shall be uniformly graded from coarse to fine and shall meet the

gradation requirements of Table 704.16A as determined in accordance with AASHTO T 27.

TABLE 704.16A – GRADATION OF DRAINAGE AGGREGATE

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

1 inch (25 mm) 100

3/4 inch (19.0) 90 – 100

3/8 inch (9.5 mm) 20 – 55

No. 4 (4.75 mm) 0 – 10

No. 8 (2.36 mm) 0 – 5

(b)Percent of Wear. The percent of wear shall not be more than 40% when tested in accordance with

AASHTO T 96.

(c)Soundness. Soundness shall conform to the requirements of Subsection 704.01(d).

704.17AGGREGATE FOR EROSION PREVENTION AND SEDIMENT CONTROL. Aggregate for

erosion prevention and sediment control (EPSC) shall consist of clean, hard, crushed stone or crushed

gravel and shall be reasonably free from dirt and deleterious material. It shall be uniformly graded and

meet the gradation requirements of Table 704.17A as determined in accordance with AASHTO T 27.

TABLE 704.17A – GRADATION OF AGGREGATE FOR EPSC

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

6 inch (150 mm) 100

4 inch (100 mm) 80 – 100

3 inch (75.0 mm) 40 – 60

2 inch (50.0 mm) 0 – 20

704

704.18SELECT BACKFILL FOR MSE STRUCTURES. Select backfill for mechanically stabilized

earth (MSE) structures shall be substantially free from organic matter and otherwise deleterious materials

and shall meet the following requirements:

(a)Grading. Select backfill material used in MSE structures shall conform to the gradation limits in

Table 704.18A as determined by AASHTO T 27.

TABLE 704.18A – GRADATION OF SELECT BACKFILL FOR MSE STRUCTURES

Sieve Designation Percentage by Mass (Weight)

Passing Square Mesh Sieves

4 inch (100 mm) 100

3 inch (75.0 mm) 75 – 100

No. 40 (0.425 mm) 0 – 60

No. 200 (0.075 mm) 0 – 12

(b)Soundness. Select backfill material shall be substantially free of shale or other soft particles with

poor durability characteristics. The material shall have a sodium sulfate soundness loss of less than

8% after five cycles, as determined in accordance with AASHTO T 104.

(c)Plasticity Index. The plasticity index (PI), as determined by the requirements of AASHTO T 90,

shall not exceed 6.

(d)Electrochemical Requirements.
(1)Metallically Reinforced Systems. Select backfill material for metallically reinforced

systems shall conform to the requirements of Table 704.18B.

TABLE 704.18B – BACKFILL FOR METALLICALLY REINFORCED SYSTEMS

Property Test Method Requirement

Resistivity at 100% saturation AASHTO T 288 3,000 ohm-cm min.

pH AASHTO T 289 5 – 10

Sulfates AASHTO T 290 200 ppm max.

Chlorides AASHTO T 291 100 ppm max.

Organic content AASHTO T 267 < 1%

704

(2)Geosynthetically Reinforced Systems. Select backfill material for geosynthetically

reinforced systems shall conform to the requirements of Table 704.18C.

TABLE 704.18C – BACKFILL FOR GEOSYNTHETICALLY REINFORCED SYSTEMS

Base Polymer Type Test Method Requirement

Polyester (PET) AASHTO T 289 3 < pH ≤ 9

Polyolefin (PP & HDPE) AASHTO T 289 3 < pH

(e)Uniformity Coefficient. Select backfill material shall have a minimum uniformity, CU, of 4.

704.19LIGHTWEIGHT FINE AGGREGATE FOR CONCRETE. Lightweight fine aggregate for

concrete shall be clean, hard, and uniformly graded. It shall be reasonably free from dirt and deleterious

material and shall meet the requirements AASHTO M 195 and ASTM C330. AASHTO M 195, Section

4.1.2; AASHTO M 195, Section 5.2; ASTM C330, Section 5.1.2; and ASTM C330, Section 6.2 testing will

not be required.

(a)Organic Impurities. The aggregate shall show a color of not greater than two when determined in

accordance with AASHTO T 21.

(b)Soundness. Soundness shall meet the requirements of Subsection 704.01(d).
(c)Density. The density of lightweight aggregate shall not differ by more than 10% from the density

submitted on the approved mix design.

704.20PROCESSED GLASS AGGREGATE. Materials used to produce processed glass aggregate

(PGA)shall consist of recycled glass food or beverage containers. PGA materials listed on the Agency’s

Approved Products List shall meet the following requirements:

(a)Grading. PGA shall be a crushed and screened material meeting the grading requirements of

AASHTO M 318, Section 5.2 and AASHTO M 318, Section 5.5.

(b)Deleterious Content. Small amounts (less than 5% total) of china dishes, ceramics, plate (window

or mirror) glass, or other glass products will be allowed in PGA. The PGA material shall not

contain more than trace amounts of screw tops, plastic cap rings, or other contaminants. Amounts

of contaminants greater than 1% by weight shall be grounds for rejection of the entire PGA batch.

704

(c)Hazardous Materials. Glass cullet shall be free of TV or other cathode ray tubes, fluorescent

lightbulbs, and shall not meet the definition of hazardous waste given in 42 U.S.C. § 6903 or in

the state or local jurisdiction. Glass containers containing, or having contained, toxic or hazardous

materials will not be allowed, and, when present, shall be grounds for rejecting the entire stockpile

of PGA or PGA blends.

(d)Process Control. PGA materials shall be subjected to process control testing. Process control tests

shall be performed at a minimum frequency of one test per 2,500 cubic yards of material produced

by a stable process and shall demonstrate conformance with the requirements of Subsection

(a), Subsection 704.20(b), and Subsection 704.20(c). A copy of each test result shall be

made available to the Engineer upon request.

704.21RECYCLED CONCRETE AGGREGATE. Recycled concrete aggregate (RCA) shall consist of

recycled concrete that has been crushed. RCA materials listed on the Agency’s Approved Products List

shall meet the requirements of AASHTO M 319 and the following exceptions:

(a)Grading. RCA shall be crushed to aggregate dimensions of 6 inches or less.
(b)Deleterious Content. Small amounts of brick, block or mortar may be present in the RCA at a level

not to exceed a total of 5% by weight. The RCA material shall not contain more than trace amounts

of wire, steel or plastic that were associated with the original placement of the concrete, bituminous

material, or unreacted cementitious materials. No additional wire, steel or plastic may be added to

the RCA. No discernable amounts of oils, fats, soaps, surfactants, or organic contaminants shall

be present in the RCA.

(c)Hazardous Materials. The recycled concrete aggregate shall not meet the definition of hazardous

waste given in 42 U.S.C. § 6903 or in the state or local jurisdiction. Concrete structures used to

contain hazardous materials will not be allowed, and, when present, shall be grounds for rejection

of the entire stockpile of RCA or RCA blends.

(d)Process Control. RCA materials shall be subjected to process control testing. Process control tests

shall be performed at a minimum frequency of one test per 2,500 cubic yards of material produced

by a stable process and shall demonstrate conformance with the requirements of Subsection

(a), Subsection 704.21(b), and Subsection 704.21(c). A copy of each test result shall be

made available to the Engineer upon request.

704.22RECYCLED ASPHALT MATERIALS. Recycled asphalt materials (RAM) include recycled

asphalt pavement (RAP) and recycled asphalt shingles (RAS).

The bitumen component of RAM shall be asphalt binder and shall be free of significant contents of

solvents, tars, and other volatile organic compounds or foreign substances that will make the RAM

unacceptable for recycling as determined by the Agency.

704

(a)Recycled Asphalt Pavement. RAP shall consist of crushed or milled bituminous concrete

pavement. The Contractor may blend, crush, or prepare the RAP into one or more homogenous

stockpiles. RAP used in Superpave bituminous concrete pavement shall meet the requirements of

Subsection 704.10(a) and Subsection 704.10(b).

(b)Recycled Asphalt Shingles. RAS materials shall come from an approved producer, and meet the

following requirements:

(1)Material. RAS shall consist of manufactured shingle waste or postconsumer shingles that

comply with the provisions of AASHTO M 350.

(2)Process Control. RAS materials shall be subjected to process control testing. Process

control tests shall be performed at a minimum frequency of one test per 2,500 cubic yards

of material produced by a stable process and shall demonstrate conformance with the

requirements of Subsection 704.22(b)(1). A copy of each test result shall be made available

to the Agency upon request.

705

7-26SECTION 705 – MASONRY UNITS

705.01BRICK . Brick masonry units shall meet the following requirements:

(a)Manhole Brick . Manhole brick shall be in accordance with ASTM C32, Grade MS.
(b)Sewer Brick . Sewer brick shall be in accordance with ASTM C32, Grade SM.
(c)Pedestrian Paving Brick . Pedestrian paving brick shall be in accordance with ASTM C902 , Class

SX, Type I.

(d)Vehicular Paving Brick . Vehicular paving b rick shall be classified as Application PS in accordance

with ASTM C1272 , unless otherwise specified.

(1)Mortar Bedded . Vehicu lar paving brick to be set in mortar, with a concrete or bituminous

base, shall be in accordance with ASTM C1272 , Type R.

(2)Aggregate Bedded . Vehicular paving brick to be set in aggregate shall be in accordance

with ASTM C1272 , Type F.

705.02CONCRETE MASONRY BLOCKS . Concrete masonry blocks shall be in accordance with ASTM

C139 .

705.03PRECAST DROP INLETS, CATCH BASINS, AND MANHOLES . Precast drop inlets, catch

basins, and manholes shall be in accordance with AASHTO M 199 .

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Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 1160–1177 of 1,380. View official source ↗

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Scoped to Vermont 2018 Standard Specifications for Construction, Section 704 — AGGREGATES. Every answer cites the section it came from, with a verification date — don’t trust a percentage, click the citation.