803Aggregate

Aggregate

803.1General

1 Before producing aggregate, remove vegetation, topsoil, and overburden from the pit area to be used. Ensure that the materials are free of deleterious substances and do not contain an excess of thin, flat, elongated, soft, or disintegrated pieces. Ensure that aggregates for plant mix base, pavement, wearing course, microsurfacing, and chip seal do not have adherent films of clay or other matter that could prevent thorough coating with asphalt.

2 When crushed aggregate is specified for subbases, bases, or plant mix pavements, crush boulders with diameters up to 30 in [750 mm] and distribute uniformly throughout the material.

3 The department defines a gradation requirement as the percentage of material by weight [mass] that passes through a laboratory sieve with square openings and of a size or designation in accordance with AASHTO M 92 (ASTM E 11). The department defines “coarse aggregate” as material retained on a No. 4 [4.75 mm] sieve and “fine aggregate” as material that passes through a No. 4 [4.75 mm] sieve.

4 For quarried aggregate, material rejected during primary crushing may be used in subbase or crushed base, provided the combined material meets applicable specifications; dispose of other rejected material as directed by the engineer. If quarrying from an available or mandatory source listed in the contract, crush the quarried material with a primary crusher to 4 in [100 mm] or less, without allowing more than 5 percent to pass through a 1-inch [25 mm] sieve.

803.2Aggregate for Concrete

803.2.1 Fine Aggregate

1 Use washed fine aggregate in accordance with AASHTO M 6 but not exceeding the limits in Table 803.2.1-1, Deleterious Substance Limits: Fine Aggregate for Concrete.

Table 803.2.1-1 Deleterious Substance Limits: Fine Aggregate for Concrete Substances Max. %, by weight [mass] Clay lumps 1.0 Coal and lignite 1.0 Material passing a No. 200 [75 µm] sieve 4.0

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2 Ensure the sum of the above materials and other deleterious substances, such as shale alkali, mica, coated grains, or soft and flaky particles, does not exceed 4 percent by weight [mass].

3 Ensure aggregate gradation is in accordance with T able 803.2.1-2, Gradation Requirements: Fine Aggregate for Concrete.

Table 803.2.1-2 Gradation Requirements: Fine Aggregate for Concrete Sieve % Passing ⅜ in [9.50 mm] 100 No. 4 [4.75 mm] 95 to 100 No. 16 [1.18 mm] 45 to 80 No. 50 [300 µm] 10 to 30 No. 100 [150 µm] 2 to 10 No. 200 [75 µm] 0 to 4

803.2.2 Coarse Aggregate

1 Wash coarse aggregate to remove adherent soil coatings and reduce the amount of material passing a No. 200 [75 µm] sieve at least 50 percent. Use aggregate consisting of crushed stone or gravel meeting the requirements of AASHTO M 80 but not exceeding the limits in Table 803.2.2-1, Deleterious Substance Limits: Coarse Aggregate for Concrete. When specified, provide aggregate in accordance with Subsection 803.6.2, Polish Resistant Aggregate.

Table 803.2.2-1 Deleterious Substance Limits: Coarse Aggregate for Concrete Substances Max. %, by weight [mass] Shale or coal 0.1 Clay lumps 0.5 Material passing a No. 200 (75 µm) sieve 2.0 Other deleterious substances such as friable, thin, elongated, or laminated pieces 3.0 All deleterious substances combined 5.0

2 Ensure coarse aggregate gradation for silica fume modified concrete meets the requirements of Table 803.2.2-2, Gradation Requirements: Coarse Aggregate for Silica Fume Modified Concrete.

3 Provide aggregate with an LA abrasion loss less than 40 percent when tested in accordance with AASHTO T 96 and that loses no more than 12 percent of its weight

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[mass] when tested in sodium sulfate solution in accordance with MTM 403.0. Ensure that the aggregate meets the requirements of T able 803.2.2-3, Gradation Requirements: Coarse Aggregate for Concrete.

Table 803.2.2-2 Gradation Requirements: Coarse Aggregate for Silica Fume Modified Concrete

Sieve % Passing Min. Max. ½ in [12.5 mm] 100 – ⅜ in [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 No. 200 [75 µm] 0 1.5

Table 803.2.2-3 Gradation Requirements: Coarse Aggregate for Concrete Sieve % Passing Structural Concrete Portland Cement Concrete Pavement(1) Classes A & B ClassS(1) 2½ in [63 mm] – – – 2 in [50 mm] – – – 1½ in [37.5 mm] 100 – 100 1 in [25.0 mm] 95 to 100 100 95 to 100 ¾ in [19.0 mm] – 90 to 100 – ½ in [12.5 mm] 25 to 60 – 25 to 60 ⅜ in [9.50 m] – 20 to 55 – No. 4 [4.75 mm] 0 to 10 0 to 10 0 to 10 No. 8 [2.36 mm] 0 to 5 0 to 5 0 to 5 No. 200 [75 µm] 0 to 2 0 to 2 0 to 2 (1)For these, and for class A concrete used for pavement, ensure that at least 50 percent of the material retained on the No. 4 [4.75 mm] sieve has at least one fractured face.

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803.3Aggregate for Mortar

1 For mortar, use aggregate in accordance with AASHTO M 45.

803.4Aggregate for Subbase and Base

803.4.1 General

1 For base and subbase, use coarse aggregate consisting of hard, durable particles or fragments of stone or gravel; use fine aggregate consisting of crushed stone, crushed gravel, or natural sand.

803.4.2 Subbase

1 For subbase, use crushed or natural stone, gravel, Reclaimed Asphalt Pavement (RAP), or crushed concrete in accordance with the following:

the source.

the No. 4 [4.75 mm] sieve has at least one fractured face.

803.4.3 Crushed Base

1 For crushed base, provide and use crushed, natural stone or gravel base aggregate that meets the requirements of Table 803.4.4-1, Gradation Requirements: Subbase and Base; Table 803.4.4-2, Aggregate Properties: Subbase and Base; and that is not moisture sensitive as determined by the Materials Testing Manual. Ensure that at least 50 percent of the material retained on the No. 4 [4.75 mm] sieve has at least one fractured face.

803.4.4 Gradation and Properties

1 Provide and use subbase and base that meets the requirements of Table 803.4.4-1, Gradation Requirements: Subbase and Base and Table 803.4.4-2, Aggregate Properties: Subbase and Base.

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Table 803.4.4-1 Gradation Requirements: Subbase and Base Sieve Grading J GR L K W % Passing 2 in [50 mm] 100 – – – – 1½ in [37.5mm] 90 to 100 – 100 100 100 1 in [25 mm] – 100 90 to 100 90 to 100 90 to 100 ¾ in [19 mm] – 90 to 100 – – – ½ in[12.5 mm] – 65 to 85 60 to 85 – 60 to 85 ⅜ in [9.50 m] – – – – – No. 4 [4.75 mm] 35 to 75 50 to 78 35 to 55 40 to 65 45 to 65 No. 8 [2.36 mm] – 37 to 67 25 to 50 30 to 55 33 to 53 No. 30 [600 µm] – 13 to 35 10 to 30 – – No. 200 [75 µm] 0 to 15 4 to 15 3 to 15 3 to 15 3 to 12

Table 803.4.4-2 Aggregate Properties: Subbase and Base Properties Subbase Crushed Base Crushed Base (Gravel Roads) LA abrasion loss, max., % 50 50 50 Liquid limit, max. 25 25 30 Plasticity index 0 to 6 0 to 3 4 to 12 R-Value, min. 60 75 60 Soundness (MgSO)(1) loss for coarse aggregate, max. – 18 18

803.5Aggregate for Flexible Pavement

803.5.1 General

1 Use aggregate that is tough and sound, of uniform quality, and crushed to size. Stockpile coarse and fine aggregates separately. Use aggregate consisting of crushed stone or crushed or natural gravel; do not use RAP unless designated in the contract . Do not exceed 15% of dry aggregate weight when using pit run filler.

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803.5.2 Pit Run Filler

1 Use nonplastic granular pit run filler consisting of granular material . Ensure that 100 percent passes through a ⅜ in [9.5 mm] sieve and from 90 to 100 percent passes a No. 4 [4.75 mm] sieve. Stockpile in its own pile.

803.5.3 Reclaimed Asphalt Pavement

1 Crush and screen reclaimed asphalt pavement (RAP) greater than 2 in [50 mm] so that all material is prepared for recycling and a uniform mixture is maintained. Handle, screen, and crush material so as not to produce unnecessary fractured aggregate or cause undue degradation. Ensure that 100 percent of RAP used for recycled plant mix pavement passes through a 2 in [50 mm] sieve. Stockpile in its own pile.

803.5.4 Recycled Plant Mix Pavement

1 Ensure that the combined virgin aggregate gradation meets the narrow band specification developed during the mix design.

803.5.5 Gradation and Properties

1 Size, grade, and combine aggregate fractions for the mixture, including RAP when specified, in proportions such that the resulting composite blend meets the requirements of Table 803.5.5-1, Gradation Requirements: Marshall and Superpave Mixes.

Table 803.5.5-1 Gradation Requirements: Marshall and Superpave Mixes Sieve % Passing, Nominal Maximum Size 1 in [25 mm] ¾ in [19 mm] ½ in [12.5 mm] ⅜ in [9.5 mm] 1¼ in [31.5 mm] 100 – – – 1 in [25.0 mm] 90 to 100 100 – – ¾ in [19.0 mm] 65 to 90 90 to 100 100 – ½ in [12.5 mm] 50 to 85 55 to 90 90 to 100 100 ⅜ in [9.5 mm] 40 to 75 45 to 85 55 to 90 90 to 100 No. 4 [4.75 mm] 30 to 60 30 to 65 35 to 70 45 to 85 No. 8 [2.36 mm] 20 to 45 20 to 50 20 to 55 30 to 65 No. 30 [600 µm] 5 to 25 5 to 30 5 to 35 10 to 40 No. 200 [75 µm] 2 to 7 2 to 7 2 to 7 2 to 7

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2 For specific types of aggregate, provide in accordance with Table 803.5.5-2, Aggregate Properties: Flexible Pavements.

Table 803.5.5-2 Aggregate Properties: Flexible Pavements

Property Aggregate Type I II III IV V LA abrasion loss, max., % 35 40 40 40 40 Flat and elongated (1:5 ratio), max., % 10 10 10 10 – Sand equivalent, min.(2), % 45 45 45 40 40 Fractured faces, min.(1), % 95/90 95/90 85/80 75/– 55/– Fine aggregate angularity, min.(2), % 45 45 45 40 40 Plastic index(2) NP NP NP NP NP Soundness (MgSO)(3) loss, max., % 18 18 18 18 18 (1) “95/90” denotes that 95 percent of the coarse aggregate has one or more fractured faces and 90 percent has two or more fractured faces.

803.6Aggregate for Plant Mix Wearing Course

803.6.1 General

1 For plant mix wearing course, use crushed stone or gravel for aggregate in accordance with the requirements for aggregate type I in Table 803.5.5-2, Aggregate Properties: Flexible Pavements, and Table 803.6.1-1, Gradation Requirements: Plant Mix Wearing Course.

2 When specified, provide aggregate in accordance with Subsection 803.6.2, Polish Resistant Aggregate.

Table 803.6.1-1 Gradation Requirements: Plant Mix Wearing Course Sieve % Passing ½ in [12.5 mm] 100 ⅜ in [9.5 mm] 97 to 100 No. 4 [4.75 mm] 25 to 45 No. 8 [2.36 mm] 10 to 25 No. 200 [75 µm] 2 to 7

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803.6.2 Polish Resistant Aggregate

1 Provide aggregate that is in accordance with one of the test methods in Table 803.6.2- 1, Polish Resistant Aggregate Requirements.

Table 803.6.2-1 Polish Resistant Aggregate Requirements Test Method Description Specification AASHTO T 279 9 hour (Polish Value), min. 32 AASHTO T 242 Skid Number, min.(1) 40

pavement that has carried traffic exceeding 3,500,000 accumulated 18-kip equivalent single axle loads.

803.7Aggregate for Microsurfacing

1 Use 100 percent crushed stone or gravel of which 95 percent is retained on a ½-inch [12.5 mm] sieve before crushing. Ensure a sand equivalent of at least 65 percent, a maximum soundness (MgSO) loss of 20 percent on the coarse aggregate, and an LA abrasion loss of no more than 30 percent; supply the test results. Submit the job mix formula in accordance with Subsection 401.4.13, Composition of Plant Mix; ensure accordance with Table 803.7-1, Gradation Requirements: Microsurfacing.

Table 803.7-1 Gradation Requirements: Microsurfacing Sieve % Passing ⅜ in. [9.5 mm] 100 No. 4 [4.75 mm] 70 to 90 No. 8 [2.36 mm] 45 to 70 No. 16 [1.18 mm] 28 to 50 No. 30 [0.60 mm] 19 to 34 No. 50 [0.30 mm] 12 to 25 No. 100 [150 µm] 7 to 18 No. 200 [75 µm] 5 to 15

2 When specified, provide aggregate in accordance w ith Subsection 803.6.2, Polish Resistant Aggregate.

803.8Aggregate for Chip Seal

1 For chip seal, provide and use crushed stone or gravel, which before crushing at least 95 percent retained on ½ -inch [12.5 mm] sieve, and of aggregate types that are wel l graded from coarse to fine in accordance with Table 803.8- 1, Gradation Requirements: Chip Seal, and Table 803.8-2, Aggregate properties: Chip Seal.

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Table 803.8-1 Gradation Requirements: Chip Seal Sieve % Passing Type B C 1 in [25.0 mm] – – ¾ in [19.0 mm] 100 – ½ in [12.5 mm] 95 to 100 100 ⅜ in [9.5 mm] 40 to 70 80 to 100 No. 4 [4.75 mm] 0 to 15 0 to 10 No. 8 [2.36 mm] 0 to 7 0 to 5 No. 200 [75 μm] 0 to 2 0 to 2

Table 803.8-2 Aggregate Properties: Chip Seal Property Test Method Specification LA Abrasion loss, max., % AASHTO T96 35 Flat and elongated (1:5 ratio), max.(1), % ASTM D4791 (Method A) 10 Fractured Faces, min.(2), % AASHTO T335 95/90 Plasticity Index(3) AASHTO T90 NP Polish Resistance When specified, comply with Table 803.6.2-1

or more fractured faces and 90 percent has two or more fractured faces.

803.9Aggregate for Blotter

1 For blotter material, provide aggregate with a plasticity index of 3 or less and in accordance with Table 803.9-1, Gradation Requirements: Blotter.

Table 803.9-1 Gradation Requirements: Blotter Sieve % Passing ⅜ in [9.5 mm] 100 No. 4 [4.75 mm] 85 to 100 No. 200 [75 µm] 0 to 20

2 For chip seal applications, provide blotter aggregate with the same color as the chip seal aggregate.

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803.10Aggregate for Bed Course Material

1 Provide aggregate in accordance with Table 803.1 0-1, Gradation requirements: Bed Course Material.

Table 803.10-1 Gradation Requirements: Bed Course Material Sieve % Passing 1 ½ in [37.5 mm] 100 1 in [25.0 mm] 75 to 100 No. 4 [4.75 mm] 20 to 80 No. 200 [75 µm] 0 to 12 Maximum PI 6

803.11Gravel for Drains

1 Provide and use aggregate that is crushed or natural sand and gravel or other free- draining material approved by the engineer and that meets the requirements of Table

1, Gradation Requirements: Gravel For Drains

Table 803.11-1 Gradation Requirements: Gravel for Drains

Sieve % Passing Grading B 2 in [50 mm] – 1½ in [37.5 mm] 100 1 in [25.0 mm] 95 to 100 ¾ in [19.0 mm] – ⅜ in [9.5 mm] – No. 4 [4.75 mm] 0 to 10 No. 8 [2.36 mm] – No. 16 [1.18 mm] – No. 100 [150 µm] –

803.12Aggregate for Maintenance Stockpiles

.1 Type A

1 Provide and stockpile aggregate consisting of clean, hard, durable particles of crushed gravel or stone having a percentage of wear of no more than 40. For a maximum nominal size of ½ in [12.5 mm], ensure that 95 percent of the material is retained on a ½ inch

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[12.5 mm] sieve before crushing. For a maximum nominal size of ⅜ in [9.50 mm], ensure that 95 percent is retained on a ⅜ inch [9.50 mm] sieve before crushing. Ensure that the material meets the requirements of Table 803.12.1-1, Gradation Requirements: Maintenance Stockpiles (Type A). For the fraction passing the No. 4 [4.75 mm] sieve, ensure a liquid limit no greater than 25 and a plasticity index no greater than 3.

Table 803.12.1-1 Gradation Requirements: Maintenance Stockpiles (Type A) Sieve % Passing ½ in [12.5 mm] ⅜ in [9.50 mm] ¾ in [19.0 mm] 100 – ½ in [12.5 mm] 90 to 100 100 ⅜ in [9.50 mm] 60 to 90 90 to 100 No. 4 [4.75 mm] 45 to 65 50 to 80 No. 8 [2.36 mm] 30 to 50 33 to 63 No. 200 [75 µm] 3 to 12 3 to 12

.2 Type B

1 Provide and stockpile aggregate consisting of clean, hard, durable particles of crusher- run gravel or screened stone obtained from designated portions of the pit. Ensure that the material has a plasticity index no greater than 3 and meets the requirements of Table

.2-1, Gradation Requirements: Maintenance Stockpiles (Type B)

Table 803.12.2-1 Gradation Requirements: Maintenance Stockpiles (Type B) Sieve % Passing ¾ in [19 mm] ½ in [12.5mm] ⅜ in [9.50 mm] No. 4 [4.75 mm] No. 4 [4.75 mm] Modified 1 in [25.0 mm] 100 – – – – ¾ in [19.0 mm] 95 to 100 100 – – – ½ in [12.5 mm] – 95 to 100 100 – – ⅜ in [9.50 mm] – – 95 to 100 100 100 No. 4 [4.75 mm] 0 to 75 0 to 75 0 to 75 95 to 100 95 to 100 No. 200 [75 µm] 0 to 15 0 to 15 0 to 15 0 to 5 0 to 12

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.3 Type C

1 Provide and stockpile aggregate consisting of crusher-run scoria meeting the requirements of Table 803.12.3-1, Gradation Requirements: Maintenance Stockpiles (Type C).

Table 803.12.3-1 Gradation Requirements: Sodium Chloride (Type C) Sieve % Passing ⅜ in [9.5 mm] 100 No. 4 [4.75 mm] 85 to 100 No. 200 [75 µm] 0 to 10

.4 Sodium Chloride for Maintenance Stockpiles

1 Provide and stockpile type 1, sodium chloride meeting the requirements of AASHTO M 143 (ASTM D 632). Ensure that gradation samples taken after delivery meet the requirements of Table 803.12.4-1, Gradation Requirements: Sodium Chloride.

Table 803.12.4-1 Gradation Requirements: Sodium Chloride Sieve % Passing ½ in [12.5 mm] 100 ⅜ in [9.50 mm] 95 to 100 No. 4 [4.75 mm] 20 to 95 No. 8 [2.36 mm] 10 to 75 No. 30 [0.60 mm] 19 to 34

2 Provide and stockpile sodium chloride to which the producer has added yellow prussiate of soda (YPS) or other chemical additive approved by the engineer, at a rate of not less than 200 ppm. Ensure that the sodium chloride is delivered to the mixing site in bags or other containers acceptable to the engineer or in bulk lots and that the manufacturer’s name and the net weight [mass] is marked on each bag or container, or in the case of bulk lots, on the shipping or delivery invoice.

803.13Aggregate for Pervious Backfill Material

1 Provide and use nonplastic aggregate consisting of crushed gravel, crushed rock, manufactured sands, or combinations thereof. Ensure the material has a liquid limit no greater than 30 and meets the requirements of Table 803.13-1, Gradation Requirements: Pervious Backfill Material.

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Table 803.13-1 Gradation Requirements: Pervious Backfill Material Sieve % Passing 2 in [50 mm] 100 No. 4 [4.75 mm] 0 to 50 No. 30 [0.60 mm] 0 to 35 No. 100 [150 mm] 0 to 10 No. 200 [75µm] 0 to 4

2 Ensure that the materials provided and used have an internal friction angle of at least 35 degrees.

803.14Aggregate for Riprap

.1 General

1 Use aggregate consisting of hard, durable, crushed, quarried, or natural stone or broken concrete. Ensure an apparent specific gravity of at least 2.4, absorption no greater than 4 percent, that the pieces are free of weak laminations and cleavages, and are roughly square or rectangular in shape and of the class specified. Do not provide material that will disintegrate in water or weather.

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Table 803.14-1 Gradation Requirements: Minimum and Maximum Aggregate Size

Class Nominal Size in [mm] d15(1) d50(2) d85(3) d100(4) Min in [mm] Max in [mm] Min in [mm] Max in [mm] Min in [mm] Max in [mm] Max in [mm] I 6 [150] 3.7 [92] 5.2 [130] 5.7 [142] 6.9 [172] 7.8 [195] 9.2 [230] 12 [300] II 9 [225] 5.5 [137] 7.8 [195] 8.5 [212] 10.5 [262] 11.5 [287] 14 [350] 18 [450] III 12 [300] 7.3 [182] 10.5 [262] 11.5 [287] 14 [350] 15.5 [387] 18.5 [462] 24 [600] IV 15 [375] 9.2 [230] 13 [325] 14.5 [362] 17.5 [437] 19.5 [487] 23 [575] 30 [750] V 18 [450] 11 [275] 15.5 [387] 17 [425] 20.5 [512] 23.5 [587] 27.5 [687] 36 [900] VI 21 [525] 13 [325] 18.5 [462] 20 [500] 24 [600] 27.5 [687] 32.5 [812] 42 [1050] VII 24 [600] 14.5 [362] 21 [525] 23 [575] 27.5 [687] 31 [775] 37 [925] 48 [1200] VIII 30 [750] 18.5 [462] 26 [650] 28.5 [712] 34.5 [862] 39 [975] 46 [1150] 60 [1500]

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Table 803.14-2 Gradation Requirements: Minimum and Maximum Aggregate Weight Class Nominal Weight lbs [kg] W15(1) W50(2) W85(3) W100(4) Min lbs [kg] Max lbs [kg] Min lbs [kg] Max lbs [kg] Min lbs [kg] Max lbs [kg] Max lbs [kg] I 20 [9] 4 [1] 12 [5] 15 [6] 27 [12] 39 [17] 64 [29] 140 [63] II 60 [27] 13 [5] 39 [17] 51 [23] 90 [40] 130 [58] 220 [99] 470 [213] III 150 [68] 32 [14] 93 [42] 120 [54] 210 [95] 310 [140] 510 [231] 1100 [498] IV 300 [136] 62 [28] 180 [81] 240 [108] 420 [190] 600 [272] 1000 [453]

[997] V 500 [226] 110 [49]

[140] 410 [185] 720 [326]

[476]

[793]

[1723] VI 750 [340] 170 [77]

[226] 650 [294] 1150 [521]

[748]

[1270]

[2721] VII 1000 [453]

[117]

[335] 950 [430] 1700 [771]

[1134]

[1859]

[4082] VIII 2000 [907]

[226]

[657]

[861]

[1496]

[2177]

[3628] 17600 [7983] (1)15% of the aggregate will be smaller than min weight shown.

.2 Hand-Placed Riprap

1 Provide and use stones to meet the requirements of Table 803. 14-1, Gradation Requirements: Minimum and Maximum Aggregate Size, and Table 803.14-2, Gradation Requirements: Minimum and Maximum Aggregate Weight. Use choke stones consisting of fragments or spalls to fill the voids between the riprap stones.

.3 Machine-Placed Riprap

1 Provide and use stones to meet the requirements of Table 803. 14-1, Gradation Requirements: Minimum and Maximum Aggregate Size, and Table 803.14-2, Gradation Requirements: Minimum and Maximum Aggregate Weight. Ensure gradations contain enough smaller stones uniformly distributed throughout to stabilize the installation.

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.4 Grouted Riprap

1 Provide and use stone in accordance with the requirements for hand-placed or machine- placed riprap.

.5 Stone-Filled Gabions

1 Provide and use round or angular stones which meet the requirements of Table

.5-1, Gradation Requirements: Stone-Filled Gabions

Table 803.14.5-1 Gradation Requirements: Stone-Filled Gabions Sieve % Passing 10 in [250 mm] 100 7 in [175 mm] 50 5 in [ 125 mm] 5

.6 Stone Mattress

1 Provide and use round or angular stones of which at least 95 percent are retained on a screen or wire with 3 in [75 mm] square openings.

.7 Filter Aggregate for Riprap

1 Provide and use aggregate consisting of hard, durable particles or fragments of crushed stone or natural gravel, screened or crushed to meet the requirements of Table 803.14.7- 1, Gradation Requirements: Riprap Filter Aggregate.

Table 803.14.7-1 Gradation Requirements: Riprap Filter Aggregate Sieve % Passing 3 in [75 mm] 100 No. 4 [4.75 mm] 20 to 50 No. 200 [75µm] 0 to 10

803.15Aggregate for Flowable Backfill

1 Provide and use nonplastic aggregate with a liquid limit no greater than 25 and meeting the requirements of Table 803.15-1, Gradation Requirements: Flowable Backfill.

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Table 803.15-1 Gradation Requirements: Pervious Backfill Material Sieve % Passing ¾ [150 mm] 100 No. 200 [75µm] 2 to 10