Rock – Unwashed, 3/4” or 1” Maximum

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Used for various backfill and bedding applications as well as underneath concrete slabs or ground cover for gravel driveways, this angular and durable rock meets a core need on many construction projects.

Sieve Results

Sieve Size% Passing
ASTM D4791 | Ratio=5:1
37.5 mm (1-1/2")100
25.0 mm (1")100
19.0 mm (3/4")99
12.5 mm (1/2")68
9.5 mm (3/8")52
4.75 mm (No.4")10
2.36 mm (No. 8)5
0.300 mm (No.50)3
0.150 mm (No.100)3
0.075 mm (No.200)2.3

Test Results

Physical Properties
C 29T19Unit WeightUnit Weight, lbs./cu.ft.94
D4318T89/90Liquid/Plastic LimitLiquid Limit0
Plastic Limit0
Plasticity IndexNP
C131T96L.A. AbrasionSmall Coarse Loss20%
C 127T85Coarse Specific Gravity & AbsorptionBulk Specific Gravity (dry)2.535
Bulk Specific Gravity, SSD2.570
Apparent Specific Gravity2.626
C 88T104SoundnessCoarse Soundness Loss1.1%
Sodium No. of Cycles5
Fine Soundness Loss%
Magnesium No. of Cycles%
C40T21Organic ImpuritiesCoarse Aggregate0.0%
C142T112Clay / Friable ParticlesCoarse Aggregate0.0%
Fine Aggregate%
C123T113Lightweight PiecesCoarse Aggregate0.0%
Fine Aggregate%
D5821 Fractured Face1 or 2 Faces1 = 100
Fractured Face, %2 = 100
D2487 Soil ClassificationGroup SymbolGP
Group NamePoorly Graded Gravel

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