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Permeable Pavers

Permeable pavers help prevent water runoff and promote charging aquifiers. Graniterock fully supports the "Green" movement so that the end users can earn LEED points by using locally produced aggregates that achieve desired results.

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Sub-Base Aggregate - 1 1/2" Ballast ASTM Stone Size #4

Sieve Size Average % Passing
2" (50 mm) 100
1 1/2" (37.5mm) 98
1 (15 mm) 42
3/4" (19 mm) 7
3/8" (9.5 mm) 2.5

Base Aggregate - Wilson Crushed 3/4" x 1/2" ASTM Stone Size #57

Seive Size Average % Passing
1" (15 mm) 100
3/4" (19 mm) 87
1/2" (12.5 mm) 28
3/8" (9.5 mm) 9
No. 4 (4.75 mm) 2.8

Bedding Aggregate - 3/8" x #6 Screenings ASTM Stone Size #8

Sieve Size Average % Passing
1/2" (12.5 mm) 100
3/8" (9.5 mm) 100
No. 4 (4.75 mm) 11
No. 8 (2.36 mm) 2
No. 16 (1.16 mm) 1.1

Joint Mill Material - 1/4" x #10 Screenings ASTM Stone Size #89

Sieve Size Average % Passing
1/2" (12.5 mm) 100
3/8" (9.5 mm) 100
No. 4 (4.75 mm) 60
No. 8 (2.36 mm) 5
No. 16 (1.16 mm) 2

Additional Specifications from the Interlocking Concrete Paver Institute

ICPI Graniterock
Crushed stone with 90% fractured faces Yes
LA Abrasion < 40 per ASTM C 131 Yes
Minimum CBR of 80% per ASTM D 1883 Yes
Washed aggregate with less than 1% passing the #200 Sieve Ranges between 1% - 2%
Aggregate gradation conforming to ASTM 448 Yes

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