Specifications include, but are not limited to: 1. CRUSHED STONE CLASS "D" - Abrasion: % wear AASHO T96 shall not exceed 45. Soundness: Freeze and thawing loss shall not exceed 15% Gradation: 1" - 100% passing. 3/4" 95 - 100% passing. 1/2" 60 - 90% passing. #4 30 - 50% passing. #8 15 - 40% passing. #200 6 - 16% passing. Mudballs: None. 2. All crushed stone shall be certified by the contractor to meet the above specification as per procedures adopted by the Iowa Department of Transportation. 3. Each 1,500 tons of stone produced for Dubuque County shall be inspected at the point of production by the producer. All tests shall be performed by the producer's aggregate inspector who has been certified by the Iowa Department of Transportation as qualified to perform the necessary tests...
