Crushed Aggregate Base Coarse (Compaction Gravel) shall consist of one or more courses or layers of coarse aggregate, either crushed gravel or crushed stone, ... 3 Aggregate Properties Density is the weight per unit of volume of a substance. ... compacted or consolidated.
Impervious Gravel vs. Porous Aggregate Paving Systems. Posted September 12, 2014 by Patricia Stelter. Written by William G. Handlos, For two decades, I held the position of City Engineer and frequently had to explain to disbelieving homeowners, developers and elected officials – that gravel driveways and parking lots were not porous.