Construction aggregate, or simply quotaggregatequot, is a broad category of coarse to medium 10 mm graded crushed basalt rock or aggregate, for use in concrete, called quotblue metalquot in Australia. 20 mm graded aggregate. A gravel and sand
fine aggregate components produced by the crushing, scalping and screening of a rock feed source, Newer Basalt Surface. Spalls NBSS and/or fine aggregate shall be the portion of the crushed rock mixture passing the 4.75 mm AS.