. "ASTM International ??? ASTM D698 ??? 12 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort ??? 1.1.1 Soils and soil-aggregate mixtures are to be regarded as natural occurring fine- or coarse-grained soils, or composites or mixtures of natural soils, or mixtures of natural and processed soils or aggregates such as gravel or crushed rock. www.perlite.net Ty" . . .