The effect of grading and shape on the bulk density of concrete aggregates

Abstract

Summary Laboratory tests have shown that variation of grading within the limits permitted by the British Standard 882:1944 for concrete aggregates results in differences of as much as 12 lb/cu.ft. in the compacted bulk density of coarse aggregates, and 13 lb/cu.ft. in Class A and 31 lb/cu.ft. in Class B fine aggregates. It was also found that the bulk densities of different gradings of a rounded aggregate were between 5 and 10 per cent higher than those of the corresponding gradings of an angular aggregate with the same specific gravity.