Road Project Engineering Materials Shen Aiqin Edition Review - Aggregate & Cement English EditionAssignment for Road Engineering Materials Chapter 1 & Chapter 2Name： Class ：

n and weighed. The cylindrical measure is filled with 3 layers of aggregate. Each layer is tamped 25 times with the help of a tamping rod. The weight of the aggregate is noted.ii)The cylinder is placed in a compression testing machine and a loading force is applied on the aggregates to crush them.iii)The percentage of fines generated as a result of crushing is measured and compared with the original weight of the sample to determine the aggregate crushing value (ACV).The difference between strength indexes of stone and aggregate is that stone is a single, solid material while aggregate is a mixture of different materials. The strength index for stone is based on its ability to withstand pressure while the strength index for aggregate is based on its ability to resist crushing and breaking under pressure. The test methods used to measure these strength indexes are also different