Soundness test is intended to study the resistance of aggregates to weathering action.Abrasion test is carried out to test the hardness property of stones. Road stones used in the surface course are subjected to wearing action at top due to movement of traffic.Deval attrition test is carried out by deval machine without using abrasive charge. So mutually rubbing of mass takes place inside the machine.The crushing test gives aggregate crushing value which provides a relative measure of resistance to crushing under gradually applied compressive load.