Test Sieves Coarse Aggregate: Test sieves is a common laboratory requirement. Sieves are used for sieving of chemical powders, medical powders, aggregate, sand soil and cement etc. These sieves are manufactured as per various standards like ISS, BSS, ASTM, DIN etc. Sieves are commonly used for gradation and particle size determination. these are mainly made of brass frame and g. I. Frame of dia. 200mm, 300mm & 450mm.