HOW TO DO SPECIFIC GRAVITY & WATER ABSORPTION TEST ON AGGREGATES?
The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. The specific gravity test helps in the identification of stone. Water absorption gives an idea of strength of aggregate. The specific gravity of aggregates normally used in construction ranges from about 2.5 to 3.0 with an average value of about 2.68. Specific gravity of aggregates is considered as an indication of strength. Material having higher Specific Gravity is generally considered as having higher strength. Depending upon the size of the aggregate the method of testing shall be adopted to determine the specific gravity and water absorption values. Pycnometer can be used for sizes less than 10mm and wire basket for more than 10mm sized aggregates.