IMPACT VALUE TEST OF COARSE AGGREGATE
IMPACT VALUE TEST OF COARSE AGGREGATE AIM: To determine the Impact Value of the coarse aggregate . APPARATUS: 1. Sieve size of 12.5mm , 10mm, 2.36mm 2. Aggregate Impact tester 3. Weighing balance 4. Measuring Cylinder 5. Tamping rod 6. Oven PROCEDURE: 1. Take the sample of aggregate collected from IS Sieve passing 12.5mm and retained on 10mm. 2. Dry the aggregate at 100 - 1100 C in oven for not exceeding 4 hours and then cool it. 3. The cylindrical steel cup is filled with 3 equal layers of aggregate and each layer is tamped 25 strokes by the rounded end of tamping rod. 4. The net weight of aggregate in the cylindrical steel cup is determined and noted as WA. 5. The impact machine shall rest without wedging or packing upon the level plate, block or floor, so that it is rigid and hammer guide columns are vertical. 6. The cup i...