AIM: To determine the coefficient of hardness or resistance to wear of stone aggregate
APPARATUS: LOS Angeles machine, Deval attrition test machine, sieves, weighing balance, charges
THEORETICAL BACKGROUND: The aggregate used in pavements is subjected to huge amounts of wear and tear. Hence it is imported to know the hardness and resistance offered by the material.
PROCEDURE:
APPARATUS: LOS Angeles machine, Deval attrition test machine, sieves, weighing balance, charges
THEORETICAL BACKGROUND: The aggregate used in pavements is subjected to huge amounts of wear and tear. Hence it is imported to know the hardness and resistance offered by the material.
PROCEDURE:
- Take 5 kg of dried aggregates and 6 steel charges introduce them into two different cylinders.
- Rotate the machine at 30 to 33 rpm for 10,000 revolution
- After completion of revolutions discharges the material from the machine.
- Sieve the remains through 1.7 mm is sieve
- Wash and dry the material coarser than 1.7 mm and weigh it.
