Impact Test: Explain the impact value test for aggregate

Impact Test

Procedure

Impact Test is the resistance of stones to collision is found by organizing tests in collision testing machine It comprises of a frame with an escort in which a metal hammer consider 13.5 – 15 kg can freely drop from a height of 380 millimeters.

Aggregates of size 10 millimeter to 12.5millimeter are filled in the cylinder in 3 identical layers; each layer being  tamp down 25 times. The same is then transferred to the cup and again tamp down 25 times.

The hammer is then allowed to fall frankly on the specimen 15 flow. The specimen is then sieved between a 2.36 mm sieve. afterward,

for bituminous McAdam >/ 35 percent

for water leap McAdam >/ 40 percent

The formula of the Impact test

what is the procedure of impact test for aggregates?

Impact Test is the resistance of stones to collision is found by organizing tests in collision testing machine It comprises of a frame with an escort in which a metal hammer consider 13.5 – 15 kg can freely drop from a height of 380 millimeters.
Aggregates of size 10 millimeter to 12.5millimeter are filled in the cylinder in 3 identical layers; each layer being tamped down 25 times. The same is then transferred to the cup and again tamp down 25 times.
The hammer is then allowed to fall frankly on the specimen 15 flow. The specimen is then sieved between a 2.36 mm sieve. afterward,
for bituminous McAdam >/ 35 percent
for water leap McAdam >/ 40 percent

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