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What is Aggregate Toughness and Impact Testing about?

This test is designed to evaluate the toughness of stone by measuring the resistance offered to fracture under impact. The test involves compacting a sample of aggregate into a metal cylinder, subjecting it to 15 blows from a falling hammer, then sieving and weighing the sample to determine the percentage that fractures into pieces smaller than 2.36mm. The aggregate impact value should not exceed 30% for aggregates used in wearing courses or 45% for other concrete applications.

Author

Pavan Burra

Language

EN