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January 2021

Rock Bolt / Anchor (Elements) in situ Pull Out Test 54

The rock anchors are of various types and are manufactured by different agencies. The anchor pull-out test is done to get assistance in design and acceptance after installation. The types of tests and methods of testing are discussed with special emphasis on the rebar anchors, widely used in construction of tunnels, caverns and rock slope stabilisation

Test for Abrasion of Coarse Aggregates Using Los Angeles Machine 52

In Los Angeles test for finding abrasion value of the aggregates, the aggregates and abrasive charge are placed together in a drum. The drum is rotated to 500 revolution or 1000 revolution depending upon the gradings of aggregate.
The fines generated during this action after passed through 1.72 mm sieve. The amounts passing through is used for getting an inference about the abrasion value and the use of the aggregates.