Abrasion test - tests on stones, Civil Engineering

Abrasion Test:  

This test is carried out on stones used as aggregates for road construction. The test result shows the suitability of stones against   the grinding action under traffic. Any 1 of the following test can be conducted to find out the suitability of aggregates:

A.   Los Angeles abrasion test

B.   Deval abrasion test

C.   Dorry's abrasion test.

Los Angeles abrasion test is preferred as these test results are with good correlation with the performance of the pavements.

The Los Angeles apparatus consists of a hollow cylinder 0.7 m inside diameter and 0.5 m long having both ends closed. It is mounted on a frame so that it may be rotated about horizontal axis. IS code has standardized the test process for different gradation of specimen. With specified weight of specimen a specified number of cast iron balls of 48 mm diameter are placed in the cylinder.

914_los angeles testing machine.png

           Los Angeles testing machine

Then the cylinder is rotated at a speed of 30 to 33 rpm for particular number of times (500 to 1000). Then the aggregate is removed & sieved on 1.7 mm. IS sieve. The weight of aggregate passing is found. Then Los Angeles value is calculated as

1986_los angeles testing machine1.png

The following values are recommended for road works:

For bituminous mixes = 30%

For base course = 50%

Posted Date: 10/16/2012 2:04:38 AM | Location : United States







Related Discussions:- Abrasion test - tests on stones, Assignment Help, Ask Question on Abrasion test - tests on stones, Get Answer, Expert's Help, Abrasion test - tests on stones Discussions

Write discussion on Abrasion test - tests on stones
Your posts are moderated
Related Questions
A clay stratum of 18 metres thickness was found above a sand stratum when a boring was made. The clay was consolidated under the present overburden pressure. The hydrostatic pressu

what are lab and field test carried on soil subgrade?

A masonry retaining wall is 1.5 m wide at the top, 3.5 m wide at the base and 6 m high. It is trapezoidal in section and has a vertical face on the earth side. The backfill is leve

Q. Explain Tension and compression anchorage length? Tension anchorage length vs. compression anchorage length Tension anchorage length of steel reinforcement in concrete

A clay layer 5 m thick has double drainage. It was consolidated under a load of 127.5 kN/m2. The load is enhanced to 197.5 kN/m 2 . The coefficient of volume compressibility is 5.7


Plant Location and Facility Layout: This unit explain the general definition of Plant location and facility layout. Several factors affecting the location decision of a firm o

design a tension member subjected to a pull of 300KN using a channel section. the length of a joint available is only 400mm.check the condition of using lug angle for end connecti

Road Pavements: Pavements constitute an important part of road as they withstand the traffic loads and transmit them to the earthen embankment. A study of the types of pavemen

what is all about building administration?