Write short notes on abrasion test, Civil Engineering

Assignment Help:

Q. Write short notes on Abrasion Test?

The abrasion test for ballast shall be carried out using Los-Angeles machine.The abrasive charge shall consist of 12 nos. cast iron or steel spheres approx. 48mm dia and each weighing between 390 and 445 gm ensuring total weight of charge as 5,000 ± 25 gm.

The test sample of 10000gm shall consist of clean ballast conforming to the following grading :- Passing 50mm and retained on 40 mm square mesh sieve 5,000 gm and Passing 40 mm and retained on 25mm square mesh sieve 5,000 gm tolerance of ± 2% permitted.

The sample shall be dried in oven at 100 - 110 °C to a constant weight and weighed (Weight 'A')

The test sample and the abrasive charge shall be placed in the Los-Angeles abrasion testing machine and the machine rotated at a speed of 20 - 33 revolutions/minute for 1000 revolutions. At the completion of test, the material shall be discharged and sieved through 1.70mm IS sieve.

The material coarser than 1.70 mm IS sieve shall be washed, dried in oven at 100-110°C to a constant weight and weighed (weight B).

The proportion of loss between Weight "A" and Weight "B" of the test sample shall be expressed as a percentage of the original weight of the test sample. This value shall be reported as: Aggregate Abrasion Value =((A-B)/A)X100.


Related Discussions:- Write short notes on abrasion test

Simply supported beam, draw the shear force and bending moments of a beam

draw the shear force and bending moments of a beam

Define recommendations for ptfe, Define Recommendations for PTFE? (a) I...

Define Recommendations for PTFE? (a) It can be either of the two forms given below: (i) Dimpled large sheet It may be circular or rectangular divided maximum into four pa

Define chlorides - underwater inspection of bridge, Define Chlorides - unde...

Define Chlorides - underwater inspection of bridge? Chlorides do not attack plain concrete when present in the concentrations that normally exist in seawater, but may greatly a

BOLTED CONNECTIONS, compare riveted joints with welded joints

compare riveted joints with welded joints

Turbines, How do we get electricity even when the gates of a dam were close...

How do we get electricity even when the gates of a dam were closed?

Building Technology, which IS code give details about Strength of Brick?

which IS code give details about Strength of Brick?

Define fatigue load test of shock transmission unit, Define Fatigue load te...

Define Fatigue load test of shock transmission unit? This test was carried out for 100,000 cycles for maximum capacity of STU, assuming the worst case that the 'Lock Up Load' i

Shear Iosipescu Test, First Can I use this device to test concrete specimen...

First Can I use this device to test concrete specimen? Second it is very important for me that wouldn’t have tensile strength when I want to fix specimens. Because the specimens su

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd