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

Define truss analysis-stability, Define Truss analysis-stability   ...

Define Truss analysis-stability   Identify whether a truss is determinate or indeterminate. Identify if the truss is stable or unstable   m = number of membe

Category of bars reinforcement are more corrosion resistant, Question Which...

Question Which category of bars reinforcement are more corrosion resistant , epoxy-coated bars, stainless steel bars, galvanized bars? Answer Supported on experiment conducte

Applied physics, Write the principle of reversibility of light.

Write the principle of reversibility of light.

Determine the term - lowering of stresses, Determine the term -  lowering ...

Determine the term -  lowering of stresses Due to creep of concrete, these compressive strains keep on increasing with time. it means that the length of the member keeps on red

Explain the signalized intersections - transportation, Explain the Signaliz...

Explain the Signalized Intersections Cycle length - the time required for one complete sequence of all signal indications Phase - the right-of-way (green), change (yellow),

Torsion, what is torsional moment of resistance

what is torsional moment of resistance

Ranging, describe reciprocal ranging

describe reciprocal ranging

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