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Aug 11, 2020· Theaverage crushing value in the different tests is the actual crushing value of aggregate. Important points to remember. It isrecommended that the crushing value of aggregate should be less than 30%. If it is more than 30 % then10% finer aggregate is suggested to use. The aggregate whose crushing value is less than 30% can be used for cement concrete road. The …[email protected]
First, fill the sample aggregate with one-third of the cylindrical measure in three layers Each layer should be tamped 25times freely. After filling the sample aggregate, weigh and record it as W1. Now fill the aggregate in the mould along with the plunger on top. Thenplace the cylinderon the ...
Calculation of Aggregate Crushing Value: Aggregate crushing value can be found by the following formula, “Aggregate crushing value is determined by taking a percentage of weight crushed aggregate sample passing through 2.36 mm IS Sieve divided by weight of aggregate sample taken for test” Aggregate crushing value= (W3 / W) or W3 / (W2 – W1)
Apr 28, 2016· Aggregate Crushing value is a measure of the strength of the aggregate. The strength of concrete largely depends upon the strength of aggregate. The aggregate should therefore have minimum crushing value. The aggregate crushing value provides arelative measure of the resistance of an aggregate to crushing under gradually applied crushing load.
Procedure to determine Aggregate Crushing Value i) Theaggregates passing through 12.5mmand retained on 10mm IS Sieve are oven-dried at a temperature of 100 to 110 o C for 3 to 4hrs. ii) The cylinder of the apparatus is filled in 3 layers, each layer tamped with 25 strokes of a tamping rod.
Aggregate crushing valueis defined as the percentage by weight of thecrushed(or finer) material obtained when thetest aggregatesare subjected to a specified load under standardized conditions, and the strength of theaggregateused in road construction is expressed by numerical index.
Apr 26, 2018· The aggregate crushing value is defined as the ratio of the weight of fines passing through specified IS (here 2.36mm sieve) to the total weight of sample expressed in percentage. W1= Weigh of the total aggregates (Wa-We) W2= Weigh of aggregates passing through 2.36mm IS sieve. Aggregate crushing value= (W2 / W1) × 100
The aggregate crushing value (ACV) provides relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Two versions available: 150 (standard) and 75 mm dia. The apparatus comprehend cylinder, plunger, base plate, tamping rod and measure.
May 22, 2020· Procedure for finding the crushing value of aggregate. Aggregate passing through a12.5mm I.S. sieve and retained on 10mm I.S. sieve is taken. About 6.5 kg material is taken. The aggregate in a surface dry condition is filled into the standard cylindrical measure in three layers approximately of equal depth.
Procedure:- The impact machine is rest on the horizontal flat surface like the level plate, block, or floor without any packing. So,... The cup is fixed in a proper position on the base of the impact machine. Transfer aggregate sample from cylindrical measure to cut fitted in an impact test machine ...
May 27, 2020· aggregate Crushing value=( B/A)*100. Where B is Termed as the weight of fraction passing 2.36 mm IS sieve . A is Termed as the weight of surface dried sample taken in a mold. The aggregate crushing value should not be more than 45% by weight.
BS 812 part 110 describes a method to determine the aggregate crushing value (ACV) which gives a relative measure of the crushing resistance of aggregate under an increasing compressive load. The method is applicable to aggregates passing a 14.0 mm test sieve and retained on a 10.0 mm test sieve.
Aggregate Crushing Value = W B W A ×100 W B W A × 100. Where, W A is weight of surface-dry sample. W B is weight of fraction passing the appropriate sieve. Reporting of Results. The mean of the two results shall be reported to the nearest whole number as the ‘aggregate crushing value’ …
May 08, 2013· For determination of the aggregate crushing value of coarse aggregate, which passes 12.5 mm. IS sieve and retained on 10 mm. IS sieve.
The Aggregate Crushing Value (ACV) Test Set measures how resistant an aggregate is, when being crushed under a gradually applied compressive load. Each set consists of steel cylinder, plunger, base plate, cylindrical measure and tamping rod.
Original weight of aggregate sample = W 1 g. Weight of aggregate sample retained = W 2 g. Weight passing 1.7mm IS sieve = W 1 – W 2 g. Abrasion Value = (W 1 – W 2 ) / W 1 X 100. Results
Sep 12, 2015· The aggregate crushing value provides a relative measure of resistance to crushing under gradually applied crushing load. The test consists of subjecting the specimen of aggregate in standard mould to a compression test under standard load conditions (See Fig-1).
Aggregate Crushing Value Test Procedure and Result. The procedure of Aggregate Crushing Value Test: Aggregate Crushing Value Mould. Take the Empty weight of cylindrical measure as W1. Fill aggregate sample passing through 12.5 mm and retained on 10 mm IS sieve in measuring cylinder in 3 equal layers such that each layer is subjected to 25 strokes using the tamping rod. Aggregate Crushing Value Test …
The test aims at looking for the forces required to produce 10% of fine values (i.e. weight of fines aggregates/weight of all aggregates = 10%). This test is very similar to Aggregate Crushing Test in which a standard force 400kN is applied and fines material expressed as a percentage of the original mass is the aggregate crushing value.
Obtain the material that passes through 25 mm sieve and is retained on 12.5 mm sieve. Dry, clean and heat the binder and aggregates to 150-175 oC and 120-150 oC respectively and mix with 5 per cent binder by weight of aggregate. After complete coating, allow the mixture to …
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