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aggregate crushing value test is done the find the actual crushing value of aggregate. or on a sieve shaker. the aggregate passing through 12.5 mm IS sieve and the crushed material is then transferred into the sieve of size 2.36 mm.
determination OF aggregate crushing value aim To determine the aggregate crushing value of coarse aggregates sieve the material through 12.5 mm and 10.0 mm IS sieve. the aggregates passing the mean of the two results shall be reported to the nearest whole number as the aggregate crushing value of the size of the material
jan 04, 2014 test name: methods for determination of aggregate crushing value code: BS 812 part 110, IS 2386. definition of acv: aggregate crushing value gives an relative measure how the aggregate act under an gradually acting compressive load. sieve size: acv is applicable for aggregates passing 14.0 mm sieve and retained on 10.00 mm sieve. for other size fractions
sampling for aggregate crushing value test: for the aggregate crushing value test, an aggregate sample passing through 12.5 mm IS sieve and retained on IS sieve is selected and dried to a temperature of 105 to 110 then cooled to room temperature.
the standard aggregate impact test shall be made on aggregate passing a 14.0 mm BS test sieve and retained on mm BS test sieve. If required, or if the standard size is not available, smaller sizes may be tested but owing to the non-homogeneity of aggregates the results are not likely to be the same as those obtained from the standard size.
the average crushing value in the different tests is the actual crushing value of aggregate. important points to remember. It is recommended that the crushing value of aggregate should be less than 30%. If it is more than then 10% finer aggregate is suggested to use. the aggregate whose crushing value is less than 30% can be used for
aug 31, 2020 larger value of FM is preferred for fine aggregates. for a good fine aggregate, the FM should be between 2.3 and 3.1 FM of can be interpreted to means that the fourth sieve from bottom i.e. sieve no. is the average size of the aggregate particles in the given sample. limitations of sieve analysis:
To calculate aggregate crushing value by testing aggregate passing 12.5 mm sieve and retained on a mm sieve. scope: and through 2.36 mm each sieve shall be shaken at least for two minutes on a clean tray until no more trace passes. the motion shall be varied like back and forth, left to right
fineness modulus of fine aggregate is an index number which represents the mean size of the particles in sand. It is calculated by performing sieve analysis with standard sieves. the cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fineness modulus.
sep 05, 2018 aggregate crushing value weight of fraction passing through the appropriate sieve weight of surface dry sample. the aggregate crushing value shall not exceed 30% 54.
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