The ‘ aggregate crushing value test ` gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under standardized conditions, and the strength of the aggregate used in road
Aug 11, 2020· 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 30 % then 10% finer aggregate is suggested to use. The aggregate whose crushing value is less than 30% can be used for cement concrete road. The
For this reason assessment of strength of the aggregate is made by using a sample of bulk aggregate in a standardized manner. This testing method is known as an aggregate crushing value test. Aggregate crushing value test provides the resistance of an aggregate sample to crushing under gradually applied compressive load.
Apr 26, 2018· Procedure for crushing strength of aggregate. Before testing, the aggregate should be in surface dry condition.You can achieve the dry condition of aggregate by placing aggregates in an oven for 4 hours at 100-degree Celcius. The aggregates passing through 12.5mm and retained on 10mm IS sieves are selected for finding aggregate crushing strength.
Nov 07, 2020· AGGREGATE CRUSHING STRENGTH TEST Theory and Scope: This is one of the major Mechanical properties required in a road stone. The test evaluates the ability of the Aggregates used in road construction to withstand the stresses induced by moving vehicles in the form of crushing.
Significance of Aggregate Crushing Value Test. The crushing value test is conducted on aggregates that are used for the construction of roads. Lower crushing value aggregates give much more durability for roads due to its lower crushed fraction under the compression load.
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Aggregate crushing value test is done the find the actual crushing value of aggregate. We Need to carry out this test, To find out how much resistance does the aggregate has against the surface abrasion under traffic. To find out how much resistance does the aggregate can withstand under the roller during construction. To determine the strength
For this reason assessment of strength of the aggregate is made by using a sample of bulk aggregate in a standardized manner. This testing method is known as an aggregate crushing value test. Aggregate crushing value test provides the resistance of an aggregate sample to crushing under gradually applied compressive load.
Significance of Aggregate Crushing Value Test. The crushing value test is conducted on aggregates that are used for the construction of roads. Lower crushing value aggregates give much more durability for roads due to its lower crushed fraction under the compression load. The road is subjected to motion pressure continuously.
Nov 11, 2020· (ii) Aggregate crushing value (ACV) test on aggregate ACV test (prescribed by BS 812: Part 110) provides useful information pertaining to the strength of aggregate The aggregate to be tested should pass a 1 / 2 in. sieve and should be retained on 3 / 8 in. sieve
Sep 09, 2018· This video (Animation, Animated Video) explains How to determine aggregate crushing value (Aggregate Crushing Strength). Aggregate test || Coarse aggregate T...
AGGREGATE CRUSHING VALUE 1.Objective The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. With aggregate of aggregate crushing value 30 or higher, the result may be anomalous, and in such cases the ten percent fines value should be determined instead.
AGGREGATE CRUSHING VALUE This test helps to determine the aggregate crushing value of coarse aggregates as per IS: 2386 (Part IV) 1963. The apparatus used is Cylindrical measure and plunger, Compression testing machine, IS Sieves of sizes 12.5mm, 10mm and 2.36mm
Aggregate Crushing Value Test -Determine Aggregate. 2010-5-5 · Coarse aggregate crushing value is the percentage by weight of the crushed material obtained when test aggregates are subjected to a specified load under standardized conditions. Aggregate crushing value is a numerical index of the strength of the aggregate and get price
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The aggregate shall be taken as in the case of crushing strength value test i.e., the aggregate should pass through 12.5 mm I.S. sieve and retained on 10 mm I.S. sieve. It should be oven dried at 100°C to 110°C for four hours and then air cooled before test.
This test gives the Aggregates Crushing Value (ACV), which is an index of crushing strength of aggregates. The apparatus used for this test is Compression Testing Machine / Universal Testing Machine. A sample of aggregates in surface dry condition, which pass through the 12.5 mm sieve and are retained on 10 mm sieve are taken for this test (W1).
The aggregate crushing value provides a relative measure of the resistance of an aggregate to crushing under gradually applied crushing load. The aggregate crushing value test is a useful guide when dealing with aggregates of unknown performance, particularly when lower strength is suspected.
To conduct crushing strength test we need compression testing machine, cylindrical measure, plunger and Isa sieves. First sieve the sample aggregate, aggregate passing 12.5mm sieve and retaining 10mm sieve is oven dries at 100-110 o C for 3-4 hrs.
The specimen so placed in the compression testing machine is loaded in the rate of 14 N/mm 2 per minute. The crushing load is noted. Then crushing strength is equal to this crushing load divided by the area where the load is applied. At least three specimens must be tested, and the average ought to be taken as crushing strength.