BS 812 111 Testing aggregates Part 111 Methods for determination of ten per cent fines value TFV Published by BSI on June 29 1990 Methods which give a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load
know moreProcedure of Aggregate Crushing Value Test Sieve the test material through mm and mm IS sieve Take test samples of aggregates passing through mm IS sieve and retained on 10 mm IS sieve minimum 3 Kg Dry theme in an oven for 4 hours at a temperature of 100 °C to 110 °C and then cool at room temperature
know moreAggregate Crushing Value and Its Test Procedure One of the test in which concrete material can fail is due to crushing under compressive stress Aggregate crushing test is standardized by IS 2386 part IV and used to verify the crushing strength of aggregates The aggregates should be oven dried which can passes through and retained on 10mm sieve The cylindrical steel cup is stuffed
know moreThe Aggregate Crushing Value offers a related measure of the resistance of an average to crushing under a compressive load that is gradually applied Test Method IS 9376 1979 IS 2386 P 4 1963 Drying Shrinkage Drying shrinkage is defined as the contracting of a hardened concrete mixture due to the loss of capillary water This shrinkage causes an increase in tensile stress which may
know moreAGGREGATE 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 10mm and Procedure to determine Aggregate Crushing Value i The aggregates passing through []
know more4 The procedure of Stripping Value Test on Aggregates6 Precautions Taken in Stripping Value Test 1 Distilled water must be used for the stripping value test 2 The bituminous binder and the aggregate must be mixed thoroughly 3 The aggregate must be properly dried before it is mixed with bitumen 4 Apparatus must be handled with care Read More Core Cutter Method Read
know moreProcedure of Aggregate Crushing Value Take a sample of aggregates by sieving through and retained on 10mm ; The aggregate shall be tested in dry surface dried by heating the period of drying shall not exceed 4 hours and temp shall be 100 110 deg C
know moreIf the aggregate crushing value is less than 10 it signifies an exceptionally strong aggregate Whereas if the crushing value is 35 or above it would normally be considered as weak aggregate After performing the test the crushed material is separated and calculated in terms of percentage of the original weight taken in the mould
know moreThe aggregate crushing value= B/A 100 Where B is weight of fraction passing sieve ; A is weight of surface dry sample taken in mould Note The aggregate crushing value should not be more than 45% for aggregate used for concrete other than the wearing surfaces 30% for concrete used the surfaces such as runway roads and air field
know moreSTEP 3 Place the set of sieves in the mechanical shaker and allow to shake for 10 minutes STEP 4 Collect the coarse aggregate retained on 10mm sieve in a separate container STEP 5 Note down the weight of the empty cylinder as W 1 g Then fill the cylinder with the aggregates retained on 10mm sieve in 3 layers
know moreprecaution of aggregate crushing value testing aggregate crushing value precautions Aggregate crushing value test safety precaution N the test on soaked sample serves as a precaution to allow for aggregates having impact value 986 and crushing value as precaution of aggregate crushing value testing mining industry leader quarry crushing precautionssuppliers of stone quarry mach
know moreaggregate Crushing value= B/A 100 Where B is Termed as the weight of fraction passing 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
know moreThe aggregates which may be used in concrete must be free from silt clay and other marine impurities 12 Crushing value of aggregate Determination of the crushing value of an aggregate is helpful to find the compressive strength of the aggregate whether it is suitable for the concrete work or not
know moreAggregates may be broadly classi fied as natural or artificial both with respect to source and to method of preparation Natural sands and gravels are the product of weathering and the action of wind or water while manufactured crushed fine aggregate and crushed stone coarse and fine aggregate are produced by crushing natural stone
know moreaggregate Crushing value= B/A 100 Where B is Termed as the weight of fraction passing 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 For aggregates used for concrete other than wearing surfaces and 30% by weight for concrete to be used
know moreAggregate crushing value test Step by Step Procedure withHow to perform Aggregate crushing value test Apparatus required sieves of sizes mm mm and cylinder with open end and dimension of cm internal diameter plunger that would fit the steel cylinder base plate 5
know moreIf the aggregate crushing value is less than 10 it signifies an exceptionally strong aggregate Whereas if the crushing value is 35 or above it would normally be considered as weak aggregate After performing the test the crushed material is separated and calculated in terms of percentage of the original weight taken in the mould This percentage is known as a crushing value
know moreThe crushed aggregate is allowed to pass through mm IS sieve And the impact value is measured as percentage of aggregates passing sieve W2 to the total weight of the sample W1 Aggregate impact value = W1/W2 100 Aggregates to be used for wearing course the impact value shouldn t exceed 30 percent
know morethe aggregate crushing value ACV which gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load The method is applicable to aggregates passing a mm test sieve and retained on a mm test sieve For other size fractions there is another recommended method
know moreAggregate Crushing Value and Its Test Procedure One of the test in which concrete material can fail is due to crushing under compressive stress Aggregate crushing test is standardized by IS 2386 part IV and used to verify the crushing strength of
know moreAggregate crushed value ACV determined in accordance with TMH1 method B1 shall not exceed the appropriate value in the 3602/3 DURABILITY The material shall comply with the requirements in columns 3 4 and 5 of table 3602/2
know moreAggregate crushing value is measured which relatively gives idea of his resistance to crushing under the compressive load applied gradually Lower the crushing value stronger the aggregate again crushing Therefore good quality
know moreThe machine should be driven to produce 30 33 rpm Fig LOS ANGELES Machine APPARATUS 1 LOSS ANGELES Abrasion Machine 2 Coarse Sieve Shaker 3 Weighing balance 4 Sieve #12 5 Abrasive Charges m= g PROCEDURE 1 Sieve the sample in the coarse sieve shaker 2 Clean the aggregates and dry them in an oven at 105 110°C to
know moreaggregate crushing value of coarse aggregate NOTE 1 The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load With aggre gate 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 NOTE 2 The
know moreThe Aggregate Crushing Value offers a related measure of the resistance of an average to crushing under a compressive load that is gradually applied Test Method IS 9376 1979 IS 2386 P 4 1963 Drying Shrinkage Drying shrinkage is defined as the contracting of a hardened concrete mixture due to the loss of capillary water
know moreProcedure of Aggregate Crushing Value Take a sample of aggregates by sieving through and retained on 10mm The aggregate shall be tested in dry surface conditions If dried by heating the period of drying shall not exceed 4 hours and temp shall be 100 110 deg C A sample shall be cooled down to room temperature before testing Take approximately 6 kgs of a sample The quantity of the
know moreAggregate crushing value ACV should not be exceed 30 % for concrete used for wearing surface such as road runways and aggregate crushing value should not exceed 45 % for other than wearing surfaces such as road runways and used for any concrete work Application The purpose of the test is to have an idea of compressive strength relatively its resistance relatively under
know moreAggregate crushing value pdf BS 812 part 110 describes a method for determining the aggregate crushing value LCA that gives a relative measurement of aggregate crushing resistance under a growing compressive load The method applies to aggregates that pass a mm test sieving and are preserved in a mm test sieve
know moreAggregate Crushing test IS 2386 Part 4 1963 & BS 812 110 1990 Aggregate crushing test values indicates the strength of aggregate and hence it is very significant Similarly we can say crushing value is the relative measure of resistance of an aggregate under gradually applied compressive loads
know moreIS 9376 1979 1 SCOPE This standard covers requirements of the apparatus for measuring aggregate crushing value and ten percent fines value Two sizes of apparatus are covered in this standard one with 150 mm cylindrical cell and the other with 75 mm cylindrical cell 2
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