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The crushed aggregate is removed from the test specimen and sieve it through the 236 mm IS sieve An impact value is measured as of aggregates passed through the 236mm sieve W2 to the total weight of the sample W1 Aggregate impact value The value of aggregate impact test
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Purpose of the test Impact testing is used to determine material behavior at higher deformation speeds Classical pendulum impact testers determine the impact energy absorbed by a standardized specimen up to break by measuring the height of rise of the pendulum hammer after impact
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Jul 16 2014 · Aggregate impact value test gives an indication of aggregate''s toughness property ie property of a material to resist impact Aggregate impact values are used to classify the stone aggregates with respect to toughness property as given below Aggregate impact value Toughness Properties 10 Exceptionally tough Strong 10 – 20 Very tough Strong
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The aggregates should therefore have sufficient toughness to resist their disintegration due to impact This characteristic is measured by impact value test The aggregate impact value is a measure of resistance to sudden impact or shock which may differ from its resistance to gradually applied compressive load Procedure of Aggregate Impact Test
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Feb 08 2012 · Impact test may either be carried out on cylindrical stone specimens as in Page Impact test or on stone 1aggregates as in Aggregate Impact test The Page Impact test is not carried out nowadays and has also omitted from the revised British Standards for testing mineral aggregates
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The apparatus used for determining aggregate impact value of coarse aggregates is Impact testing machine conforming to IS 2386 Part IV 1963IS Sieves of sizes – 125mm 10mm and 236mm A cylindrical metal measure of 75mm dia and 50mm depth A tamping rod of 10mm circular cross section and 230mm length rounded at one end and Oven
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Aggregate Impact Value Test Specifications Aggregate Impact Value The test sample shall consist of aggregates the whole of which passes through ½ in BS test sieve and is retained on a 38 in BS test sieve The aggregate comprising the test sample shall be dried in an oven for a period of four hours at a temperature of 100110 °C and
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Jan 09 2018 · The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact which in some aggregates differs from Its resistance to a slow compression load The Indian Standard CODE IS 2386 Part IV – 1963 is used for procedure and classification of aggregate by result
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Sep 12 2015 · Impact Test Fig3 Impact Test Setup The aggregate impact test is carried out to evaluate the resistance to impact of aggregates Aggregates passing 125 mm sieve and retained on 10 mm sieve is filled in a cylindrical steel cup of internal dia 102 mm and depth 5 cm which is attached to a metal base of impact testing machine
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