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Jun 30 2019 · AIM To find Aggregate Crushing value of the given aggregate sample APPARATUS Steel cylinder cylindrical measure Steel temping rod Balance Compressions testing machine PROCEDURE The aggregate passing 125 mm sieve and retained on 10 mm IS sieve is
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An aggregate specimen is compacted into a steel cylinder fitted with a nofriction plunger The specimen is then loaded via the plunger The load crushes the aggregate to an extent depending on the crushing resistance of the material It is measured by a sieving test on the crushed specimen and it is a measure of the aggregate crushing value ACV
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Calculation of aggregate crushing value The aggregate crushing value is defined as the ratio of the weight of fines passing through specified IS here 236mm sieve
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21 Object This method of test covers the procedure for determining aggregate 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
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The procedure of Aggregate Crushing Value Test Take the Empty weight of cylindrical measure as W1 Fill aggregate sample passing through 125 mm and retained on 10 mm IS sieve in measuring cylinder in 3 equal layers such that each layer is Find out the weight of aggregate sample W W2 – W1
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The aggregate crushing value ACV of an aggregate is the mass of material expressed as a percentage of the test sample which is crushed finer than a 236 mm sieve when a sample of aggregate passing the 132 mm and retained on the 950 mm sieve is subjected to crushing under a gradually applied compressive load of 400 kN 2 APPARATUS 21 An openended steel cylinder of 150 mm nominal
WhatsApp Jul 14 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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The plunger should be placed centrally and rest directly on the aggregates In the operation of sieving the aggregates through 236 mm sieve and weighting care should be taken to avoid loss The tamping should be done properly by gently dropping the tamping rod and not by hammering action
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The aggregate crushing value ACV of an aggregate is the mass of material expressed as a percentage of the test sample which is crushed finer than a 236 mm sieve when a sample of aggregate passing the 132 mm and retained on the 950 mm sieve is subjected to crushing under a gradually applied compressive load of 400 kN
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1 To determine the aggregate crushing value of coarse aggregates 2 To assess suitability of aggregates for use in different types of road pavement 2 PRINCIPLE The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load
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Jun 30 2019 · Indian Roads Congress and ISI have specified that the aggregate crushing value of the coarse aggregates used for cement pavement at surface should not exceed 30 percent For aggregates used for concrete other than for wearing surfaces the aggregate crushing value shall not exceed 45 percent according to the ISS
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Procedure of Aggregate Impact value test The test sample normally aggregates sized 100 mm to 125 mm the aggregates should be dried by heating at 100110 0C for a period of 4 hours and cooled Sieve the material through 125mm and 100 mm IS sieves
WhatsApp The apparatus of the aggregate impact value test consists of A testing machine weighing 45 to 60 kg and having a metal base with a plane lower surface of not less than 30 cm in diameter Level and plane concrete floor of minimum 45 cm thickness are used to support it
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The aggregate crushing value test indicates the strength of aggregate which is the most essential property of coarse aggregate The aggregate crushing value provides a relative measure of resistance to crushing under a gradually applied compressive load For achieving a high quality of pavement aggregate of higher crushing strength ie low crushing value should be preferred Lower crushing
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aggregate crushing value provides a relative measure of the resistance of an aggregate to crushing The standard test is made on dry aggregate passing a 132 mm AS sieve and retained on a 950 mm AS sieve and is performed in duplicate
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Revision History and Document Control The Manual of Aggregate Quality Test Procedures will be reviewed by the Aggregate Technology Coordinator for adequacy and updated as necessary to reflect the current policies and technology changes Updates are made to the electronic file as needed and hard copies are uncontrolled
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Jan 04 2014 · Procedure of testing Aggregate Crushing Value ACV 1 Make a sieve analysis and get sufficient amount of aggregate by using 140 mm passing sieve 2 After sieving fill the cylinder in thre layers by the aggregate and apply 25 blows by 3 Dry the material at a temperature of 110 degree
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Procedure to determine Aggregate Crushing Value i The aggregates passing through 125mm and retained on 10mm IS Sieve are ovendried 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
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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 Fig1
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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
WhatsApp Principle of the Test To produce the abrasive action by use of standard steel balls which when mixed with the aggregate and rotated in a drum for specific number of revolution cause impact on aggregate The age wear due to rubbing with steel balls is determined and is known as abrasion value
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aggregate 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
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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 o f Aggregate Impact Test The test sample consists of aggregates sized 100 mm 125 mm Aggregates may be dried by heating at 100110° C for a period of 4 hours and cooled
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Note 1 A procedure for testing coarse aggregate larger than 190 mm 3 4 in is covered in Test Method C535 Thus coarse aggregates with a maximum size between 19 mm 3 4 in and 375 mm 1 1 2 in may be tested by Test Method C535 or Test Method C131C131M
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