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Aggregate impact value test Aggregate impact value is measure of toughness of aggregate Toughness is the property of material which indicate its capacity which impact in sudden Tougher the aggregate more suitable for wearing surface such as road surface Lower the impact value stronger the aggregate again the impact these for good quality
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Used to determine the impact value of aggregates and select them for a given application The device has a trip action hammer release blow counter device and a built in operator safety device Home > Aggregate > Rock Testing > Aggregate Impact Value Aggregate Impact Value Products Description Product Options Part Number Name Price
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The Aggregates Impact Value AIV Apparatus is used to determine the aggregate impact value which provides a relative measure of the resistance of an aggregate to sudden shock or impact The counter fitted to the machine automatically records the number of blows delivered to the sample AIV is made from steel protected against corrosion
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Figure 1 impact testing machine Standard IS 2386 Apparatus Aggregates sample Oven Sieves of IS standards based on the aggregates size Measuring cylinder Aggregate impact value Classification <20% Excellent 10 20% Good 20 30% Fair for surfacing >35% Weak for surfacing
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conclusion aggregate impact value test CGM mining application Aggregate Impact Value AGGREGATE IMPACT VALUE This test is done to determine the aggregate impact value of coarse … and 230mm length rounded at one end and Oven
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This test gives the Aggregate Impact Value AIV which is an index of the resistance of aggregate to sudden shock or impact The apparatus used for this test is called Impact Testing Machine A sample of aggregates in surface dry condition which pass through mm sieve and are retained on 10 mm sieve are taken for this test W1
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The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock Fig 2 Sieves Seives required are and mm Fig 3 Impact Testing machine Weight of hammer is to kg and Height of Fall is 380±5 mm IS 2386 Part 4 1963 Methods of Test for Aggregates for Concrete
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Explanation Aggregate Crushing Value ACV This test is used to find the strength of the coarse aggregate and indicates the resistance to crushing under a gradually applied crushing load It is measured as the percentage of aggregates passing through mm IS sieve after the specimen subjected to a compressive load of 40 tonnes at the rate of 4 tonnes per minute and to the weight of
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The aggregate impact value test is done to test the compressive strength of aggregate when sudden and immediate impact force acted on it It is expressed in percentage % It should be less for high impact bearing aggregate for pavement In this post I will show you the details of the aggregate impact value test
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The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact which in some aggregate differs from its resistance to a slow compressive load The test sample consists of aggregate the whole of which passes a mm sieve and is retained on a 10 mm sieve
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Aggregate Impact Value AIV Testing Apparatus Standards BS 812 112 The Aggregate Impact Value Testing Apparatus meets with BS 812 it is robustly designed to determine the Aggregate Impact Value AIV of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact
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Aggregate impact value is used to classify the stones in respect of their toughness property as indicated below <10% Exceptionally strong 10 20% Strong 20 30% Satisfactory for road surfacing 35% Weak for road surfacing The aggregate impact value should not normally exceed 30% for aggregate to be used in wearing course of pavements
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Aggregate Impact Value Calculations The ratio of the weight of fines formed to the total sample weight in each test shall be expressed as a percentage the result being recorded to the first decimal place Aggregate Impact Value Aggregate Impact Value = B/A 100 where A = weight of oven dried sample Aggregate Impact Value
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OBJECTIVE For determination of the aggregate impact value of coarse aggregate which passes mm IS sieve and retained on 10 mm IS sieve Aggregate impact value test gives an indication of
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Observations and Calculations Calculate the aggregate impact value AIV expressed as a percentage to the first decimal place for each test specimen from the following equation 𝑀2 𝐴𝐼𝑉 = × 100 𝑀1 Where M 1 is the mass of the test specimen in g M 2 is the mass of the material passing the mm test sieve in g
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This characteristic of aggregate is measured by impact value test Table below shows the classification of aggregate with respect to aggregate impact value and limits of aggregate impact value for different types of road construction suggested by Indian Road Congress Aggregate Impact Value Classification <20%
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The procedure of Aggregate Crushing Value Test 1 Put the filled cylinder on the horizontal and level base plate and weigh it W1 2 Inserted the plunger horizontally on the surface Care should be taken that the plunger should not jam in the cylinder 3 Place the cylinder with a plunger on the compression testing machine 4
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Aggregate Impact Value = W B W A ×100 W B W A × 100 Where W A is Weight of oven dried sample W B is Weight of fraction passing through mm IS Sieve Reporting of Results The mean of the two results shall be reported to the nearest whole number as the aggregate impact value of the tested material Specifications Aggregate Impact Values
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Basically the aggregates impact value is aggregate which provides a relative measure of the resistance of an aggregate to sudden shock or impact However it can be explain as the aggregate crushing value which is defined as a ratio of the weight of fines passing the specified sieve to the total weight of the sample expressed as a percentage
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The aggregate impact value is expressed as the percentage of the fines formed the total weight of the sample Aggregate Impact Value AIV = 100 M2 /M1 Where M1 =Mass of the test specimen M2 = Mass of the test specimen passing mm test sieve
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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 what is the difference between aggregate crushing value and aggregate impact value Reply
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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 1963 IS Sieves of sizes 10mm and 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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Procedure of Aggregate Impact value test The test sample normally aggregates sized mm to mm the aggregates should be dried by heating at 100 110 0C for a period of 4 hours and cooled Sieve the material through and mm IS sieves The aggregates passing through mm sieve comprises the test material
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i The cup of the impact testing machine should be fixed firmly in position on the base of the machine and the whole of the test sample placed in it and compacted by 25 strokes of the tamping rod ii The hammer should be raised to 380mm above the upper surface of the aggregates in the cup and allowed to fall freely onto the aggregates
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Procedure of Aggregate Impact Test The test sample consists of aggregates sized mm mm Aggregates may be dried by heating at 100 110° C for a period of 4 hours and cooled i Sieve the material through mm and IS sieves The aggregates passing through sieve and retained on sieve comprises the test material
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Aggregate Impact Value Test Apparatus is used for determining the aggregate impact value The Sturdy Construction consists of a base and support columns to form a rigid framework around the quick release trigger mechanism to ensure an effective free fall of the hammer during test The free fall can be adjusted through 380±5mm
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aggregate impact value test ।।aggregate impact value test ।। apparatusAGGREGATE IMPACT VALUE TEST MACHINEIS SIEVES 10 AND MMWEIGHT MACHINE
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The aggregate impact value is a determining measure of resistance to sudden impact or shock which may differ from its resistance to gradually applied compressive load Aim To determine Aggregate Impact Value Using Impact Testing Machine Apparatus Impact Testing Machine Weight of hammer is to kg and Height of Fall is
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In this test we will find out the percentage of the weight of the aggregate sample which gets crushed with respect to the total weight of the sample This percentage is known as the aggregate impact value and more the aggregate impact value less is the toughness of the road aggregates and vice verse
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