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Aggregate Impact Value. The test sample shall consist of aggregates the whole of which passes through ½ in B.S. test sieve and is retained on a 3/8 in B.S. test sieve. The aggregate comprising the test sample shall be dried in an oven for a period of four hours at a temperature of 100-110 °C and cooled.The measuring cup shall be filled about ...
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Determination of Aggregate Impact Value – Impact Test on … Procedure of Aggregate Impact Test. The test sample consists of aggregates sized 10.0 mm 12.5 mm. Aggregates may be dried by heating at 100-110° C for a period of 4 hours …
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Aggregate impact value of a sample also depends on the shape factors such as flakiness index and elongation index of the aggregates. It has been found that for majority of aggregates, the aggregate crushing value and aggregate impact values are numerically similar within close limits.
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Calculate the Aggregate Impact Value by dividing the weight of the fraction passing through the sieve by the total weight of the sample, and multiplying by 100. Round the result to the nearest whole number, and report …
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The percentage of fines passing through a 2.36mm sieve was calculated to determine the aggregate impact value. Sample 1 had a 17% impact value and Sample 2 was 15%, both below the JKR requirement of 20%, …
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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.
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Table 1: Classification of aggregate based on aggregate impact value Aggregate impact value (%) Quality of aggregate < 10 Exceptionally strong 10 – 20 Strong 20 – 30 Satisfactory for road surfacing >35 Weak for road surfacing Table 2: Maximum allowable impact values of aggregate in different types of Pavement material/ layers Sl.No Types of ...
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Aggregate impact value of a sample also depends on the shape factors such as flakiness index and elongation index of the aggregates. It has been found that for majority of aggregates, the aggregate crushing value and …
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DETERMINATION OF AGGREGATE IMPACT VALUE (AIV) (BS 812-112) Scope: This Part of BS 812 describes methods for the determination of the aggregate impact value (AIV) which gives a relative measure of the resistance of an aggregate to sudden shock or impact. Principle A test specimen is compacted, in a standardized manner, into an open steel cup.
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Aggregate Impact Value (percent) = (W2 / W1) × 100; Take the mean of two observations, rounded to the nearest whole number, as the Aggregate Impact Value. Observations and Results. The observations in the Impact Test are recorded, including the total weight of the dry sample (W1 gm), weight of portion passing the 2.36 mm sieve (W2 gm), and …
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The data from the Aggregate Impact Value Test is analyzed by comparing the Impact Value of the sample to established standards for road construction aggregates. If the Impact Value exceeds the established limit, the aggregate may not be suitable for use in road construction.
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Procedure of Aggregate Impact value test. The test sample: normally aggregates sized 10.0 mm to 12.5 mm. the aggregates should be dried by heating at 100-110 0C for a period of 4 hours and cooled. Sieve the …
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Aggregate physical property must lower Aggregate Impact Value, AIV because is tougher and resistance to crushed. We can conclude that the aggregate been used are medium toughand resistant to be crash.
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Crushing test and Impact test are very important to estimate strength and toughness characteristics of the road aggregate. Extensive experimental procedures and different sets of equipment are ...
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Determination of Aggregate Impact Value - Impact Test on Aggregates is done to carry out to: Determine the impact value of the road aggregates, Assess their suitability in road construction on the basis of impact value.
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Aggregates used in road construction, should be strong enough to resist crushing under traffic wheel loads if the aggregates are weak, the stability of the pavement structure is likely to be adversely affected. The strength of coarse aggregates …
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The Aggregate Impact Test, as per IS 2386 (Part IV), measures the resistance of aggregates to sudden impact or shock loading. ... The test involves subjecting an aggregate sample to standard impact by dropping a hammer from a fixed height. ... Conclusion. By conducting a comprehensive fine aggregate test list and coarse aggregate tests, civil ...
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The apparatus as per IS 2386 (Part-IV) 1993 consist of,. Impact Testing Machine : A testing machine weighing 45 to 60 Kg and having a metal base with a heavy lower surface of not less than 30 centimetre in diameter. It is supported on plane and level concrete floor of minimum 45 cm thickness. The machine should have provision for fixing its base.
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Why do we use aggregate impact value test? 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.
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Aggregate impact value (AIV) is the percentage of fines produced from the aggregate sample after subjecting it to a standard amount of impact. It is the percentage loss of weight of particles passing 2 sieve by the application on load by mean of 15 blows of standard hammer and drop under specified test condition.
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Aggregate Impact Test - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document contains the table of contents for a lab report on determining the aggregate impact value of road construction materials. It …
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The aggregate impact test is carried out to evaluate the resistance to impact of aggregates. Aggregates passing 12.5 mm sieve and retained on 10 mm sieve is filled in a cylindrical steel cup of internal dia 10.2 mm and depth 5 cm which is attached to a metal base of impact testing machine.
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The experiment pursues to decide the effect cost of aggregates, especially coarse aggregates, with the use of the Aggregate Impact Testing Machine. It specializes in evaluating the resistance of aggregates to surprising shocks and effects.
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The data from the Aggregate Impact Value Test is analyzed by comparing the Impact Value of the sample to established standards for road construction aggregates. If the Impact Value exceeds the established limit, the …
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The 'Aggregate Impact Value' is the mean of two observations, rounded to the nearest whole number. Place the plunger centrally so that it falls directly on the aggregate sample and does not touch the wall of the cylinder in …
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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. The level and plane concrete floor of a minimum of …
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Calculate the Aggregate Impact Value by dividing the weight of the fraction passing through the sieve by the total weight of the sample, and multiplying by 100. Round the result to the nearest whole number, and report the mean of …
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A relative measure of the resistance of aggregate due to the sudden shock or impact on it is called aggregate impact value. Based on the impact value, we can decide whether the coarse aggregate is suitable for construction or not.
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"Aggregate crushing value is determined by taking a percentage of weight crushed aggregate sample passing through 2.36 mm IS Sieve divided by weight of aggregate sample taken for test" The aggregate crushing value formula is given below, Aggregate crushing value = (W3 / W) or W3 / (W2 – W1) W1 = Empty weight of cylindrical Measure. W2 ...
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The aggregate impact value test is done to test the compressive strength of aggregatewhen 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 …
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Impact test of aggregate is peformed to check impact resistance of stone aggregates. Impact testing machine is used to perform this test. ... The hammer is then allowed to fall freely on the sample 15 times. The sample is then sieved through a 2.36 mm sieve. ... Conclusion. This was aggregate impact test. You should do this test practically in ...
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