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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 aggregates differs from its resistance to a slow compressive load. ... and allowed to fall freely on to the aggregate. The test sample shall be subjected to a total of 15 such blows each being delivered at an interval ...
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The aggregate impact value test is an important test of aggregates. It is done to obtain the resistance and impact of aggregates (stones). In this test a machine is used, which is called impact testing machine.
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Learn how to conduct the aggregate impact value test to measure the resistance of coarse aggregate used in road construction. See the …
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The general test procedure of the aggregate impact value test is briefly described below: Objectives of Impact Test. 1. To assess the suitability of the aggregate to be used in the highway pavement. 2. To determine the aggregate impact value. Apparatus Required. 1. An impact testing machine weighing between 45kgs to 60 kgs with a …
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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 13.5 to 14.0 kg …
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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: Where (𝐴𝐼𝑉) = 𝑀2 × 100 𝑀1 M 1 is the mass of the test specimen (in g); M 2 is the mass of the material passing the 2.36 mm test sieve (in g ...
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Read More: Aggregate Testing | 7 Test On Aggregates | Coarse Aggregate Test. Aggregate Crushing Value Test Result. For accurate test results conduct the test at least 3 times and take an average of 3 values. Aggregate Crushing Value Test Lab Report. Aggregate Crushing Value Limits for Road Pavement
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The Aggregate impact value indicates a relative measure of resistance of aggregate to impact load which has different effect than the resistance to gradually increasing compressive stress. A test designed to evaluate the toughness of stones or the resistance of the aggregates to fracture under repeated impacts is called impact…
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Recommended Aggregate Impact Test Values. Aggregate Impact value Nature <20%: Exceptionally strong: 10-20%: Strong: 20-30%: Satisfy for surface course >35%: Weak for surface course Maximum Allowable Impact Value of Aggregate for Different Types of Pavements. Sr. No. Types of Pavements:
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The method of aggregate test specifies the procedure for determining the aggregate impact value of coarse aggregate. 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 ...
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If the total weight (B+C) is less than the initial weight (A), the result shall be discarded and a fresh test made. Aggregate Impact Value (AIV) = B/A x 100. Where B = weight of aggregate passing through 2.36 mm sieve. A = …
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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. ... Aggregate impact value = (W1/W2)*100. …
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Aggregate Impact Test: The aggregate impact test is used to evaluate the toughness of aggregates, the toughness of aggregate means the resistance to fracture from impact load or sudden dynamic load. The test is carried out on stone aggregates in a machine known as an impact testing machine. The test is carried out as follows:
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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 12.5, 10.0 and 2.36 mm Fig. 3: Impact Testing machine Weight of hammer is 13.5 to 14.0 kg and Height of Fall is 380±5 mm 3.Reference IS 2386(Part 4):1963 Methods of Test for Aggregates for Concrete ...
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test shall be expressed as percentage of the oven dried, the result being recorded to the first decimal place: C Aggregate impact value = A X ]00 where C 11IOII weight of the fines formed, and A = weight of the oven-driedsample. 6. REPORTING OF RESULTS 6.1 The mean of the two results shall be reported as aggregate impact value (wet)ofthe tested ...
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The document describes an experiment to determine the aggregate impact value of a given specimen through a standardized test procedure. Three samples were tested by subjecting aggregates retained between 10mm and 12.5mm sieves to 15 blows from a falling hammer.
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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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Concept: Aggregate Impact Test: It is conducted to determine the toughness of the aggregates. For testing, the specimen passing through 12.5 mm sieve but retained on 10 mm sieve is filled in 3 layers with 25 time stamping on each layer and then hammer of 13.5 to 14 kg is dropped freely from a height of 38 cm for 15 blows.. …
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The impact value test has been conducted on aggregate to determine its bearing capacity against sudden impact. Here we are going to discuss the crushing value of aggregates. Contents of the Article show
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Learn how to perform the aggregate impact value test, a measure of the resistance of an aggregate to sudden shock or impact. Find the objective, apparatus, procedure, …
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Aggregate impact test. IS : 2386 (Part 4)-1963. Durability. Soundness test- accelerated durability test. IS : 2386 (Part 5)-1963. Shape factors. ... ∴ For concreting the surface of the runways, roads and pavements, the aggregate impact value shall not exceed by weight 0.3 and 0.5 for WBM. Download Solution PDF. Share on Whatsapp …
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Learn how to measure the resistance of aggregates to sudden impact or shock using a testing machine, a hammer, and a sieve. Find …
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This document describes a test to determine the aggregate impact value (AIV) of aggregates used in road construction. The test involves sieving aggregates to obtain samples between 14-10mm in size, drying the samples, compacting them in layers in a steel cylinder, and subjecting the cylinder to 15 blows from a hammer. The 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)- 1963,IS Sieves of sizes – 12.5mm, 10mm and 2.36mm, …
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Learn how to perform aggregate impact value test to measure the compressive strength of aggregate under impact force. Find out the …
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Table 2 — Guide to minimum mass of test portions required to obtain a suitable mass of material to determine the aggregate crushing value Grading of the aggregate 5.7 A cylindrical metal measure, for measuring the test samples, of sufficient rigidity to retain its form under rough usage and having an internal diameter of 115 ± 1 mm and an ...
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Learn how to conduct an aggregate impact test to measure the resistance of aggregates to sudden impact. Find out the recommended values and classifications …
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Aggregate Impact Value Test Calculator Input: a) Weight of empty Cylindrical steel cup (W1) Gram b) Weight of Cylindrical steel cup + Aggregate (W2) Gram *After sieve filtering c) Weight of Aggregate …
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The aggregate impact value gives a relative measure of the resistance of the aggregate to sudden shock or impact. ... 7.6.6 Aggregate impact value 7.6.6.1 Procedure a) Test specimens in a dry condition (i) Fix the cup firmly in position on the base of the impact machine and place the
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Learn how to perform the aggregate impact value test to measure the resistance of aggregates to sudden impact load. Find out the objectives, test apparatus, sample preparation, procedure, calculation and result interpretation of the test.
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