This characteristic is measured by the 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. …
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A test designed to evaluate the toughness of stones or the resistance of the aggregates to fracture under repeated impacts is called impact test. The aggregate impact value gives a relative measure of the resistance of …
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The document describes the process to determine the aggregate impact value in the laboratory. Samples of aggregate sized 12.5-9.5mm were weighed and placed in a cylindrical cup. A hammer was dropped from a height of 38cm onto the aggregates 15 times. The aggregates were then sieved and weighed to determine the percentage loss, giving the aggregate impact value. The …
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This document describes a test method for determining the aggregate impact value (AIV) of aggregates, which provides a measure of their resistance to sudden shock or impact. The test involves compacting aggregate samples in a steel cup and subjecting them to 15 blows from a hammer. The crushed material is then sieved and the percentage passing a 2.36mm sieve is …
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The Aggregate Impact Value (AIV) test is a procedure conducted to determine the resistance of an aggregate to sudden impact or shock. This test is crucial in determining the quality and durability of aggregates for use in construction. In this article, we will discuss the complete procedure of conducting an AIV test, from the introduction to ...
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AGGREGATE IMPACT VALUE AIM :- To determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) - 1963. APPARATUS :- 1) Impact testing machine conforming to IS: 2386 (Part IV)- …
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The impact value of aggregate measures how well a material can resist sudden, strong resistance, as aggregates with higher impact values are taken into consideration as much less durable and more liable to cracking beneath …
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The impact value is calculated as the percentage of material passing the 2.36mm sieve relative to the total sample weight. A value between 10-20% is considered very strong and suitable for use in concrete and road construction. The results of testing three samples are reported, with an average impact value of 13.42% indicating very strong ...
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To measure this characteristic, the impact value test is conducted in an aggregate testing laboratory. The test determines the aggregate's resistance to sudden impact or shock, which may differ from its resistance to gradually …
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The aggregate impact value test determines a sample's resistance to impact by subjecting it to 15 blows and measuring the percentage of fines produced. For the sample tested, the students found an average aggregate impact value of 11.764%, indicating the aggregate is medium tough and meets the JKR's requirement of below 30%.
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Procedure of Impact Test. The procedure of the impact value test includes the following series of steps: 1. The aggregate samples of size 10mm to 12.5mm (passing through 12.5mm sieve and retained on 10mm sieve) are first taken and oven-dried at a temperature ranging from 100 degrees Celsius to 110 degrees Celsius for about four hours.
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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. ... COMPRESSION MACHINES …
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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 …
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Apparatus 1. Aggregate Impact Machine 2. Steel cylinder mould 3. Tamping rod 4. Sieves of sizes of 12.5 mm, 10.0 mm and 2.36 mm 5. Laboratory oven 6. Metal trays 7. Electronic balance of accuracy to 0.01 g 8. Fine haired brush (3 mm) Procedures 1. The aggregates sample was prepared by sieving the aggregate first and the portion passing 14.0 mm test sieve …
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This property is measured by aggregate impact value test. So that aggregate impact value test is used to determine the relative measure of the resistance of aggregate to sudden shock or impact, which in some aggregate …
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The purpose of conducting an Impact Test on Aggregates is twofold. Firstly, it is performed to determine the impact value of road aggregates. This value is a measure of the strength or toughness of the aggregates and is calculated by subjecting them to a standard amount of impact. The impact value is then used to… /determination-of-aggregate-impact …
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2. This test is done to determine the aggregate impact value of coarse aggregates AIV is basically a % ratio of 2.36mm sieved aggregate to 14mm aggregate sieve. The apparatus used for determining aggregate impact value of coarse aggregates is Impact testing machine Sieves of sizes – 14mm, 10mm and 2.36mm,a cylindrical metal measure of 75mm diameter …
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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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The aggregate impact value indicates a relative measure of the resistance of an aggregate to a sudden shock or an impact, which in some aggregate differs from its resistance to a slow compressive load.
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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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SIGNIFICANCE: The model developed for the relationship between aggregate crushing value (ACV) and ten percent fines aggregate crushing test (TFV) is useful in economics and safety perspective in ...
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The document discusses the aggregate impact value test, which measures a material's resistance to sudden impact. The test involves compacting aggregate samples and dropping a hammer onto them. The crushed pieces are then sieved and weighed to calculate the impact value. Lower values indicate stronger aggregates suitable for use in road construction like surfacing, while …
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Aggregate impact values are used to classify the stone aggregates with respect to toughness property as given below. The test equipment and the test procedure are quite simple and it determines the resistance to impact of …
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To determine the aggregate impact value of a coarse aggregate. APPARATUS. 1. Aggregate impact testing machine 2. IS sieve 14mm, 10mm, 2 3. a cylindrical measure 4. rod and balance 5. Bristle brush 6. Weighing Scale APPARATUS. Aggregate Impact Value Instrument. CALCULATION. Description Sample I (G) Sample II (G) Sample Mould weight (W1) 2548 2548.
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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 the calculated Aggregate Impact Value in percent.
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Objective: 1. Determine the aggregate crushing value of coarse aggregate. 2. Assess suitability of coarse aggregates for use in different types of road. Theory: The " aggregate crushing value " give a relative measure of the resistance of
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Aggregate Impact Value = W B W A × 100. Where, W A is Weight of oven-dried sample; W B is Weight of fraction passing through 2.36-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 …
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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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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 …
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