Exp 4 Aggregate Impact Value - Civil Engineers PK

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 one-third with the ...

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Importance of Different Testing on Road Aggregates – Civil ...

This test is performed to find out the hardness i.e resistance to abrasion of the stone aggregate. It is very important to know the aggregate hardness value before it used in road construction. 2. Impact test. This test is carried out to find the toughness i.e resistance to hammering effect of the stone aggregate. 3. Soundness or Durability test.

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AIV Lab Report - AGGREGATE IMPACT VALUE INTRODUCTION ...

The method of test covers the procedure for determining the aggregate impact value of coarse aggregates. OBJECTIVE. To determine the aggregate impact value of a coarse aggregate. APPARATUS. 1. Aggregate impact testing machine 2. IS sieve 14mm, 10mm, 2.36mm 3. a cylindrical measure 4. rod and balance 5. Bristle brush 6. Weighing Scale APPARATUS

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Aggregate Impact Value Testing | AIV TEST - Civil ...

Aggregate Impact Value Test. AIV test is conducted to determine the Aggregate Impact Value of Coarse aggregate. 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.

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Impact Test Of Aggregate | Lab Test Procedure ...

The road aggregates are subjected to subsequent impact due to the movement of vehicles. Hence, the road aggregates should possess sufficient toughness to withstand such an impact. The impact value test is hence used to determine the measure of the toughness of aggregates. 2. General Test Procedure of Impact Test of Aggregate

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IS 2386-4 (1963): Methods of test for aggregates for ...

c) Determination of Aggregate Impact Vaiue, d) Determination of Aggregate Abrasion Value, e) Determination of the Polished Stone Value, and f) Determination of Crushing Strength. 2. DETERMINATION OF AGGREGATE CRUSHING VALUE 2.1 Object - This method of test covers the procedure for determining

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Road Aggregate 101: Important Stuff

10/11/2012 7 Road Aggregate 101: Nominal maximum and/or minimum sized stone in mix The nominal size distribution of an aggregate specification is defined as the range of sieve openings through which of the aggregate can pass. Road Aggregate 101: Gradation or distribution of …

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aggregate impact value ful report

Crush samples having an impact value of 12.5% fall in the category of 10-20%, therefore, the aggregate test sample is classified as strong and can be seen in the table below. The aggregate impact value is useful for selecting the good aggregates for road construction. Aggregate appropriate for cement wearing course should have maximum AIV of 30%.

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Aggregate Impact Test » Engineering Basic

• Aggregate Impact Values, AIV's, below 10 are regarded as strong, and AIV's above 35 would normally be regarded as too weak for use in road surfaces. • Aggregate Impact Values and Aggregate Crushing Values are often numerically very similar, and indicate similar aggregate strength properties. Recommended Aggregate Impact Test Values

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Impact Test on Aggregates - GharPedia

Aggregate impact value (The value of aggregate impact test) = (W1/W2)*100. The value of aggregate impact test should not be more than 45% by weight of aggregates, used for concrete other than wearing surface. An impact value 35% is permissible for the bituminous macadam. Maximum permissible impact value for the water bound macadam is 40%.

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Aggregate Impact Value Test - Procedure & Uses - [Civil ...

Likewise, the coarse aggregate used in road structure plays a vital part in its strength. ... The impact value is measured in the ratio between the sieved aggregate of 10mm & 2.36mm aggregates. The aggregate impact value test will be conducted as per the Indian Standard Code IS code 2386 Part 4.

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Aggregates MCQ [Free PDF] - Objective Question Answer for ...

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 …

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Aggregate Impact Value Test - Civil Engineering Soft Studies

AIM: To find the aggregate Impact value. Theory: Aggregate to be used as road materials must possess some properties or characteristics. Toughness is one of the highly required property which is necessary for the aggregates to bear the impact loads. Road aggregates are applied with the impact loads a millions of times in their life … Aggregate Impact Value Test Read More »

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Aggregate Impact Value test – we civil engineers

Aggregate having AIV % equal or greater than 35 % is considered bad to use in road construction. PURPOSE OF TEST: Aggregate Impact Value test determines 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 and - SlideShare

Impact test may either be carried out on cylindrical stone specimens as in Page Impact test or on stone 1 aggregates as in Aggregate Impact test. The Page Impact test is not carried out now-a-days and has also J.' been omitted from the revised British Standards for testing mineral aggregates.

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Pavement materials: Aggregates

Impact test 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 …

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Aggregate Impact Value Test | Impact Test Of Aggregate ...

This impact load can break aggregate into smaller pieces and which results in the failure of roads and pavements. Impact Test of Aggregate. It is the ability of aggregates that resist sudden impact or shock load on it. Also, it can be defined as the resistance of aggregate to failure by impact load is known as the Impact Test of Aggregate.

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Test on Aggregates, lab tests, fine aggregate test, coarse ...

Aggregate 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 is assessed by aggregate crushing test.

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PROPERTIES AND TESTING OF AGGREGATES FOR PAVEMENT WORKS ...

Impact Test on Aggregates Impact value of aggregate will give aggregate capability against sudden loads or forces. For this test also aggregate passing through 12.5mm and retained on 10mm sieve is taken and oven dried. Fill the cylinder with aggregate in 3 layers, 25 strokes of tamping for each layer. Weight w1 noted.

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(DOC) AGGREGATE IMPACT VALUE TEST | hong g.woei - …

1.0 AGGREGATE IMPACT VALUE TEST 1 1.0 INTRODUCTION 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 is assessed by aggregates impact test.

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250+ TOP MCQs on Highway Materials – Stone Aggregate Tests ...

Clarification: The aggregate impact value is obtained as the ratio of the weight of sample passing 2.36 mm sieve to the weight of the sample taken for the test. For the readings in the question, the aggregate impact value can be found out as =(frac{92}{350}=26.29approx26) % and is expressed as a whole number in percentage. 11.

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Aggregate Impact value Test Apparatus, Procedure and uses ...

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 …

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Aggregate Impact Value - Civil Engineering Portal ...

AGGREGATE IMPACT VALUE This test is done to determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) – 1963. 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, A […]

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toughness of the aggregate

Jul 01, 2019· The aggregates should therefore have sufficient toughness to resist their disintegration on due to impact. This characteristics is measured by impact value test. 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.

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Aggregate Impact Test – Construction How

The load subjection of vehicles on the road surface results into the fissuring of the aggregate particles resulting into the loss of strength. Therefore, the aggregates adopted should be tough enough to withstand the application of loads and this factor is determined through this test.

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Road Aggregates for Construction | Requirements ...

Aggregates in the pavement are also subjected to impact due to moving wheel loads. The magnitude of impact increase with roughness of road and speed of vehicle. Severe impact is common when heavily loaded steel tyred vehicles move on WBM. The resistance to impact or toughness is thus another desirable property of aggregates. 4. Durability

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Impact test - Determination of aggregate Impact value ...

Impact test on aggregate is determines the ability of an aggregate to withstand sudden loads. Aggregates are the significant factor that contributes adequate strength to concrete. Therefore it is important to obtain the right quality aggregate for construction. Aggregates are often subjected to impact due to the movement of vehicles on road.

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Aggregate Crushing Value Test – Determine Aggregate ...

Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under standardized conditions, and the strength of the aggregate used in road construction is expressed by numerical index. Aggregates with lower crushing value show a lower ...

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Aggregate Impact Test | Aggregate Impact Value | Impact ...

Detailed Impact Test on Road Aggregates with calculation of Impact value has been shown, also range of aggregate impact value is explained.Toughness is the p...

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[Solved] The aggregate impact value of the aggregate used ...

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.. Aggregate impact value is then the percentage of fine passing through 2 ...

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