a) Determination of Aggregate Crushing 'alue, b) Determination of the 10 percent Fines Value, 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.

The aggregate should therefore have sufficient toughness to resist their disintegration due to impact. This characteristic is measured by Impact Value Test. The aggregate impact value is the measure of resistance to sudden impact of shock, which may differ from its resistance to gradually applied compressive load.

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.

In this video, we will see the procedure of determining aggregate impact value as per IS 2386 PART4.

The aggregate impact value is defined as a relative measure of the resistance of an aggregate to sudden shock or impact, which (in some aggregates) may differ from its resistance to a slow compressive load.

Recommended aggregate impact value Precaution for aggregate impact value test. The sample of aggregate should be sieved in circular motion or movement. The sample aggregate should not be overheated on the oven. The weight of samples and dust should be tamped with the help of a standard size tamping rod.

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.

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. . apparatus required. Fig. 1: Balance. Balance should be accurate upto 1 g.

Aggregate impact value test gives an indication of aggregate's toughness property (i.e. property of a material to resist impact) Aggregate impact values are used to classify the stone aggregates with respect to toughness property as given below. Aggregate impact value (%) Toughness Properties <10 Exceptionally tough / Strong 10 – 20 Very tough / Strong […]

The aggregate impact value is expressed as the percentage of the fines formed in terms of the total weight of the sample. 100 W2 Where, W1 = Original weight of the sample. Aggregate Impact Value = W1 W2 = Weight of fraction passing 2.36mm IS sieve. Results: The mean of the three results is reported as the AIV (Aggregate Impact Value) of the ...

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%.

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 […]

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 …

AGGREGATE IMPACT VALUE TEST DESIGNATION : B.S 812: Part 112:1990 (BRITISH STANDARD) SCOPE: This method covers the toughness of road stone materials by Impact test. INTRODUCTION: Toughness is the property of a material to resist impact. A test designed to evaluate the toughness of stones under repeated impacts is called Aggregate Impact Value Test. Due to traffic loads, the road …

Apparatus Required Impact Value testing machine Electrical oven Tamping rod Weigh balance IS Sieves -(12.5mm,10mm &2.36mm) The procedure of the test Aggregate sample shall consists of particles passing on 12.5mm Sieve and retained on 10mm sieve. The aggregate to be tested shall be dried in an oven for a period…

Experiment No. 4: Determination of the aggregate impact value of different coarse aggregate samples. (BS 812) Scope & significance: Aggregate Impact Value The aggregate impact value gives a relative measure of the toughness or the resistance of aggregate sudden shock or impact is not proportional to the resistance to a slowly applied compressive load.

Aggregate Impact Value. 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. Heavy-duty construction with hardened steel surfaces for minimum wear. The complete assembly is cadmium plated for corrosion ...

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 ...

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%.

Objective For determination of the aggregate impact value of coarse aggregate, which passes 12.5 mm. IS sieve and retained on 10 mm. IS sieve. Reference Standards IS: 2386(Part IV)-1963 Methods of test for aggregate for concrete Part IV Mechanical Properties. Equipment & Apparatus Aggregate Impact Test Machine Sieves (12.5mm,10mm) Cylindrical metal measure Tamping Rod …

Aggregate impact value is the ratio of the weight of the fraction passing through 2.36 mm (weight W2) by the total weight of the sample (weight W1 + W2). Aggregate Impact Value = (W2/ (W1+W2)) * 100 = 80 gm / 300 gm = 26.67 (Impact Value…

Aggregate Impact Value The property of a material to resist impact is known as toughness. Due to movement of vehicles on the road the aggregates are subjected to impact resulting in their breaking down into smaller pieces. 3. Engr.Sayed Shajedul Hasan. Apparatus for Aggregate Impact Test Aggregate Impact Value Apparatus Balance (i) A testing ...

5.1 Impact Value, as determined using the standard 4.5 kg (10 lbm) hammer, has direct application to design and construction of pavements and a general application to earthworks compaction control and evaluation of strength characteristics of a wide range of materials, such as soils, soil aggregates, stabilized soil and recreational turf. Impact Value is one of the properties used to evaluate ...

The aggregate impact value is the proportion of the sample that passes a 2.36 mm sieve after the hammer impacts. European Standards will not contain the 10 per cent fines test or the aggregate impact value test (although a different impact test, the German Schlagversuch test, has been included).

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 the tested material.

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 »

The ' Aggregate Impact Value' is the mean of two observations, rounded to a nearest whole number. Precautions. Place the plunger centrally so that it falls directly on the aggregate …

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The aggregate impact value gives the relative measure of aggregate resistance to sudden shocks or loads. So in this article, we explain the procedures of the aggregate impact test for determining the impact value. Contents hide. 1 Tests on aggregates. 1.1 Must read : Los angeles abrasion test on aggregates.

The aggregate impact value indicates a relative measure of the resistance of an aggregate to a sudden i i shock or an impact, which in some aggregates differs from its resistance to a slow compressive load. The ~ I method of test covers the procedure for determining the aggregate impaet value of coarse aggregates.

Nilai agregat impact value (AIV) adalah persentase perbandingan antara agregat yang hancur dengan jumlah sampel yang ada. Agregat yang hancur dinyatakan dengan jumlah agregat yang lolos saringan 2,36 mm. menurut british standart agregat yang mempunyai nilai AIV 30 % dikatakan tidak normal dan nilai AIV yang besar dari ini menunjukkan jumlah agregat yang hancur cukup banyak, …