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.

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 IS sieve.

Jun 22, 2014· The aggregate impact value is expressed as the percentage of the fines formed the total weight of the sample Aggregate Impact Value (AIV) = (100*M2)/M1 Where: M1 =Mass of the test specimen M2 = Mass of the test specimen passing mm test sieve

Jul 17, 2017· The aim of aggregate impact test is to determine the relative measure of the resistance of aggregate to sudden shock or impact in which in some aggregate differs from its resistance to a slowly applies compressive load. The property of a material ...

Procedure of Aggregate Impact value test. The test sample: normally aggregates sized mm to mm. the aggregates should be dried by heating at 100110 0C for a period of 4 hours and cooled.

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. Aggregate Impact Value; Test Specifications:

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.

No: AT199 NAME: Aggregate Impact Value Test Apparatus Quality Standard: As Per IS 2386 (PIV) Aggregate Impact Value Test Apparatus is used for determining the aggregate impact value. The Sturdy Construction consists of a base and support columns to form a rigid framework around the quick release trigger mechanism to ensure an effective free fall of the hammer during test.

Impact value of aggregate is an important test in your engineering you design pavements, the impact load is one of the challenging factors that you need to determine the aggregate impact value the required apparatus are given below.

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%.

The Aggregate Impact Value Testing Apparatus is robustly designed to determine the Aggregate Impact Value (AIV) of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact. The number of blows delivered to the sample is automatically documented by the counter that is fitted to the machine.

their disintegration due to impact. This characteristic is measured by 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. 3. APPARATUS The apparatus of the aggregate impact value test as per IS: 2386 (Part IV) – 1963

Aggregate Impact Value Test as per IS 2386 (PartIV) 1993. Theory and Scope. 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. The aggregate should therefore have sufficient toughness to resist ...

Jan 25, 2018· AGGREGATE IMPACT VALUE TEST AIM: To find Impact value of the given aggregate sample. APPARATUS The apparatus consists of an impacttesting machine, a cylindrical measure, tamping rod, IS sieve, balance, tamping rod and oven. PROCEDURE The test sample consists of aggregates passing mm sieve and retained on 10 mm sieve and dried in an oven for four hours …

The crushing value of aggregate is very important to know the strength of the aggregate. For finding the resistance of aggregate under gradually applied compressive load, the crushing value test of aggregate is done. For the crushing value test, the following procedure is followed. Procedure for finding the crushing value of aggregate.

Apr 23, 2019· Aggregate Impact value test machine. Cylindrical steel cup which dia is 102 mm and depth is 50 mm. Cylindrical steel cup for measure the sample for the test which dia is 75 mm and depth is 50 mm. Metal hammer attached with impact value testing machine which …

The aggregate impact value indicates a relative measure of the resistance of an aggregate to a sudden shock or an impact, which differs from its resistance to a slow gradually increasing compressive load. Why to test Aggregate Impact Value? Toughness is the property of a material to resist impact. Due to traffic loads the road stone are ...

Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load. Coarse aggregate crushing value is the percentage by weight of the crushed material obtained when test aggregates are subjected to a ...

The ratio of the weight of fines formed to the total sample weight in each test shall he expressed as a percentage, the result being recorded to the first decimal place: Aggregate Impact Value = (B/A) X 100 where A = weight in g of saturated surface dry sample, B …

Jan 12, 2017· The aggregates must thus have adequate rigidity to resist their breakdown due to excessive impact. This property is calculated by impact value test. The aggregate impact value is a calculation of the resistance to abrupt impact, bang or shock, which may vary from its resistance to steadily, applied compressive weight. Procedure:

Dec 15, 2017· The aggregates 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 a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load.

Jan 23, 2018· 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. Resistance of the aggregates to impact is termed as toughness. Aggregates used in the pavement should be able to resist the effect caused by the jumping of the steel ...

nearest whole number. Report the mean as the aggregate impact value, unless the individual results differ by more than times the mean value. In this case repeat the test on two further specimens, calculate the median of the four results to the nearest whole number and report the median as the aggregate impact value.

Mar 31, 2017· Assuming That You Are Refering to Crushing And Impact Tests of Aggregates * Crushing Test Gives Us Idea About Strength of Aggregate. * * Strength : Resistance To Gradual Loading * Impact Test Gives Us Idea About Toughness Of Aggregate. * * Tough...

Apr 24, 2019· Specific gravity value of an aggregate represents how much dense the aggregate is compared with water. Why Specific Gravity Test of coarse aggregate Required? For concrete, asphalt or any mix design where aggregate is used. By specific gravity, we can guess its quality like Aggregate impact value, Abrasion, Bulk density, etc..

Impact value of an aggregate is the percentage loss of weight particles passing sieve by the application of load by means of 15 blows of standard hammer and drop, under specified test condition. The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact, which in some aggregates ...

A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the fulltext.

This Apparatus is used to determine aggregate impact value of coarse aggregate. The hammer of the tester fall freely from 380 mm height on coarse aggregate for 15 times/15 crushed aggregate removed from the cup ,then sieved and weighed. The % ratio of the weight passing sieve and weight of oven dried sample is Aggregate Impact value.

Apr 19, 2017· Creative Head : A. Mohan K. Venkat Raman Project Assistant : Kennedy S. Rajkumar Technical Support: P. Sadhan V. Vignesh Kumar

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 – , 10mm and , A cylindrical metal measure of 75mm dia. and 50mm depth, A tamping rod of 10mm circular cross section and 230mm length, rounded at one end and Oven.

Feb 08, 2012· Aggregate impact and 1. 10 Aggregate Crushing Value TestINTRODUCTION The principal mechanical properties re~ired in road stones are Q satisfactory resistance to crushingunder the roller during construction and (jjI adequate resistance to surface abrasion under traffic.

Mar 21, 2018· • 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

Usually in large construction works, whether the available aggregate is suitable or not for the work is determined by the impact value test of aggregate. The impact value test of aggregate gives a relative measure of the resistance of an aggregate to sudden shock or impact. Steps by step procedure for Impact value test of […]

## Leave a comment