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...

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 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 15, 2019· Aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact, As an alternative to crushing value, the aggregate impact value should not exceed 45% by weight for aggregates used for concrete other than for wearing surfaces and 30% by weight for concrete for wearing surfaces, such as runways, roads ...

aggregate impact value test With Respect to concrete aggregates,toughness is usually considered the resistance of the material to failure by impact.Several attempts to develop a method of test for aggregates impact value have been made.The most successful …

To evaluate the toughness of a stone i.e. the resistance of the aggregates to fracture under repeated impacts is called Impact Test.This test is done to determine the aggregate impact value of coarse aggregate as per IS 2386 (Part-IV) 1993. Aggregate Impact Value Test as per IS 2386 (Part-IV) 1993

Explanation: The aggregate crushing value provides a relative measure of a maximum value of 40%age is allowed for WBM base course in Indian conditions. 7. Aggregates to be used for wearing course, the impact value shouldn't exceed ________ percent.

Aggregate Impact Value With respect to concrete aggregates, toughness is ... Several attempts to develop a method of test for aggregates impact value have been ..... A limitation to the quantity of such impurities is already shown in T able 3.5. More details » Get Price

Place the mould in the aggregate impact testing machine and administer 15 numbers of blows of a metal hammer. After that, remove the crushed aggregate and sieve it through a 2.36 mm sieve. The aggregate impact value is measured as % of aggregates passing through the 2.36mm sieve (W2) to the total weight of the sample (W1).

Typical shrinkage values for concrete specimens with a 5 to 1 aggregate-cement ratio are 0.04, 0.06, 0.075 and 0.085 per cent for water-cement ratios of 0.4, 0.5, 0.6 and 0.7, respectively. One of the reasons is that the density and composition of calcium silicate formed at different water-cement ratios may be slightly different.

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 crushing value – particle size 10 mm and greater: BS 812-110:1990 UKAS Accredited

This is known as aggregate impact value test IS 283-1970. Result: Aggregate impact value shall not exceed 45 % by weight for aggregate used for concrete other than wearing surface and 30 % by weight for concrete for wearing surfaces such as runway, roads, and pavements.

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.

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 …

Jul 16, 2014· 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 […]

For bituminous concrete, a maximum value of 35 is specified. Figure 2: Los Angeles abrasion test setup; 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 ...

Mar 22, 2018· 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 ...

Ian Sims, Bev Brown, in Lea's Chemistry of Cement and Concrete (Fourth Edition), 1998. Aggregate impact value. A small portion of 14–10 mm sized coarse aggregate particles is confined in a steel pot and subjected to 15 blows by a small hammer in a standardised test rig, after which the ' aggregate impact value' (AIV) is determined from the fine material generated, expressed as a ...

Dec 08, 2017· In this video, we will see the procedure of determining aggregate impact value as per IS 2386 PART4.

Jul 01, 2019· 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 …

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