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 and stabilized soil. Impact Value is one of the properties …
compressive load. With aggregate of aggregate impact value (AIV) higher than 30 the result may be anomalous. Also aggregate sizes larger than 14 mm are not appropriate to the aggregate impact test. The standard aggregate impact test shall be made on aggregate passing a 14. mm BS test sieve and retained on a 10.0 mm BS test sieve. If …
Learn how to perform aggregate impact value test to measure the compressive strength of aggregate under impact force. Find out the formula, apparatus, steps, report and recommended values for different …
test shall be expressed as percentage of the oven dried, the result being recorded to the first decimal place: C Aggregate impact value = A X ]00 where C 11IOII weight of the fines formed, and A = weight of the oven-driedsample. 6. REPORTING OF RESULTS 6.1 The mean of the two results shall be reported as aggregate impact value (wet)ofthe tested ...
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.. …
The aggregate impact value test is an important test of aggregates. It is done to obtain the resistance and impact of aggregates (stones). In this test a machine is used, which is called impact testing machine.
Explanation: After the impact test is conducted, the results are obtained in percentage. The aggregate is said to be exceptionally tough when the value is 10%, very tough when the value is in between 10 - 20%, good for pavement surface when the value is in between 20 – 30% and weak if the value is >35%.
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. Aim: – To determine Aggregate Impact Value Using Impact Testing Machine. Apparatus: – Impact Testing Machine: – Weight of hammer is 13.5 to 14.0 kg …
Observations and Calculations Calculate the aggregate impact value (AIV) expressed as a percentage to the first decimal place for each test specimen from the following equation: Where (𝐴𝐼𝑉) = 𝑀2 × 100 𝑀1 M 1 is the mass of the test specimen (in g); M 2 is the mass of the material passing the 2.36 mm test sieve (in g ...
Learn how to estimate the aggregate impact value of a sample using IS: 2386 (Part-4)-1963 standards. The experiment involves impact testing machine, sieves, balance, oven and tamping rod.
Impact Value is one of the properties used to evaluate the strength of a layer of soil up to about 150 mm (6 in.) in thickness and by inference to indicate the …
Learn how to conduct an aggregate impact test to measure the resistance of aggregates to sudden impact. Find out the recommended values and classifications …
Learn how to measure the resistance of aggregates to sudden impact or shock using a testing machine, a hammer, and a sieve. Find …
AIV Test Lab Report. Also, Read: Laboratory Test on soil – Procedures and Objective Aggregate Impact Value Limits As Per IS code: Aggregates are essential ingredients for making concrete, and the properties of concrete …
1.1 This test method covers the determination of the Impact Value (IV) of a soil either in the field or a test mold. 1.2 The standard test method, using a 4.5 kg (10 lbm) hammer, is suitable for, but not limited to, evaluating the strength of an unsaturated compacted fill, in particular pavement materials, soils, and soil-aggregates having …
1.2 Aggregate impact value test (AIV) The aggregates are exposed to impact d ue to the passage of . vehicles on the road, resulting in their breaking down into . smaller parts.
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. ... and allowed to fall freely on to the aggregate. The test sample shall be subjected to a total of 15 such blows each being delivered at an interval ...
Aggregate Impact Value Test (AIV) (alternative to ACV) 4. Specific Gravity test . 5. ... Aggregate Impact Value (AIV) Tes t . This test is done as an alternative to ACV. It .
IS : 2386 (Part IV) '- 1963 2.2 Apparatus - The apparatus for the standard test shall consist of following : a) A 15-cm diameter open-ended steel cylinder, with plunger and base-plate, of the general form and dimensions shown in Fig. 1.
Aggregate impact value is the measure of the resistance of an aggregate to sudden shock or impact. This test is conducted to determine the toughness of …
3.2.4 heavy medium heavy impact value (IV/HMH), n—the IV derived from using a 10 kg (22 lbm) mass hammer 130 mm (5 in.) in diameter free falling 300 mm (12 in). 3.2.5 impact soil tester, n—testing apparatus used to obtain an IV of a soil. 3.2.6 impact value (IV), n—the value expressed in units of
The aggregate impact value is expressed as the percentage of the fines formed w.r.t the total weight of the sample Aggregate Impact Value (AIV) = (100*M2)/M1 Where: M1 =Mass of the test specimen M2 = Mass of …
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 …
This document describes a test to determine the aggregate impact value (AIV) of aggregates used in road construction. The test involves sieving aggregates to obtain samples between 14-10mm in size, drying the samples, compacting them in layers in a steel cylinder, and subjecting the cylinder to 15 blows from a hammer. The aggregates …
In the Aggregate impact value test, a small portion of coarse aggregates having a size range between 10 to 12.5 mm, is confined in a 75 mm diameter cylindrical metal measure and subjected to 15 ...
The aggregate impact value gives a relative measure of the resistance of the aggregate to sudden shock or impact. ... 7.6.6 Aggregate impact value 7.6.6.1 Procedure a) Test specimens in a dry condition (i) Fix the cup firmly in position on the base of the impact machine and place the
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 AUTOMATIC CONCRETE COMPRESSION TESTING MACHINES FOR CONCRETE CUBE AND CYLINDER SAMPLES. SOIL …
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. Significance of Aggregate Impact Value. The Aggregate Impact Value is used to classify aggregates based on their suitability for ...
The equipment used for conducting the aggregate impact value test comprises of: The testing machine, which weighs between 45 and 60 kg, is equipped with a metal base featuring a flat lower surface measuring at least 30 cm in diameter. It is supported by a level and smooth concrete floor with a minimum thickness of 45 cm. …
Learn how to conduct the aggregate impact value test to measure the resistance of coarse aggregate used in road construction. See the apparatus, steps, formula, and lab report format with an illustrative example.