Aggregate impact value, (B/A) *100% ( 23.2/332.8) * 100% 6.97% And, hence, the finally aggregate impact value is 6.97 . Significance of impact test The procedure of determining aggregate impact value is according to IS 2386. More will the impact value more will be the strength of aggregate. The elongated and flaky aggregate has low strength as itDownload Free PDF. Aggregate Crushing Value Test. Busva Gopal. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 0 Full PDFs related to this paper. Read Paper. Aggregate Crushing Value Test. Download. Loading Preview
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 aggregate crushing value of coarse aggregate.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 specified load under standardized conditions.
The average crushing value in the different tests is the actual crushing value of aggregate. Important points to remember 1.It is recommended that the crushing value of aggregate should be less than 30%. If it is more than 30 % then 10% finer aggregate is suggested to use. 2.The aggregate whose crushing value is less than 30% canThe aggregate impact value test is carried out to know the response of aggregates to different kinds of loads that the aggregates will be subjected to during their service life. Impact Value. 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 ...
Aggregate crushing value test astm pdf Abrasion Test is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is suggested by AASHTO T 96 or ASTM C 131 Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in Los Angeles Machine.Procedure for aggregate impact value test Aggregate impact value test Machine Take a sample of aggregate and sieve with the help of a 12.5-millimeter sieve and retain it into a 10-millimeter sieve. Sieving should be done in a circular motion. After that sample should be sieved with 10 millimeters sieve and collect in a container.Express the stripping value as the ratio of the uncovered area observed visually to the total area of aggregates in each test. Report the mean of three results as stripping value of the tested aggregates to the nearest whole number. PRECAUTION Care shall be taken while mixing aggregates with bitumen.
Aggregate Impact Value (AIV) Calculate the mean of the two results to the nearest whole number. Report the mean as the aggregate impact value, unless the individual results differ by more than 0.15 times the mean value. In this case repeat the test on two further specimens,
1.The ratio of the weight of fines formed to the total sample weight in each test shall be expressed as a percentage, the result being recorded to the first decimal place Aggregate Crushing Value (B/A) X 100 where A weight of oven-dried sample B weight in g of fraction passing through 2.36 mm IS sieve. 6.Video Aggregate Crushing Value Testthe aggregate crushing value (ACV) which gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. The method is applicable to aggregates passing a 14.0 mm test sieve and retained on a 10.0 mm test sieve. For other size fractions, there is another recommended method.
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 2 () 100 1 Where 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
determining the cleanness value. (2) Recombine all of the portions of the 2 in. 1 in. test specimen. (3) Retain each of the four portions of the 1 in. in. test specimen in separate containers. b. 1 in. No. 4 aggregate. No further preparation is required. c. Pit-run aggregate.The aggregate crushing value (ACV) of an aggregate is the mass of material, expressed as a percentage of the test sample. which is crushed finer than a 2,36 mm sieve when a sample of aggregate passing the 13,2 mm and retained on the 9,50 mm sieve is subjected to crushing under a gradually applied compressive load of 400 kN. 2 APPARATUS
percentage of the original weight of the test sample. This value is reported as the percentage of wear. Aggregate Abrassion Value ((A-B)/A) X 100 where, A weight in gm of oven-dried sample. B weight in gm of fraction retained on 1.70 mm IS Sieves after washing and oven-dried upto constant weight. 6.Video Los Angeles Abrasion Test
fresh test made. Two tests shall be made. 5.Calculation 1.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 -
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