Aggregate crushing value test procedure and result. Aggregate impact value this test is done to determine the aggregate impact value of coarse aggregates as per. Apparatus the apparatus consists of an impact testing machine, a cylindrical measure, tamping rod, is sieve, balance, tamping rod and oven. Uta0650 aggregate impact value aiv testing apparatus. 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. After being subjected to the rotating drum, the weight of aggregate that is retained on a no. Aggregates may be dried by heating at 100110 c for a period of 4 hours and cooled. An impact value is measured as % of aggregates passed through the 2. Determination of aggregate impact value impact test on aggregates. This test is done to determine the aggregate impact value of coarse aggregates as per is. Procedure the test sample consists of aggregates passing 12. 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. 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.
Just click on the names of the tests above to know the entire procedure of how we perform these tests. Report the mean as the aggregate impact value, unless the individual results differ by more than 0. Doc aggregate crushing value test lab report adnan abir. Advantages of aggregate impact value test products. The resistance of the material to failure by impact is known as toughness. Aggregate impact value test apparatus, procedure and uses. This resistance of aggregate may differ from resistance to gradual load which we measure in the crushing value test. Aggregate impact value testing aiv test civil engineering. Aiv test is conducted to determine the aggregate impact value of coarse aggregate. 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. Aggregate abrassion value aba x 100 where, a weight in gm of ovendried sample.
A sample proforma for the record of the test results is given in the. Aggregates can be dehydrated by warming them at temperatue of 100110 c for a. The aggregate impact value testing apparatus, meets with bs 812, it 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 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. The methods are applicable to aggregates passing at 14. Comparative study of established test methods for aggregate. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including, advantages of aggregate impact value test, quarry, aggregate, and different kinds of minerals.
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. For this reason assessment of strength of the aggregate is made by using a sample of bulk aggregate in a standardized manner. For smaller size fractions, a recommended method is described in an appendix to this standard. Aggregate impact value the value of aggregate impact test w1w2100. Aggregate impact value aiv test machine mechanical and. Determination of aggregate impact value impact test on. To find impact value of the given aggregate sample. The counter fitted to the machine automatically records the number of blows delivered to the sample. Report the mean as the aggregate crushing value, unless the individual results differ by more than 0.
May 07, 20 objective for determination of the aggregate impact value of coarse aggregate, which passes 12. Aggregate sizes larger than 14 mm are not appropriate to the aggregate impact value test. This characteristic is measured by impact value test. Aggregate impact value to bs812112 impact test equipment. Abrasion test is widely used as an indicator of the relative quality or competence of mineral aggregates. The apparatus used for determining aggregate impact value of coarse aggregates is. Standard test methods for determination of the impact value. Resistance to degradation of largesize 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. This testing method is known as an aggregate crushing value test. The device has a tripaction hammer release, blow counter device and a builtin operator safety device. Assess suitability of coarse aggregates for use in different types of road. 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 crushing value.
Determine the aggregate crushing value of coarse aggregate. Procedure of aggregate impact value test the test sample. In this video, we will see the procedure of determining aggregate impact value as per is 2386 part4. The difference between the original weight and the final weight of the test sample is expressed as a percentage of the original weight of the test sample. Aggregate impact value w1 w2 weight of fraction passing 2. Aggregate impact and crushing test linkedin slideshare. The crushed aggregate is removed from the test specimen and sieve it through the 2.
This important property of aggregate is determined by the impact value test. Dec 07, 2017 in this video, we will see the procedure of determining aggregate impact value as per is 2386 part4. Aggregate crushing value test determine aggregate crushing. 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 12, 2017 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 o f aggregate impact test the test sample consists of aggregates sized 10. Apparatus the apparatus of the aggregate impact value test as per is. Therefore, aggregate used for such propose should have sufficient toughness to resist their disintegration due to the impact. The aggregate impact value is expressed as the percentage of the fines formed in terms of the total weight of the sample. The aggregate impact value gives a relative measure of the resistance of an. Aggregate impact value used to determine the impact value of aggregates and select them for a given application.
Aggregate crushing value provides the resistance of an aggregate sample to crushing under gradually applied compressive load. Several attempts to develop a method of test for aggregates impact value have been made. The loss of aggregate 1663 g the percentage of wear 33. Dec 15, 2017 dcc31 determination of aggregate impact value. Determination of aggregate impact value impact test on aggregates is done to carry out to. Aggregate impact value test construction aggregate. The test specimen includes the aggregates of size ranging from 10. To determine the aggregate impact value of coarse aggregates as per. Impact value of an aggregate is the percentage loss of particles passing 2.
Determination of the aggregate impact value of different coarse aggregate samples. 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 most successful and known test is described below. Aggregate impact value is used to classify the stones in respect of their toughness property that is shown in table below. Methods of test for aggregates for concrete, part 4.
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