Pdf aggregate impact test find, read and cite all the research you need on researchgate. In order to decide the suitability of the aggregate for using in. The aggregate impact test is carried out to evaluate the resistance to impact of aggregates. An impact value is measured as % of aggregates passed through the 2. A080kit aggregate impact value apparatus bs 812 matest. Aggregate impact value test civil engineering panel.
This standard is issued under the fixed designation c 1. 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 impact and crushing test linkedin slideshare. Coarse aggregate means the aggregate which is retained on 4. This apparatus is used to determine aggregate impact value of coarse aggregate. Aggregate impact value the value of aggregate impact test w1w2100. Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load. Aggregates may be dried by heating at 100110 c for a period of 4 hours and cooled. 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. Aiv test is conducted to determine the aggregate impact value of coarse aggregate. All batches shall have the same quantity of fine aggregate. In this video, we will see the procedure of determining aggregate impact value as per is 2386 part4.
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. Aggregate impact value used to determine the impact value of aggregates and select them for a given application. 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 test sample shall consist of aggregate the whole of which passes a 12. To determine the aggregate impact value of coarse aggregates as per is. Aggregate impact value test as per is 2386 partiv 1993. Background when a road aggregate has been manufactured to a specified grading it is stockpiled, loaded into trucks, transported, tipped, spread and compacted. Key words matrix, mastic, dynamic mechanical analyzer, aggregate 18. The crushed aggregate is removed from the test specimen and sieve it through the 2. Standard test method for determining potential resistance. If the aggregate is weak, some degradation may take place and result in a change in.
C125 terminology relating to concrete and concrete aggregates. A small portion of 1410 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. A08004 test frame assembly a08002 cylindrical mould, dia. This test is done to determine the aggregate impact value of coarse aggregates. In order to analyse the behaviour of concrete under high strain rates, an impact mass is dropped from the maximum height of 9 m onto square concrete.
The sample used for this test shall be taken in accordance with chapter 2. Determination of aggregate impact value impact test on. One of the model in which pavement material can fail is by crushing under. Development of specificationtype tests to assess the. Aggregate impact test, ten percent fines test and aggregate crushing test. Procedure of aggregate impact test the test sample consists of aggregates sized 10. Tests on aggregate 7 elongation index of aggregate 8 flakiness index of aggregate 9 impact test 10 abrasion test 11 water absorption test. Pdf aggregate impact test find, read and cite all the research you need on researchgate we use cookies to make interactions with our website easy and meaningful, to better understand the use. How to determine aggregate impact value aggregate impact test. Ian sims, bev brown, in leas chemistry of cement and concrete fourth edition, 1998. Aggregate impact tester,impact testing machines,impact.
Impact value is one of the properties used to evaluate. 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. Comparative study of established test methods for aggregate. Compression test results show that highstrength concrete containing basalt.
This degree is assessed by a sieving test on the impacted specimen and is taken as the aggregate impact value. The apparatus construct by strong rigid steel frame and mechanical blow counter. This method of test covers the procedure for determining the aggregate impact value of coarse aggregate. Uta0650 aggregate impact value aiv testing apparatus. Pdf impact testing of concrete the measurement device.
Note 1 the aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Aggregate impact value aiv test machine mechanical and. The loss of aggregate 1663 g the percentage of wear 33. This test is done to determine the aggregate impact value of coarse aggregate as per is 2386 partiv 1993. 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. Aggregates impact impact test equipment ltd home page. Aggregate impact value to bs812112 aggregates impact. Aggregate impact value test as per is code 2386 part4, hardness test of aggregate duration.
Standard test methods for determination of the impact. Manual of aggregate quality test procedures april 16, 2019 illinois test procedure 71. This document is available to the public through ntis. Pdf standard test method for resistance to degradation.
The resistance of the material to failure by impact is known as toughness. Aggregate impact value ba x 100 where a weight in g of saturated surface. The 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. Methods of test for aggregates for concrete, part 4. The counter fitted to the machine automatically records the number of blows delivered to the sample. Aggregate impact value test apparatus, procedure and uses. Determination of aggregate impact value impact test on aggregates. Compressive strengths range from 25 mpa 3,670 psi to 97 mpa,970 psi. Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards. The hammer of the tester fall freely from 380 mm height on coarse aggregate for 15 times15 sec. Higher the aggregate size higher the fineness modulus hence fineness modulus of coarse aggregate is higher than fine aggregate. Procedure o f aggregate impact test the test sample consists of aggregates sized 10.
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