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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, stabilized soil and recreational turf. Impact Value is one of the properties used to evaluate
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. Procedure o f Aggregate Impact Test The test sample consists of aggregates sized 10.0 mm 12.5 mm. Aggregates may be dried by heating at 100110 C for a period of 4 hours and cooled.
Aggregate Impact Value Test. AIV test is conducted to determine the Aggregate Impact Value of Coarse aggregate. 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.
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.
The methods are applicable to aggregates passing at 14.0 mm test sieve and retained on a 10.0 mm test sieve. For smaller size fractions, a recommended method is described in an appendix to this standard. Aggregate sizes larger than 14 mm are not appropriate to the aggregate impact value test.
Objective For determination of the aggregate impact value of coarse aggregate, which passes 12.5 mm. IS sieve and retained on 10 mm. IS sieve. Reference Standards IS 2386Part IV1963 Methods of test for aggregate for concrete Part IV Mechanical Properties. Equipment amp Apparatus Aggregate Impact Test Machine Sieves 12.5mm,10mm Cylindrical metal measure Tamping Rod Balance
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 which is attached to a metal base of impact testing machine.
7.6 Aggregate Impact Value 7.6.1 Scope. The aggregate impact value gives a relative measure of the resistance of the aggregate to sudden shock or impact. The particular purpose which an aggregate is meant to serve requires the aggregate to have a particular strength which is usually stated in the specification. This test provides a method for
The aggregate impact value indicates a relative measure of the resistance of the aggregate to a sudden shock or impact which in some aggregates differs from its resistance to a slow compressive load. From the calculations done we know that the aggregate can be acceptable as their Aggregate Impact value is less then 20 Aggregate Impact Value 10.
testing aggregates part 110 methods for determination of aggregate crushing value acv bs 8121111990 1990 testing aggregates part 111 methods for determination of ten per cent fines value tfv bs 549711987 1987 precision of test methods guide for the determination of repeatability and reproducibility for a standard test
For the BS 812112 method, a small portion of 1410mmsized 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 percentage of the original weight of the
Experiment Name Determine of Aggregate Impact Value Test BS 812 Purpose of the test The Impact value of an aggregate is the percentage loss of weight particles passing 2.36mm sieve by the application of load by means of 15 blows of standard hammer and drop, under specified test condition.
Los Angeles abrasion test on aggregates is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is carried out by AASHTO T 96 or ASTM C 131 Resistance to Degradation of SmallSize Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine.
To evaluate the toughness of a stone i.e. the resistance of the aggregates to fracture under repeated impacts is called Impact test is done to determine the aggregate impact value of coarse aggregate as per IS 2386 PartIV 1993. Aggregate Impact Value Test as per IS 2386 PartIV 1993
Is2386PartIll1963 2.2 Method I Aggregate Larger than 10 mm 2.2.1 4 b 4 4 4 f gt ggt Apparatus The apparatus shall consist of the following Balance A balance or scale of capacity not less than 3 kg, readable and accurate to O5 g and of such a type and shape as
The Los Angeles L.A. abrasion test Figure 1 is a common test method used to indicate aggregate toughness and abrasion characteristics. Aggregate abrasion characteristics are important because the constituent aggregate in HMA must resist crushing, degradation and disintegration in order to produce a high quality HMA.
C535 Test Method for Resistance to Degradation of LargeSize Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine. C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials. C702 Practice for Reducing Samples of Aggregate to Testing Size. D75 Practice for Sampling Aggregates
Test Method IS 2386 P1 1963. Impact Value This test helps in determining the value which indicates the ability of an aggregate to resist crushing. The lower the figure the stronger the aggregate, i.e. the greater its ability to resist crushing. Test Method IS 2386 P4 1963, ASTMC 1312006. Lightweight Pieces
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