Aggregate crushing value test is done the find the actual crushing value of aggregate. We Need to carry out this test, 1.To find out how much resistance does the aggregate has against the surface abrasion under traffic. 2.To find out how much resistance does the aggregate can withstand under the roller during construction. 3.To determine the strength of coarse aggregate and suitability of the aggregate for construction. How to perform Aggregate crushing value test
NOTE 1 -The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. With aggre- gate of aggregate crushing value 30 or higher, the result may be anomalous, and in such cases the ten percent fines value should be determined instead.
If it is more than 30 then 10 finer aggregate is suggested to use. The aggregate whose crushing value is less than 30 can be used for cement concrete road. The aggregate whose crushing value is less than 40 can be used for wearing surface. This test must be done before it comes to road and pavement construction.
AGGREGATE CRUSHING VALUE. This test helps to determine the aggregate crushing value of coarse aggregates as per IS 2386 Part IV 1963. The apparatus used is Cylindrical measure and plunger, Compression testing machine, IS Sieves of sizes 12.5mm, 10mm and 2.36mm. Procedure to determine Aggregate Crushing Value.
The results obtained show that ACV value for aggregates are 25.04, 22.70, 36.13,and 37.89 for crushed granite, slag , hoggin all-in aggregate, and river gravel respectively. This show that ...
Aggregate Crushing Value W B W A 100 W B W A 100. Where, W A is weight of surface-dry sample. W B is weight of fraction passing the appropriate sieve. Reporting of Results. The mean of the two results shall be reported to the nearest whole number as the aggregate crushing value of the size of material tested.
aggregate crushing value did separate suitable and unsuitable aggregate for bitumen macadam roadbase. Fookes, Gourley and Ohikere 5 recommended that combinations of physical tests such as impact, crushing and abrasion resistance be used to assess aggregate durability. The Micro-Deval abrasion test was developed in France during the 1960s.
with the rock strength. By comparing technical properties Los Angeles LA value , aggregate crushing value ACV, aggregate impact value AIV and 10 percent nes ag-gregate crushing test 10 FACT with quantitative analysis mineral grain size and mineral grain size distribution, it is possible to determine the mineral grain size corre-
2.16 The aggregate crushing value is the ratio of the mass of fines formed by the crushing process to the total mass of the sample expressed as a percentage. Percentage fines BA x
Sep 12, 2015 Then crushed aggregates are then sieved through 2.36 mm sieve and weight of passing material W2 is expressed as percentage of the weight of the total sample W1 which is the aggregate crushing value. Aggregate crushing value W1W2100. A value less than 10 signifies an exceptionally strong aggregate while above 35 would normally be regarded as weak aggregates. Also Read Crushing Test Procedure of Aggregate. Also read Crushing Value Test Procedure of Aggregates. 2. Abrasion Test
Aggregate with a LA value of less than 30 LA 30 is considered strong enough for use in coating and road surface treatments i.e., surface dressing. Railway Ballast The test is modified to test railway ballast, in that 5kg of 3240, together
Jan 23, 2018 Aggregate crushing value BA x 100. The result should be recorded to the first decimal place and the mean of the two results reported. APPLICATIONLIMITS OF AGGREGATE CRUSHING VALUE The aggregate crushing value for cement concrete pavement shall not exceed 30. The aggregate crushing value for wearing surfaces shall not exceed 45. PURPOSE OF TEST
the aggregate crushing value. Aggregate crushing value W1 W2 100 A value less than 10 signi es an exceptionally strong aggregate while above 35 would normally be regarded as weak aggregates. Piston Load Sample Figure 221 Crushing test setup 22.3.2 Abrasion test Abrasion test is carried out to test the hardness property of aggregates and to decide whether they are suitable
2.2.1 Aggregate Crushing Value ACV Test The sample was placed in a cylindrical mould to a depth of 100 mm in 3 layers, with each layer been tamped 25 times with tamping road. The top was
Dec 19, 2014 CALCULATION Aggregate crushing value BA x 100 The result should be recorded to the first decimal place and the mean of the two results reported. To achieve a high quality of pavement, aggregate possessing low crushing value should be preferred.
Test Method IS 2386 P-1 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 P
Mar 16, 2018 To carry out the aggregate abrasion value test, the following are the procedures used 1. The cover of the machine is remove and the sample x amp y is pour above into the machine. 2. The abrasion charges is place on the sample and the cover is fix back firmly. 3. The machine is switch on and it is allow to undergo 500 revolutions at 28 30rpm.
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.
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 ...
Aggregate Crushing Value Wet-dry Strength Variation Los Angeles Abrasion Loss Sodium Sulphate Soundness Polished Aggregate Friction Value Adhesion with bitumen Plate stripping test for sealing aggregate Modified-Lottman Test for asphalt loss of Marshall Stability or
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, a recommended method is described in an appendix to this standard. The method is not suitable for testing aggregates with an aggregate crushing value higher than 30, and in such cases the method for ten per cent ...
Oct 14, 2020 TEST REPORT DETERMINATION OF AGGREGATES CRUSHING VALUE BS 812 PART 110 1990 NAL 013 MO-467169-4 Source date Emirates Steel AL LABORATORIES Independent Testing Laboratories d Materials Consultants This report r ories. ajithkumar ead COFER GLOBAL Re ort ABU DHABI, U.A.E. P.O. BOX 31039 TEL. 02 5542234 FAX 02 5547015 UAE
iii. Aggregate crushing value ACV The basic principle of this test is to determine resistance of an aggregate to crushing under a gradually applied compressive load. The aim is to show the crushing ability and its resistance to crushing against traffic wheel load. The ACV directly affecting the stability of
Two tests are required and the ten percent fines values TFV are averaged to obtain the final result, reported to the nearest 10 kN for forces 100kNPROCEDURE - Aggregate Crushing Value SS 19741. The apparatus and sample preparation is identical with that described above for the Ten Percent Fines Test