The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Crushing value is a measure of the strength of the aggregate. The aggregates should therefore have minimum crushing value. 3. APPARATUS
[email protected]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 Test
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
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. 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
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
The CBR value is calculated from this formula, CBR% = [Load carried by soil sample at 2.5 or 5mm penetration / Load carried by standard crushed stone at 2.5 or 5mm penetration] x 100. Results: The expansion ratio of soil due to soaking and other details of the test may be reported as given in the observation sheet
RESULT Aggregate Crushing test value = 3 DEPT. OF CIVIL ENGG., DRONACHARYA GROUP OF INSTITUTIONS, GREATER.NOIDA TRANSPORTATION ENGINEERING LAB MANUAL 2013 Record of Observation Sample I Sample II Total weight of dry sample taken= W1 gm Weight of portion passing 2.36 mm sieve= W2 gm Aggregate crushing = (W2/W1)*100 Value (per cent) Aggregate
PRODUCT MANUAL FOR COARSE AND FINE AGGREGATE FOR CONCRETE ACCORDING TO IS 383 : 2016 ... 3 Aggregate crushing value/Ten Percent Fines Value (Clause 5.4.1) - Steel cylinder [As per clause 2.2.(a) and Fig 1 of ... TEST RECORDS –The manufacturer shall maintain test records for the tests carried out to
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 2.1 An
compressive load. With aggregate of aggregate impact value (AIV) higher than 30 the result may be anomalous. Also aggregate sizes larger than 14 mm are not appropriate to the aggregate impact test. The standard aggregate impact test shall be made on aggregate passing a 14. mm BS test sieve and retained on a 10.0 mm BS test sieve
Name of the experiment: Aggregate Crushing value test. Objective: 1. Determine the aggregate crushing value of coarse aggregate. 2. Assess suitability of coarse aggregates for use in different types of road. Theory: The “aggregate crushing value” give a relative measure of the resistance of an aggregate to crushing under gradually applied
Jul 18, 2021 A lower crushing value indicates a lower crushing fraction under a specific load and would give a better result, longer service life and economic performance. Aggregate crushing value test codes. Following are the standard guidelines for the crushing value test on the aggregates: • IS 2386 (Part 4):1963 • BS 812–110:1990. Objective. The
Feb 08, 2012 The aggregate impact value (AIV) is B AIV = 100 (%) . . . (1) ARESULTSAn average is taken of the two tests and the result is recorded to the nearestwhole number as the Aggregate Impact Value.The AIV is normally about 105 per cent of the Aggregate Crushing Value and itcan be used for the same purpose. For weak aggregates, the required load
Property Test Standard Criteria Hardness / Toughness Fines aggregate crushing test: 10% FACT SANS 3001-AG10 Asphalt surfacings and base: minimum 160 kN Open-graded surfacings and SMA: 210 kN Aggregate crushing value (ACV) SANS 3001-AG10 Fine graded: minimum 25% (Fine) Coarse graded: minimum 21% Soundness Magnesium sulphate soundness
Jul 01, 2019 Procedure of Aggregate Impact value test The test sample: normally aggregates sized 10.0 mm to 12.5 mm. the aggregates should be dried by heating at 100-110 0C for a period of 4 hours and cooled. Sieve the material through 12.5mm and 10.0 mm IS sieves
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
The crushing value of aggregates is rather insensitive to variation in strength of weaker aggregates. For this reason, a simple test known as 10 percent fine value is introduced. When the aggregates crushing value become 30% or higher, the results are likely to be inaccurate. Aggregate Crushing Load (Source: IS 2386 (Part 4):1963)
Aggregate crushing value test apparatus is used for measuring resistance of an aggregate to crushing. Made of Mild Steel comprising of: Cylindrical Cell, 150mm internal dia x 130 to 140mm height, Plunger, 148mm dia x 100 to 115mm height, Base Plate, 200 to 230mm square x 6mm thickness, Tamping Rod, 16mm dia x 450 to 600mm length
Sep 12, 2015 Crushing Test Fig-1 Crushing Test Setup. One of the model in which pavement material can fail is by crushing under compressive stress. A test is standardized by IS: 2386 part-IV and used to determine the crushing strength of aggregates. The aggregate crushing value provides a relative measure of resistance to crushing under gradually applied
Jul 27, 2018 Balance 2. Metal gauge 3. IS Sieves 4. Sample of aggregate (a quantity of aggregate shall be taken sufficient to provide a minimum no of 200 pieces od any fraction to be tested.) 8. Theory The elongation index on an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than 1.8 times their mean dimension
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