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Dec 30, 2018 · This degree is assessed by a sieving test on the crushed specimen and is taken as a measure of aggregate crushing value (ACV). Related Theory: Crushing Strength of Aggregate: The aggregate crushing value provides a relative measure of resistance to crushing under a gradually applied compressive load. To achieve a high quality of pavement aggregate possessing low aggregate crushing value …
Calculation of Aggregate Crushing Value. The ratio of weight of fines formed to the weight of total sample in each test shall be expressed as a percentage, the result being recorded to the first decimal place. Aggregate crushing value = (W2 x 100) / (W1-W) W2 =Weight of fraction passing through the appropriate sieve. W1-W =Weight of surface dry sample
Learn MoreTheory: The “aggregate crushing value” give a relative measure of the resistance of an aggregate to crushing under gradually applied compressive load. It’s the percentage by weight of the crushed(finer) material obtained when the test aggregates are subjected to a specified load under standardized conditions, and is a numerical index of the strength of the aggregate used in road construction
Learn MoreAug 09, 2017 · The specimen is subjected to a compressive load of 40 tones gradually applied at the rate of 4 tones per minute. Then crushed aggregates are then sieved through 2.36 m sieve and weight of passing material is expressed as percentages of the total sample which is aggregate crushing value
Learn MoreProcedure to determine Aggregate Crushing Value. i) The aggregates passing through 12.5mm and retained on 10mm IS Sieve are oven-dried at a temperature of 100 to 110 o C for 3 to 4hrs. ii) The cylinder of the apparatus is filled in 3 layers, each layer tamped with 25 strokes of a tamping rod
Learn MoreDec 16, 2020 · The aggregate crushing value of the coarse aggregates used for cement concrete pavement at surface should not exceed 30% and aggregates used for concrete other than for wearing surfaces, shall not exceed 45% as specified by Indian Standard (IS) and Indian Road Congress (IRC). See More Water Absorption Test (IS: 3495 (Part II)
Learn MoreAggregate Crushing Value (ACV) 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 slowly applied compressive load. With aggregate of aggregate impact …
Learn MoreAug 09, 2017 · The specimen is subjected to a compressive load of 40 tones gradually applied at the rate of 4 tones per minute. Then crushed aggregates are then sieved through 2.36 m sieve and weight of passing material is expressed as percentages of the total sample which is aggregate crushing value
Learn MoreTheory: The " aggregate crushing value " give a relative measure of the resistance of an aggregate to crushing under gradually applied compressive load. It's the percentage by weight of the crushed(finer) material obtained when the test aggregates are subjected to a specified load under standardized conditions, and is a numerical index of the strength of the aggregate used in road construction
Learn MoreThe aggregate crushing value (ACV) provides relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Two versions available: 150 (standard) and 75 mm dia. The apparatus comprehend cylinder, plunger, base plate, tamping rod and measure. Cylinder, plunger and base plate are made from special alloy steel, hardened to 650 HV (57,8 HRC), and protected …
Learn MoreProcedure to determine Aggregate Crushing Value. i) The aggregates passing through 12.5mm and retained on 10mm IS Sieve are oven-dried at a temperature of 100 to 110 o C for 3 to 4hrs. ii) The cylinder of the apparatus is filled in 3 layers, each layer tamped with 25 strokes of a tamping rod
Learn MoreDec 16, 2020 · The aggregate crushing value of the coarse aggregates used for cement concrete pavement at surface should not exceed 30% and aggregates used for concrete other than for wearing surfaces, shall not exceed 45% as specified by Indian Standard (IS) and Indian Road Congress (IRC). See More Water Absorption Test (IS: 3495 (Part II)
Learn MoreNov 25, 2016 · Theory: The ‗aggregate crushing value‘ gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. With aggregate 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. Procedure : 1
Learn MoreApr 13, 2020 · (ii) Aggregate crushing value (ACV) test on aggregate. ACV test (prescribed by BS 812: Part 110) provides useful information pertaining to the strength of aggregate; The aggregate to be tested should pass a 1 / 2 in. sieve and should be retained on 3 / 8 in. sieve; In this test, the aggregate sample is crushed using a compression testing machine through which a pressure of 3200 psi is applied for a …
Learn MoreLaboratory Testing Soil Testing Grain Size Analysis (sieve analysis and hydrometer test) Natural Moisture Content Bulk Density/Dry Density Atter berg Limits Specific Gravity Maximum and Minimum Density of SandDirect Shear Unconfined Compression Test Consolidation Test Permeability Test Standard and Modified Proctor Tests Soaked and Unsoaked CBR Organic Matter Sulphate Content Chloride Content
Learn Moreto determine the flakiness index of the given aggregates APPARATUS: The apparatus for the shape tests consists of the following: (i) A standard thickness gauge (ii) A standard length gauge (iii) IS sieves of sizes 63, 50 40, 31.5, 25, 20, 16, 12.5,10 and 6.3mm (iv) A balance of capacity 5kg, readable and accurate up to 1 gm. THEORY: The
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