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 i) The aggregates passing through 12.5mm […]
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contrary, the aggregate crushing test is simple, rapid and gives fairly consistent results. Applications of Aggregate Crushing Test ItThe aggregate crushing value is an indirect measure of crushing strength of the aggregates.''" Low aggregate crushing value indicates strong aggregates, as the crushed fraction is low. ~hus the test can be
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These tests are a measure of the crushing properties of aggregate and use the same basic equipment. The ACV test requires a standard load of 400 kN to be applied over a period of 10 minutes while the TFV test measures the force required to produce a specified depth of plunger penetration. 150mm Aggregate Crushing Value Apparatus.
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6. Impact, 10% Fines & Crushing Tests If the percentage fines exceeds 30, the result may be anomalous as the broken pieces of aggregate will tend to fill the voids and prevent further crushing. In this case, the Ten Percent Fines Test is more appropriate. Some countries, e.g., Australia and New Zealand, only use the latter test.
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This video (Animation, Animated Video) explains How to determine aggregate crushing value (Aggregate Crushing Strength). Aggregate test || Coarse aggregate T...
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Aggregate crushing value. -3-111.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 ba x 100 where a weight of oven-dried sample b weight in g of fraction passing through 2.36 mm is sieve. 6.video
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The crushing strength or aggregate crushing value of a given road aggregate is found out as per IS-2386 Part- 4. 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 should be preferred.
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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. 2.Apparatus Required Fig. 1: Balance
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Precautions For Aggregate Crushing Value Test. 1The 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 BA X 100 where A weight of ovendried sample B weight in g of fraction passing through 236 mm IS sieve 6Video Aggregate Crushing Value Test
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Aggregate crushing value. -3-111.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 ba x 100 where a weight of oven-dried sample b weight in g of fraction passing through 2.36 mm is sieve. 6.video
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AGGREGATE ABRASION VALUE This test helps to determine the abrasion value of coarse aggregates as per IS: 2386 (Part IV) – 1963. The apparatus used in this test are Los Angles abrasion testing machine, IS Sieve of size – 1.7mm, Abrasive charge – 12 nos. cast iron or steel spheres approximately 48mm dia. and each weighing between 390 and 445g ensuring that the total weight of charge is
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Precautions For Aggregate Crushing Value Test. 1The 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 BA X 100 where A weight of ovendried sample B weight in g of fraction passing through 236 mm IS sieve 6Video Aggregate Crushing Value Test
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AIM: To determine the aggregate crushing value of coarse aggregates as per IS: 2386 (Part IV)
The aggregates crushing value test should be performed as per IS code 2386 Part IV. First, fill the sample aggregate with one-third of the cylindrical measure in three layers. Each layer should be tamped 25times freely. After filling the sample aggregate, weigh and record it as W1. Now fill the aggregate in the mould along with the plunger on top.
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Dec 15 2017 · 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 10 PRECAUTIONS 1 To wear safety shoes goggles at the time of testing 2 Before testing machine should be properly checked 3 After test clean the sieve by a smooth brush 4. Get Price.
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2500−1990 ACV = × 100 2500 = 20.4 % Result: Aggregate crushing value = 20.4% Result Analysis: 1. The value is higher when more percentage of aggregates crush and break into smaller pieces which indicates the aggregates are of a lower quality. 2.
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The aggregate crushing value is an indirect measure of crushing strength of the aggregates. Low aggregate crushing value indicates strong aggregates, as the crushed fraction is low. Thus the test can be used to assess the suitability of aggregates with reference to the crushing strength for various types of pavement components.
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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
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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 100-110° C for a period of 4 hours and cooled.
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The aggregate crushing value is an indirect measure of crushing strength of the aggregates. Low aggregate crushing value indicates strong aggregates, as the crushed fraction is low. Thus the test can be used to assess the suitability of aggregates with reference to the crushing strength for various types of pavement components.
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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
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civil4m.com. You need to apply 40 tonnes of load for 20mm aggregates in period of 10 minutes by uniform loading, at the end of 10 minutes, total load will reach to 40 tonnes. Check your CTM loading unit, in most of the cases it is Kn/sec. do calculation to arrive at rate of loading required to apply load for 10 minutes with uniform loading.
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The aggregate crushing value should not be greater than 30% for the surface course and 45% for the base course. Impact Test. Gives a relative measure of the resistance of an aggregate to suddenly applied load. Aggregate impact value should not be greater than 30% for a surface course and 35% for a base course. Abrasion test.
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Aggregate crushing value = (W2 x 100) / (W1-W) W2 =Weight of fraction passing through the appropriate sieve W1-W =Weight of surface dry sample. The mean of two result to nearest whole number is the aggregate crushing value. Result The aggregate crushing value of the given sample= Aggregate Crushing Values for Roads and Pavement Construction
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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 The apparatus of the aggregate crushing value test as per IS: 2386 (Part IV) – 1963 consists of:
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Concept and significance of the Aggregate crushing value test. The ‘ aggregate crushing value test ` gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under
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The crushed aggregate sample which is finer than 2.36 mm is separated and expressed as a percentage of the original weight taken in the mold.The percentage of weight passed through the 2.36m IS sieve is known as the Aggregate crushing value.. In situations, when the aggregate value is 30 or higher the result may be a mistake and in such cases, the “ten percent fines value” should be
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The apparatus as per IS 2386 (Part-IV) 1993 consist of,. Impact Testing Machine : A testing machine weighing 45 to 60 Kg and having a metal base with a heavy lower surface of not less than 30 centimetre in diameter. It is supported on plane and level concrete floor of minimum 45 cm thickness. The machine should have provision for fixing its base.
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Aggregate Crushing Value = 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.
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Explanation: Crushing test: This test is carried out to assess the strength of coarse aggregate when a compressive load is gradually applied.; Aggregate crushing value = (W 2 /W 1) × 100 where, W 1 = Total weight of the dry sample . W 2 = weight of material passing through 2.36 mm IS sieve. The aggregate crushing value for the surface course should be within 30% and for the base course, it
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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. 2.Apparatus Required Fig. 1: Balance
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