— Several studies have looked at the effect of rock properties on abrasion resistance as well as the correlation between the Los Angeles abrasion value test aggregate crushing value aggregate impact value and rock properties [45 46 47 48 49 50 51 52] These studies have shown that if we have one of these values
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— Crushing value refers to a measure of the strength of the aggregate Hence the aggregates should contain least crushing value Objective To find out the aggregate crushing value of coarse aggregates To examine the relevance of aggregates to be applied in various types of road pavement Method The test sample It comprises of
Course objective 4 Course outcome 4 Do s and Don ts 5 List of experiments 6 3 SYLLABUS TRANSPORTATION ENGINEERING I LABORATORY 1 To determine the aggregate crushing value of the given specimen 2 To determine the aggregate impact value of the given specimen aggregates crushing test The aggregate crushing value
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— Aggregate Crushing Value Test Objective To determine crushing strength of given aggregate sample IS Standards used IS 2386 Part 4 and BS 2009 Need and scope This is one of the major mechanical properties required in a road test evaluates the ability of the aggregates used in road construction to withstand the stresses
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— Objective For determination of the aggregate crushing value of coarse aggregate which passes mm IS sieve and retained on 10 mm IS sieve Aggregate Crushing Value Test Appratus; Preparation of sample Test sample consist of aggregate passing a IS sieve and retained on a 10mm IS sieve The aggregate to be tested
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The average aggregate crushing value ACV and the aggregate impact value AIV obtained from the evaluations is % and % respectively and are within the acceptable standard limits The specific gravity and water absorption gave average values of and % respectively while the flakiness index obtained from the analysis is %
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The method of test covers the procedure for determining the aggregate impact value of coarse aggregates OBJECTIVE To determine the aggregate impact value of a coarse aggregate APPARATUS 1 Aggregate impact testing machine 2 IS sieve 14mm 10mm 2 3 a cylindrical measure 4 rod and balance 5 Bristle brush 6 Weighing Scale
— 6 Aggregate crushing value % = W P / W x 100 W P = Weight of aggregate passing through IS Sieve W = Weight of aggregate taken for the test RESULT The mean average crushing value of aggregates is % INTERPRETATION OF RESULTS The aggregate crushing value is an indirect measure
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The Crushing Value test measures the ability of an aggregate to resist crushing under a compressive load It is a measure of the strength and toughness of the aggregate In this test a standard crushing load is applied to a prepared aggregate sample and the percentage of fines generated after the specified amount of crushing is determined
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— Figure 1 — Outline form of cylinder and plunger for aggregate crushing value test The surfaces in contact with the aggregate shall be machined and maintained in a smooth condition and preferably case hardened Tamping rod made out of straight iron or steel bar of circular cross section diameter of
— 6 Aggregate crushing value % = W P / W x 100 W P = Weight of aggregate passing through IS Sieve W = Weight of aggregate taken for the test RESULT The mean average crushing value of aggregates is % INTERPRETATION OF RESULTS The aggregate crushing value is an indirect measure
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— This test is similar to the Aggregate Crushing Test ACV which applies a standard force of 400kN and expresses the fines material as a percentage of the original mass known as the aggregate crushing value The granular sub base is subject to repeated loadings from various truck types causing high levels of stress at the contact points of
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— per cent material passing a specified sieve after crushing The procedure described in SABS Method 842 is followed Definition The 10 per cent Fines Aggregate Crushing Value is the force in kN required to crush a sample of 13 2 9 5mm aggregate so that 10 per cent of the total test sample will pass a 2 36 mm sieve 2 APPARATUS As in
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Table 2 — Guide to minimum mass of test portions required to obtain a suitable mass of material to determine the aggregate crushing value Grading of the aggregate A cylindrical metal measure for measuring the test samples of sufficient rigidity to retain its form under rough usage and having an internal diameter of 115 ± 1 mm and an
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5 — Procedure of Aggregate Impact value test The test sample normally aggregates sized mm to mm the aggregates should be dried by heating at 100 110 0C for a period of 4 hours and cooled
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— AGGREGATE CRUSHING VALUE TEST 1 Objective To determine the crushing value of road aggregates 2 Apparatus/Equipments Required 1 Steel cylinder of cm internal diameter with base plate and plunger The height of the cylinder may vary from 13 to 14 cm The thickness of cylinder walls may be cm 2
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— Objective of Test Reference Standard Equipment used for performing the Test Observations to be recorded Results to be presented Aggregate Impact Value 61 Aggregate Crushing Value 65 Silt Content 70 Bulking of Sand 75 Flakiness Index and Elongation Index 77 3 Tests on Reinforcement Steel 83
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— The apparatus of the aggregate crushing value test as per IS 2386 Part IV 1963 consists of 1 A 15cm diameter open ended steel cylinder with plunger and base plate of the general form and dimensions as shown in Fig 1 2 A straight metal tamping rod of circular cross section 16mm diameter and 45 to 60
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— Objective For determination of the aggregate impact value of coarse aggregate which passes mm IS sieve and retained on 10 mm IS sieve Reference Standards IS 2386 Part IV 1963 Methods of test for aggregate for concrete Part IV Mechanical Properties Equipment & Apparatus Aggregate Impact Test Machine; Sieves
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— The objective of the multi particle crushing test was to analyze the interaction and crushing of multiple particles with the same or different materials The sample is prepared by controlling the volume fraction of the constituent the test was terminated when the load was reached 50 kN The aggregate crushing value test followed the
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The method of test covers the procedure for determining the aggregate impact value of coarse aggregates OBJECTIVE To determine the aggregate impact value of a coarse aggregate APPARATUS 1 Aggregate impact testing machine 2 IS sieve 14mm 10mm 2 3 a cylindrical measure 4 rod and balance 5 Bristle brush 6 Weighing Scale
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