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72. PHYSICAL REQUIREMENTS OF AGGREGATES FOR SUB-BASE, BASE COURSE AND BITUMINOUS SURFACING LAYERS (As per Rural Roads Manual) Layer Test Test Method Requirement 09/13/14 (Percent. Max.) Sub-base course Aggregate Impact value IS: 2386 (Part 4) -1963 50 Flakiness Index IS: 2386 (Part 1) -1963 40 Moisture or water absorption …
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This test, prescribed by BS 812: Part 110:1990, assesses the resistance of an aggregate to crushing, indicating its ability to withstand compressive loads.
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Report the mean as the Aggregate Crushing Value, unless the individual results differ by more than 0.07 times the mean value. In this case repeat the test on ... a mass of material to determine the aggregate 10% fines value. b) Test specimen in a dry condition (i) Sieve the entire dried test portion on the 14 mm and the 10 mm test sieve to ...
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Introduction on aggregate crushing value apparatus - Download as a PDF or view online for free. ... Two tests should be conducted. 7. CALCULATION: • Aggregate crushing value = B/A x • The result should …
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In the Aggregate Crushing Value test, a sample of aggregates is subjected to a gradually increasing compressive load until failure occurs.The resulting crushing value—expressed as a percentage of the original mass—indicates the material's resistance to crushing.Lower ACV values signify stronger aggregates that are better suited for high-load …
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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 are subjected to a specified load under standardized conditions.
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• The load was released and the whole of the material removed from the cylinder and sieved on a 2.36mm IS-sieve or the appropriate sieve if the sample size is not a standard one. The fraction passing the sieve was weighed (weight B). • Two tests were made Aggregate Crushing Value Test Video Prepared for tusharhsonawane.wordpress 37
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In the Aggregate Crushing Value test, a sample of aggregates is subjected to a gradually increasing compressive load until failure occurs.The resulting crushing …
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The aggregate crushing value test is performed on coarse aggregates to determine their resistance to crushing under a gradually applied compressive load. This test measures …
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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. Results The mean of the two results shall be reported 7. Video Aggregate Crushing Value Test 8. Download Download PDF
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The values of aggregate crushing test agree in general with that of aggregate impact test. The crushing strength test is most significant as far as the conditions to which the aggregates is likely to be subjected in practice are …
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Test for determination of Clay, fine silt & fine dust. Test for determination of Organic Impurities. Test for determination of Specific Gravity. Test for determination of Bulk Density & Voids. Test for determination of Aggregate crushing value. Test for determination of Aggregate Impact Value. Test for determination of Aggregate abrasion value ...
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Recommended Aggregate Impact Test Values Aggregate Impact Value Classification <20% Exceptionally Strong 10 – 20% Strong 20-30% Satisfactory for road surfacing >35% Weak for road surfacing ... • Aggregate …
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4. Aggregate crushing value 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 aggregate crushing value shall not exceed 30%
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Mechanical Properties of Aggregates Aggregate Crushing Value Test (BS:812, part 3) Procedure • The material to be tested should pass a 14.0 mm (1/2 in.) sieve and be retained on a 10 mm (3/8 in.) sieve. • Dry the sample in an oven at 100-110 0 C for four hours. • Place the sample in a standard cylindrical mould and tamp it. • Put a plunger on the top of the aggregate …
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Impact value The impact values for coconut shell aggregate ranges from 1.29 to 1.32%. Value indicates that it can also be used as construction material. 5. Crushing value The average crushing value is 1.16% which is lower than 30% maximum specified in the code. 6.
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The following tests are generally performed to find out the standard aggregate: Test for determination of Flakiness Index. Test for determination of Elongation Index. Test for …
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Aggregate Crushing Test - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. This document describes the aggregate crushing test used to determine the strength of aggregates used in road construction. The test measures an aggregate's ability to resist crushing under compressive loads by applying a load …
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2. Impact, 10% Fines & Crushing Tests Quarry plant such as crushers, screens, conveyors, etc. are all subject to wear and these crushing tests can indicate the magnitude of the problem for design purposes. PROCEDURE - Aggregate Impact Value (SS 1974) 1. The apparatus consists of a steel test mould with a falling hammer as shown in Figure 1.
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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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Aggregate crushing value test: The 'aggregate crushing value' gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. The aggregate crushing value should not be more than 45% for aggregates used for concrete other than for wearing surfaces. The aggregate crushing value should not be ...
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Aggregate Impact Value • The aggregate Impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact. Apparatus • Impact testing machine • A cylindrical steel cup of internal diameter 102 mm and depth 50mm • IS Sieves of sizes 12.5, 10 and 2.36 mm • A cylindrical metal measure of internal diameter ...
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Aggregate Test - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Aggregate crushing, impact, and abrasion values are tests to determine the strength of coarse aggregates for construction. The aggregate crushing value test involves placing dried aggregates in a cylinder, compressing under 40 tons of …
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AGGREGATE CRUSHING VALUE TEST 1. Objective The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied …
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Aggregate crushing value test is done the find the actual crushing value of aggregate. We Need to carry out this test, To find out how much resistance does the aggregate has against the surface abrasion under traffic.
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getting reproducible results. On the contrary, the aggregate crushing test is simple, rapid and gives fairly consistent results. Application of Aggregate Crushing Test: 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.
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Download scientific diagram | Crushing Value Test for Coarse Aggregates. (a) apparatus to crush aggregate; (b) compression machine ; (c) aggregates after crushing and sieving. from publication ...
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3. The impact test is a type of quality control test for highway pavements that is used to determine the suitability of aggregates for use in highway pavement construction. Aggregates used in road construction should be strong enough to resist abrasion, crushing, and impact load. Objective Based on the impact value, we can decide whether the coarse …
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Mechanical Prosperities of Aggregate :Mechanical Prosperities of Aggregate : Aggregate Crushing ValueAggregate Crushing Value • The "aggregate crushing value" gives a relativeThe "aggregate crushing value" gives a relative measure of the resistance of an aggregatemeasure of the resistance of an aggregate to crushingto crushing under a ...
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Aggregate Crushing Value Apparatus. A 15 cm dia. Steel ; cylinder with the plunger and base plate. A straight metal tamping rod 16mm in diameter and 45 to 60cm long rounded at one end.
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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 5.7 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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Key Points of IS 383- Specs for coarse and fine aggregate from natural sources for concrete Aggregate Crushing Value (IS 2386 Part –IV) • The aggregate crushing value provides a relative measure of resistance to crushing under gradually applied crushing load. • Dry aggregates passing through 12.5 mm sieves and retained 10 mm sieves are ...
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5. The assembly is then kept under compression testing machine and total load of 40 tonnes is applied uniformly during 10 minutes. 6. The load is released, the aggregate is taken out and sieve on 2.36 mm sieve. The friction …
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Hardness of aggregates Hardness of aggregates is the ability of the aggregate to withstand wear or load or applied pressure. This hardness is depending on the type of parent rock The test that can obtain the hardness is …
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5. b)CLASSIFICATION BASED ON SOURCE: >Natural aggregates: This kind of aggregate is taken from natural deposits without changing their nature during the process production such as crushing and grinding. >Manufactured (synthetics) aggregates: This is a kind of man-made materials produced as a main product or an industrial by-product. Some example are blast …
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11. Aggregate crushing value Test(IS-2386-4(1963)) • Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load. Aggregate crushing value is a numerical index of the strength of the aggregate and it is used in construction of roads and pavements.
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