For determination of flakiness index of coarse aggregate, where the size of the coarse aggregate are larger than 6.3mm . Reference Standards. IS : 2386 (Part I) – 1963 – Method of test for aggregates for concrete (Part I) …
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Flakiness index Flakiness index of aggregate is the percentage by weight of aggregate particles the least dimension of which is less 0.6 of their mean dimension. The test is applicable to sizes larger than 6.3mm. Apparatus …
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Testing of Coarse Aggregate. A. Shape and Size Test : The shape and size of aggregates can be determined by flakiness index and elongation index tests. Flakiness Index Test. Flakiness index is defined as the ratio of weight of aggregates whose least dimension is less than 0.6 times of their mean dimension to the weight of the sample taken.
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The flakiness index of an aggregate is the percentage by weight of particles in it whose least dimension (thickness) is less than three-fifths of their mean dimension. (The test is not applicable to sizes smaller than 6.3 mm). This method covers the determination the flakiness of the coarse aggregate. Procedure for flakiness test
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Sl No: Type of pavement Maximum limits of flakiness index, % 1 Bituminous carpet 30 2 (i) Bituminous / Asphaltic concrete 25 (ii) Bituminous Penetration macadam (iii) Bituminous surface dressing (single coat, two coats & precoated) (iv) Built up spray grout 3 (i) Bituminous macadam 15 (ii) WBM base course and surface course Related Tags: the ...
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The Flakiness Index test determines the percentage by weight of aggregate particles whose least dimension is less than 0.6 of their mean dimension. This test is applicable only to coarse aggregates. To calculate the flakiness index of a sample, the weight of each fraction of aggregates passing and retaining on specified sieves is noted.
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Download scientific diagram | Flakiness index Test of Aggregate from publication: Factors Identification and Conformance of Quality of Cement and Coarse Aggregate used at Gautama Buddha Airport ...
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IN THIS ARTICLE WE WILL LEARN ABOUT TEST METHOD OF FLAKINESS AND ELONGATION INDEX AND SPECIFICATION FOR AGGREGATE DETERMINATION OF FLAKINESS INDEX AS PER IS 2386: PART 1 SCOPE -This method of test lays down the procedure for determining the flakiness index. SAMPLE - A quantity of aggregate shall be …
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SPECIFICATION / LIMITS OF FLAKINESS –. The combined flakiness and elongation index so obtained shall not exceed 40% for uncrushed and crushed aggregate. SCOPE – This method of test lays down the …
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The document discusses several aggregate tests including: 1) The flakiness index test which determines the percentage of particles that are flatter than a specified ratio. 2) The elongation index test which determines the percentage of particles longer than a specified ratio of their mean dimension. 3) Sieve analysis to determine particle size distribution. 4) Organic impurities …
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The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of the mass of the sample tested. This test is not applicable to aggregate passing 6.30mm sieve and retained as 63.0mm sieve. Elongation index Aggregate particles are classified as elongation when they have a length ...
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aggregate particles. The flakiness index can be obtained from the shape/volume parameters (length, width and thickness) of the aggregates. The use of flaky aggregate ... In South Africa, the standard test method used for the determination of flakiness index of coarse aggregates is contained in TMH1 Method B3 (TMH 1 1986). In this method, a
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Aggregate Shape Test Objective. To determine the combined flakiness and elongation Index of the given coarse aggregate sample. IS Standards used:IS: 2386(Part-I)-1963 (Reaffirmed 2007) Need and scope:Definition of Combined Flakiness and Elongation Index: It is the sum of the flakiness index of a given aggregate sample and the elongation index of the …
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This document describes procedures to determine the flakiness and elongation indices of an aggregate sample. The flakiness index is the percentage of particles thinner than 60% of their mean thickness, while elongation index is the percentage longer than 180% of mean length. ... • Angular shape of the particles is desirable in granular base ...
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Use this test method to determine the percentage of coarse aggregate that are flat with a thickness of less than approximately 2/3 of its nominal size. Flakiness Index is only required …
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To determine the combined flakiness and elongation Index of the given coarse aggregate. sample. A APPARATUS: A.2 Weighing Balance: A Balance of suitable capacity accurate to 0% of the mass of the ... The flakiness index of an aggregate sample is determined by sieving the sample of aggregates through specified sieves to separate the aggregates ...
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What is the flakiness index of coarse aggregates? ... 0.6, where 1 stand for the mean dimension of aggregate to be passed & 0.6 for the width or flaky side of the aggregate. In other words, Flakiness index ...
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Shape tests on coarse aggregates such as flakiness index and elongation Index, its importance in concrete construction, methods of determination is discussed. ... The Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than nine-fifths (1.8times) their mean dimension. This test ...
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The flakiness index of a given sample of coarse aggregate is calculated by using the following formula: Flakiness index = B/A×100. where, A is the total weight of sample taken B is the total weight of material passing through various slots in a thickness gauge. Apparatus. Balance, Thickness gauge,
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In this article, we will discuss the flakiness index. A. Importance of Flakiness Index The Flakiness Index of aggregate is the percentage by weight of aggregate particles whose least dimension is less than 0.6 of their mean dimensions. This test is applicable to aggregates having a size larger than 6.3mm. To determine […]
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Flakiness Index. The flakiness index of aggregates is the percentages by weight of particles whose least dimension (thickness) is less than 3/5 th (0.6) of their mean dimension. The test does not apply to sizes smaller than 6.3 mm. [For example, the mean sieve size for an aggregate piece passing through 50 mm and retained on 40 mm sieve is (50 ...
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Flakiness and Elongation Index Test are very important tests to be performed on aggregate in the laboratory. This test gives the percentage of flaky and elongate aggregate present in the total aggregate sample. Aggregate shape, size, and surface texture majorly affect the properties of freshly mixed concrete more than t…
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The Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than nine-fifths (1.8times) their mean dimension. Flakiness and elongation tests are not applicable to sizes smaller than 6.3mm. Test procedure:
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The flakiness index of an aggregate is the percentage by weight of particles in it whose least dimension is less than 0.60 times their mean dimension. ... For a constant aggregate cement ratio, if the coarse aggregate is increased at the expense of sand, maintaining total aggregate cement ratio constant, then the total surface area of the ...
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Flakiness Index and Elongation Index: The flakiness Index is determined for the coarse aggregate of size greater than 6.3mm. The flakiness index of aggregates is the percentage by weight of particles whose least dimension is less than three fifth or 0.6 times of their mean dimension. The Elongation Index of an aggregate
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Shape test on coarse aggregate – Flakiness index test. The particle shape of aggregates is determined by the percentages of flaky and elongated particles contained in it. for concrete and construction of bituminous works the …
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1.1 This test method covers the determination of the percentages of flat particles, elongated particles, or flat and elongated particles in coarse aggregates. Two procedures, Method A and Method B, are presented in this standard. Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications.
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Aggregate Classification Devices - Humboldt Mfg. Aggregate Classification Devices. ... in coarse aggregates . H-1684 Flakiness Gauge for Classification of Aggregate.
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Shape tests on coarse aggregates such as flakiness index and elongation Index, its importance in concrete construction, methods of determination is …
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The flakiness index of the aggregate will give the idea about the thickness of the aggregate. #5 Elongation Index of Coarse Aggregate ( IS 2386 Part I -1963) The elongation index of the aggregate is the percentage by the weight of the particles whose greatest dimension or the length is greater than 1.8 times of their mean dimensions.
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Fig. 3: Thickness Gauge- For Flakiness Index. Thickness Gauge have width equal to 0.6 times the mean dimension of the aggregate. The tolerance on dimensions shall be +/- 0.20 mm for dimensions equal to or more than 50 mm and +/- 0.10 mm for dimensions less than 50 mm. ... The Flakiness Index on an aggregate is = Total weight passing Flakiness ...
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The flakiness index for the three types of aggregates was determined according to BS 812 part 1:175; the results are shown in Table 3. ... including asphalt penetration 60/70 according to Bina ...
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Coarse aggregate constitutes the biggest part of concrete. It is desirable that aggregates are of desired properties. Two shape tests namely Elongation Index Test and Flakiness Index Test are used for selection of proper aggregates. ... Flakiness Index It is the percentage by weight of particles in it whose least dimension is less than three ...
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This section of BS 812 describes the method for determining the flakiness index of coarse aggregate. Aggregate particles are classified as flaky when they have a thickness of less than 0.6 of their mean sieve size. The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of ...
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For determination of flakiness index of coarse aggregate, where the size of the coarse aggregate are larger than 6.3mm . IS : 2386 (Part I) – 1963 – Method of test for aggregates for concrete (Part I) Particle size and shape. …
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impurities for fine aggregate and flakiness index, elongation index, aggregate impact value, aggregate crushing value, 10%fines value and Los Angeles abrasion value for coarse aggregate. It was seen that the most widely used aggregate types in Sri Lanka during the last two years were crushed rock as coarse aggregate and river
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