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observations on determination of flakiness and elongation indices

IS 2386-1 (1963): Methods of Test for Aggregates for ...Determination of materials finer than 75-micron, Determination of flakiness index, Determination of elongation index, and Determination of angularity number. 2. SIEVE ANALYSIS 2.1 Object - This method covers the procedure for determination of particle size distribution of fine, coarse and all-in-aggregates by ...Determination of the Flakiness and the Elongation Index ...Determination of the Flakiness and the Elongation Index for the Given Aggregate Sample.7.3. Shape Tests for Aggregates 7.3.1 Flakiness indexThe equipment used in the flakiness index are also used in the elongation index test except a metal length gauge instead of a thickness gauge shown in Figure 7.3.2. Table 7.3.4 Particulars of test sieves Nominal aperture size (square hole perforated plate 450 mm or 300 mm Diameter) 50.0 mm 37.5 mm 28.0 mm 20.0 mm 14.0 mm 10.0 mm 6.3 mm

Flakiness and Elongation - PCTE

Flakiness and Elongation Flakiness Index Sieve Set UTA-0410. When an aggregate particle has a thickness less than 0.6m of its mean sieve size, it is considered flaky. The aggregate to be classified is separated into seven sieve fractions from 6.3 to 63 mm and each fraction is examined separately.Elongation index and flakiness index of coarse aggregate ...Elongation index and flakiness index of coarse aggregate (BS 812 Part:1) Scope: The particle is considered as elongated if its length is more than 1.8 times the mean sieve size of the size fraction to which the particle belongs. Similarly, the particle is .Definition of Flakiness index and Elongation index | Civil ...Apr 07, 2013· Flakiness index. The percentage by weight of flaky particles present in a given test sample. Elongation index. The percentage by weight of the elongated particles present in a given test sample. Significance and use. The particle shape of the aggregate is determined by. The percentage of flaky and elongated particles that it contains. Its ...How to determine Flakiness Index and Elongation Index Test ...Theory of Flakiness Index and Elongation Index Tests The particle shape of aggregates is determined by the percentages of flaky and elongated particles contained in it. For base course and construction of bituminous and cement concrete types, the presence of flaky and elongated particles are considered undesirable as these cause inherent ...observations on determination of flakiness and elongation ...Flakiness index is the ratio of the thickness to the length of an aggregate Lanaro and Tolppanen (2002).A detailed research report on flakiness index by Kwan et al. (1999) revealed that a realistic measure of particle shape could be based only on measurement of flakiness and elongation indices.Combined effect of flaky and elongated aggregates on ...Combined effect of flaky and elongated aggregates on strength and workability of concrete has often been qualitatively expressed. This work aims at establishing the same quantitatively.determination of flakiness index test.Dec 18, 2017· determination of flakiness index test. 1. page | 1 civil engineering deparment dcc 3122 highway lab report title determination of elongation indexvalue course / session dcc 3122 – geotechnic and highway laboratory prepare by group group a group members 1. ainunyasmine binti haslan 03dka16f2023 2. mohd iqbal naqiuddin bin zulkipli 03dka16f2018 3.Determination of the Flakiness and the Elongation Index ...Determination of the Flakiness and the Elongation Index for the Given Aggregate Sample.

Flakiness and Elongation Index of Aggregate

Nov 16, 2019· Elongation Index. The Elongation Index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than 1.8 times their mean dimension. The elongation test does not apply to sizes smaller than 6.3 mm. Equipment. The Apparatus consists of the length gauge, sieves of the sizes specified in Table (a) and a ...FLAKINESS AND ELONGATION INDEX OF AGGREGATEElongation Gauge (mm) Weight Retained on Elongation Gauge (g) Percentage Weight Retained (%) 63 50 --50 40 81.00 40 25 58.5 31 25 --25 20 40.50 20 16 32.4 16 12.5 25.6 12.5 10 20.2 10 6.3 14.7 Total Table 3 : Recordings for Elongation Index 6. Calculation 1. The Flakiness Index on an aggregate is =Flakiness and Elongation Index of Aggregate - Gilson Co.Thickness Gauge (Flakiness Index) is a slotted stainless steel gauge for rapid hand trying of particles from the seven sieve fractions to determine the flakiness index. Length Gauge (Elongation Index) has six labeled openings between metal pins for measuring the length of particles from each of the six sieve cuts below 50mm, for elongation index determinations.How to determine Flakiness Index and Elongation Index Test ...Theory of Flakiness Index and Elongation Index Tests The particle shape of aggregates is determined by the percentages of flaky and elongated particles contained in it. For base course and construction of bituminous and cement concrete types, the presence of flaky and elongated particles are considered undesirable as these cause inherent ...observations on determination of flakiness and elongation ...Flakiness index is the ratio of the thickness to the length of an aggregate Lanaro and Tolppanen (2002).A detailed research report on flakiness index by Kwan et al. (1999) revealed that a realistic measure of particle shape could be based only on measurement of flakiness and elongation indices.

Flakiness & Elongation Index Test Gauges, टेस्ट गेज ...

AT-215: Flakiness (Thickness) Gauge: Used for Determination of flakiness index of coarse aggregates. It consists of a steel frame with a sliding panel having slots of different dimensions. AT-216: Elongation (Length) Gauge: Used for Determination of elongation index of aggregates. It consists of a steel frame having slots of different dimensions.What is the significance of Flakiness Index and Elongation ...Flakiness Index is the percentage by weight of particles in it, whose least dimension (i.e. thickness) is less than three-fifths of its mean dimension. Elongation Index is the percentage by weight of particles in it, whose largest dimension (i.e. length) is greater than one and four-fifths times its mean dimension.Elongation & Flakiness Index Test for Coarse Aggregate ...Sep 06, 2018· 4.2.1.3 Weight of total sample retained on elongation metal gauge : 322 + 216 = 538 gm Elongation Index: 538 / 2639 x 100 = 20.39% 5.0 Reporting of result: the elongation index is the total weight of the material return on the varies length gauge expressed as a percentage of total weight of the sample gauge. DETERMINATION OF FLAKINESS INDEX :

Flakiness & Elongation Index - Civil Engineering Laboratory

Flakiness & Elongation Index This method is based on the classification of aggregate particles as elongated when they have a length (greatest dimension) of more than 1.8 of their nominal size, this size being taken as the mean of the limiting sieve apertures used for .FLAT PARTICLES, ELONGATED PARTICLES, OR FLAT AND .1. If determination by weight is required, oven dry the sample to a constant weight at a temperature of 230° ± 9°F (110° ± 5°C). If determination is by particle count, drying is not necessary. 2. Sieve the sample of coarse aggregate to be tested in accordance with test method AASHTO T 27.Flakiness and Elongation Index (Shape Test) of Aggregates ...Mar 27, 2020· The evaluation of shape of the particles, particularly with reference to flakiness, elongation an angularity is necessary. Apparatus: The apparatus consists of; - A standard Thickness & Length Gauge - I.S. Sieves of sizes 63, 50, 40, 31.5,25, 20, 16, 12.5, 10 and 6.3 mm. - A balance of cap 5 kg to weigh the samples.Determination of flakiness index of the coarse aggregate ...Mar 27, 2020· Ref : IS 2386 (Part I) Purpose : To determine the flakiness index of the coarse aggregate. Significance : Coarse aggregate having flakier particles will adversely affect the strength of concrete. Definition : The flakiness index of the aggregate is the percentage by weight of particles in it, whose least dimension (thickness) is less than three fifth of their mean dimension.

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