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observations on determination of flakiness and elongation indices

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Is the 'Combined Flakiness and Elongation Index' of ...

It is mentioned in the test procedure (BIS/MoRTH) that while doing combined flakiness and elongation test, the flaky aggregates should be separated initially from the test sample, and the rest is ...

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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 ...

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Determination of elongation index - LinkedIn SlideShare

Dec 18, 2017· The elongation index is found by separating the elongation particles and expressing their mess as a percentage of the mass of sample tested. From the experiment, the mean 14.2 (sieve 10mm) and elongation index is 9.18%. As a conclusion, the sample that we tested are flaky and elongation, which is there are not suitable to use in parameter design.

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FLAKINESS AND ELONGATION INDEX OF AGGREGATE

Elongation 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 =

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Elongation Index Test - Labguider

Determination of elongation index of coarse aggregate is explained below. Significance of Flakiness & Elongation Index • The degree of packing of the particles of one size depends upon their shape. • Due to high surface area to volume ratio, the flaky and elongated .

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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.

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Labs - Civil Engineering

Determination of the flakiness and the elongation index for the given aggregate sample 2. Standard test method for resistance to degradation of small size coarse aggregate by abrasion and impact in los Angeles abrasion machine

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Flakiness & Elongation Test Gauges, Civil Laboratory ...

Flakiness Gauge: Used for Determination of flakiness index of coarse aggregate It consists of a steel frame with a sliding panel having slots of different dimensions. Elongation Gauge: Used for determination of elongation index of aggregates. It consists of a steel frame having slots of different dimensions. The frame is fixed on a hard wooden ...

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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.

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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.

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Flakiness And Elongation Index TEST Of Coarse Aggregate ...

Flakiness and Elongation Index TEST of Coarse Aggregate Flakiness index and Elongation index 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.

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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 ...

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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 ...

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FLAKINESS OF AGGREGATES FOR HIGHWAY CONSTRUCTION: ITS ...

Elongation index is defined similarly. The paper discusses: (1) particle shape and its numerical determination; (2) the physical requirements of coarse aggregates, including an illustrative example; (3) the aggregate manufacturing process, including the use of an impactor; (4) the field tests; and (5) the analysis of the field tests, especially ...

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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.

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Exp 2 Aggregate Angularity Number - Civil Engineers PK

EXPERIMENT NO.2 Determination of Angularity Number for the given aggregate sample.. This test is also carried out for determining shape of the aggregates. Based upon shape the aggregates may be classified as Rounded, Angular or Flaky.

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CE 354 Transportation Engineering Sessional I (Lab Manual)

Ten Percent Fines Value), and shape characteristics (Flakiness Index, Elongation Index and Angularity Number) of aggregates used in roadway construction. The test procedures are described as per BS: 812:1975 (PART 1, 2, 3) standards. Second section describes the detail

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Elongation Index Test on Coarse Aggreagtes

Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than one and four-fifth times (1.8 times or 9/5 times) their mean dimension. It is measured on particles passing through mesh size of 63mm and retained on mesh size of 6.3mm. Necessity of Elongation Index Test Presence [.]

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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.

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Civil Engineering: Flakiness and Elongation Index of ...

Dec 12, 2017· Flakiness and Elongation Index of Coarse Aggregate Particle shape and surface texture influence the properties of freshly mixed concrete more than the properties of hardened concrete. Rough-textured, angular, and elongated particles require more water to produce workable concrete than smooth, rounded compact aggregate.

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Determining Flakiness Index

DETERMINING FLAKINESS INDEX TXDOT DESIGNATION: TEX-224-F CONSTRUCTION DIVISION 2 – 2 EFFECTIVE DATE: AUGUST 2016 3.3 Allow the sample to cool to room temperature. Quarter the aggregate sample to obtain a minimum of 200 particles passing the 7/8-in. (22.4-mm) sieve and retained on the 1/4-in.

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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 ...

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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.

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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.

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Flakiness Index Test for Aggregates

Flakiness Index = [W 2 / W 1] x 100. Where, W 2 = Weight passed from 0.6 x d mean size. W 1 = Total weight of aggregates. Flakiness Index of aggregates used in road construction should be less than 15% and normally does not exceed 25%. RELEVANCE AND IMPORTANCE It is not desirable to use flaky particles in construction of roads especially in ...

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Aggregates: Desirable Properties and list of tests (Part ...

Dec 29, 2017· Flakiness Index = Result The flakiness Index of the given sample of aggregate is _____ 2. Elongation Index The elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than one and four fifth times [1. 8] times their mean dimension. The elongation test is not applicable to size ...

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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 ...

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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 :

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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 ...

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Proportional Caliper Device

This test is to determine the percentage of flat particles (flake), elongated particles (needles), or cover both aggregates, as measured by the ratio of width to thickness, the amount of ductility and the ratio of length to thickness is achieved.

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