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Index of Aggregate Particle Shape and Texture of coarse ...

Nov 01, 2004· Crushed granite from two crushing plants and gravels from two sources are used as coarse aggregates. The crushed aggregate from Plants 1 and 2 are attritioned for 6 and 10 h, respectively, at a speed of 33 rpm, using Deval attrition machine, to obtain the coarse aggregates with intermediate values of IAPST.

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FLAKINESS INDEX TEST FOR AGGREGATES | CIVIL …

Jun 15, 2020· AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. CODE OF REFERENCE:• IS 2386(Part 1):1963 Methods of Test for Aggregates of Concrete- Particle Size and Shape. Reaffirmed Dec 2016• ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles in Coarse Aggregates, American Society […]

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Flakiness Index Test for Aggregates - Civil Engineering ...

Jun 15, 2020· AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. CODE OF REFERENCE: • IS 2386(Part 1):1963 Methods of Test for Aggregates of Concrete- Particle Size and Shape. Reaffirmed Dec 2016 • ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles in Coarse Aggregates, […]

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How to determine Flakiness Index and Elongation Index Test ...

Jan 06, 2018· The Flakiness index of aggregates is the percentage by weight of particles whose least dimension (thickness) is less than three- fifths (0.6times) of their mean dimension. This test is not applicable to sizes smaller than 6.3mm. The Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is ...

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Flakiness Index Test on Aggregates for Shape

Flakiness index test is used to determine the particle shape of the course aggregate. The particle shape of the aggregates is obtained by the percentages of flaky and elongated particles accommodate in it. For base course and construction of cement concrete types, the presence of flaky and elongated particles are considered undesirable.

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Flakiness Index and Elongation Index Test on Coarse ...

The Flakiness index of aggregates is the percentage by weight of particles whose least dimension (thickness) is less than three- fifths (0.6times) of their mean dimension. This test is not applicable to sizes smaller than 6.3mm. The Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is ...

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how to improve flakiness index on a aggregate crushing plant

Concrete aggregates The requirements of AS . requirements, increase strength, or alter other properties of the concrete The correct, concrete batch plant, aggregate (either by Misshapen Particle test or Flakiness Index test), The aim is to obtain, by crushing, 10% of produced fines in.

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Recycled bedding and surround materials for gravity drains ...

Table 2 Coarse Aggregate Grading BS EN 13242 Coarse aggregate (Clause 4.3.2) Nominal pipe diameter, mm Aggregate size, mm Graded Single sized Not exceeding 140 - 4/10 ... Flakiness index BS EN 933-11 Tests for geometrical properties of aggregates. Classification

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Flakiness Index Test for Coarse Aggregates for Concrete 50 ...

Nov 30, 2020· 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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Lab Test on Aggregates at Site - CivilJungle

Flakiness Index of Aggregate. Aim: To determine the Flakiness of particles of Coarse aggregate / test on coarse aggregate more significant than 6.3 mm in size. Scope: This procedure covers all relative activity for the project site. Apparatus : Balance with an accuracy of 0.1% of the weight of a sample. Flakiness Index Gauge

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Determination of Flakiness and Elongation Index of given ...

Mar 24, 2020· The flakiness index is calculated by expressing the weight of flaky particles as a percentage of total weight of the sample. The expressions used in table are given below: Flakiness index of aggregate sample = 19.60 %. As the flakiness index is less than 30%, hence aggregate is considered desirable for use.

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What Is Coarse Aggregate | Requirements of Good Coarse ...

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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Exp 1 Flakiness and Elongation Index - Civil Engineers PK

Maximum permitted Elongated index is 35, 40 or 45% for aggregate sizes 2 ½'' – 2'', 1 ½'' – ¾'' & ½'' – 3/8''. Both Flakiness and Elongation tests are not applicable to sizes smaller then 6.3mm i.e. ¼'' sieve. Rounded aggregates are preferred in concrete roads (rigid pavements) as the workability of ...

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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 …

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Flakiness and Elongation Index of Aggregate

Sieves required are 63, 50, 40, 31.5, 25, 20, 16, 12.5, 10 and 6.3 mm (Based on requirement and Gradation of Aggregate). Fig. 3: Thickness Gauge- For Flakiness Index: Fig. 4: Length Gauge- For Elongation Index. Length Gauge have length equal to 1.8 times the mean dimension of the aggregate.

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What Is Coarse Aggregate | Properties Of Coarse Aggregate ...

Jun 22, 2021· Flakiness Index of Coarse Aggregates (IS 2386 Part I -1963) The flakiness index of the aggregate can be defined as the percentage by the weight of the particles whose minimum dimension or the thickness is less than the value 3/5th of their mean dimension. One can know the thickness of aggregate using the Flakiness Index. 5.

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Aggregate Angularity | Flakiness / Elongation Index ...

For more information read our blog Characteristics of Aggregates: Shape, Size, and Specific Gravity.. Void Content measures the angularity, sphericity, and surface texture of fine and coarse aggregates.; Proportional Calipers are efficient devices that quickly determine percentages of elongated and flat particles in coarse aggregate fractions.; Flakiness & Elongation of Aggregates is measured ...

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Soil, Aggregates and Laboratory A Testing Equipment B C D ...

Aggregates Flakiness Index and Particle Shape The frame of these grid sieves is ano-dized aluminium made and the grids are from stainless steel rod bars hav-ing diameter from 5 to 15 mm ac-cording to the slot widths. Sieve siz-es, slot width tolerances and rod bars diameter are checked one by one and meet the requirement of the EN 933-3 Standard.

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Specific Gravity of Coarse Aggregates: Its Importance ...

Sep 19, 2019· As per the definition given in the 'IS: 2386 (Part III) – 1963', (Indian Standard- Methods of Test for Aggregates for Concrete – Specific Gravity, Density, Voids, Absorption and Bulking), the specific gravity of coarse aggregates is the weight of the aggregates dried to constant weight in an oven at 100°C divided by its absolute volume including the natural voids within the aggregate ...

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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. ...

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AGGREGATE FLAKINESS INDEX VALUE (IS:2386-Part 1-1963 ...

May 08, 2013· Objective 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) Particle size and shape. Equipment & Apparatus Thickness gauge Sieves [63, 50, 40, 31.5, 25, […]

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Flakiness Index and Elongation Index Test on Coarse ...

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 the properties of hardened concrete.

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Aggregate - coarse aggregates, testing & limits

Sep 05, 2018· • 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. • Aggregate crushing value is a numerical index of the strength of the aggregate and it is used in construction of roads and pavements. 51.

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Lab Test on Aggregates at Site : CivilJungle - W R Eng.

Mar 22, 2021· The flakiness index is the total weight of the material passing the various thickness gauge; expressed as a % of the weight of the total sample gauged. Elongation Index of Aggregate. Aim: To determine the Elongated shape of particles of Coarse Aggregate/test on coarse aggregate greater than 6.3 mm in size. Scope:

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Determination of Flakiness Index | Construction Aggregate ...

DETERMINATION OF FLAKINESS INDEX of. Course Aggregate • Objective: To determine the flakiness index of the given sample of Coarse aggregate. • Apparatus and Materials: • Tray • Trowel • Aggregate sample (Coarse aggregates dry) • Length gauge • Sieves [63, 50, 37.5, 28, 20, 14, 10 & 6.3mm] • Balance [0-10 kg] THICKNESS GAUGE SPLITTER OR RIFFLE BOX • The shape of the aggregate ...

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Determination of flakiness index of the coarse aggregate ...

Oct 04, 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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THE CORRELATION BETWEEN AGGREGATE SHAPE AND …

river aggregate. Four different type of coarse aggregate was used. These aggregates were selected as flat, elongated, spherical and mixed shape. The shape properties were determined by digital image processing with two different views of aggregates. In this sense, the three dimensions of aggregate, the areas and perimeters of the views were ...

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ctii*ila fuQ: cr - Internet Archive

3.3 All.in-Aggregate --l'v1aterial composed of fine aggregate and coarse aggregate. 4 CLASSIFICATION The aggregate shall be classified as given in 4.1 and 4.2. In case of mixed sand (see 3.1.3), the manufacturer/ supplier should supply the individual sands to be mixed at site, at the time of batching. 4.1 Aggregates from Natural Sources

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Best Practices in Selection, Quality Assurance and ...

Flakiness Index – Tex-224-F Particle Size . o. Gradation – Tex-200-F, Part 1 . o. Maximum particle size Particle Shape . o. Flakiness Index – Tex-224-F . o. Coarse Aggregate Angularity – …

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Elongation index and flakiness index of coarse aggregate ...

weight of coarse aggregate is undesirable. The test is carried on aggregate sizes between 63 mm and 6.3 mm. Apparatus: 1- A balance of accuracy of 0.1% of the sample weight. 2- A set of sieves. 3- A special scale for elongation index. 4- A special scale for flakiness index.

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Flakiness Index and Elongation Index Test on Coarse ...

Jul 30, 2020· Procedure For the Test Flakiness Index of Coarse Aggregate:-. Sieve the aggregate sample with sieves specified in Table 1. Take sufficient quantity of aggregate to provide the minimum number of 200 pieces of any fraction to be tested. Then to separate the flaky materials, gauge each fraction for thickness on a thickness gauge of the pattern ...

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Shape test on Coarse Aggregates - Flakiness Index and ...

Apr 06, 2021· 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 presence of flaky and elongated particles are not suitable and cause failures and breaking during heavy loads.

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C050 Flakiness And Elongation Index apparatus

Flakiness And Elongation Index apparatus . Description. The Flakiness And Elongation Index Test Gauges is used to estimate the applicability of coarse aggregate used in the cement and concrete mixture, it can determine the percentage of the aggregate that over than 4.75mm size( needle or flake).

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14. AGGREGATES - cvut.cz

described by flakiness index or shape index (according EN 933-3, EN 933-4). 14.5.1 Flakiness Index The flakiness index (FI) is calculated as the mass of particles that pass the bar sieves with parallel slots, expressed as a percentage of the mass of the test portion. 14.5.2 Shape Index Shape index is determined only on the coarse aggregates.

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Shape tests on Coarse Aggregates- Flakiness index test and ...

Apr 08, 2021· The presence of elongated particles in the aggregate is undesirable for construction. Also, this shape test is made in coarse aggregate. The elongation shape test is not applicable for aggregates with a smaller size than 6.3 mm. For finding the flakiness index, …

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Determination of Flakiness and Elongation Index of Coarse ...

weight of coarse aggregate is undesirable. The test is carried on aggregate sizes between 63 mm and 6.3 mm. Apparatus: 1- A balance of accuracy of 0.1% of the sample weight. 2- A set of sieves. 3- A special scale for elongation index. 4- A special scale for flakiness index.

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