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Jun 05, 2016· Flaky and elongated particles are considered undesirable for base coarse construction as they may cause weakness with possibilities of braking down under heavy loads. BS-1241 specifies a Flakiness index not exceeding 30% irrespective of the aggregate size.
Read MoreDETERMINING 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 …
Read MoreJun 27, 2017· Angular particles posses well-defined edges formed at the intersection of roughly planar faces. Flaky particles have thickness much smaller than the other two dimensions whereas Elongated particles have lengths considerably larger than the other t...
Read MoreChapter 2 – Bituminous Tex-224-F, Determining Flakiness Index Manual of Testing Procedures 1 8/99 – 10/04 Tex-224-F, Determining Flakiness Index Overview Effective date: August 1999 to October 2004. This procedure discusses how to determine the number of flat or elongated particles in a coarse aggregate material. Apparatus
Read MoreMay 08, 2013· Objective For determination of elongation index of coarse aggregate, where the size of the coarse aggregate are larger than 6.3 mm. Reference Standards IS: 2386 (Part I) – 1963 – Method of test for aggregates for concrete (Part I) Particle size and shape. Equipment & Apparatus Length gauge Sieves (63mm,50mm,40mm,31.5mm,25mm,20mm,16mm,12.5mm,10mm) Balance (0-10kg) Oven …
Read MoreFlakiness & Elongation of Aggregate; Determinations for the flakiness index and flakiness and elongation of aggregate use a British Standard classification system consisting of a Thickness Gauge for determining flakiness index and a metal Length Gauge for determining elongation index. Aggregate is separated into seven sieve fractions from 63 ...
Read MoreProportional Calipers are efficient devices that quickly determine percentages of elongated and flat particles in coarse aggregate fractions. Flakiness & Elongation of Aggregates are measured using a thickness gauge and a length gauge to hand-try particles when determining flakiness index and elongation index.
Read MoreThe flakiness of aggregate is determined by measuring the thickness of individual particles. Hence we offer thickness gauge and length gauge to check flakiness and elongation index of the aggregate respectively. Specifications: Model: Description: Flakiness Gauge SL-AG-001: Used for Determination of flakiness index of coarse aggregates. It ...
Read MoreThe Flakiness Index of an aggregate is the mass of particles in that aggregate which will pass the appropriate slot or slots for the individual size fraction expressed as a percentage of the total mass of that aggregate. The width of the slots is de termined by multiplying the mean of upper and lower sieve size for the slot by 0.6. 933.03 Equipment
Read MoreELONGATION INDEX = (wt of aggregate retained on specified gauge) / (total wt of aggregate taken) Flakiness index is the % by weight of particles whose least dimension is lesser than 3/5 of the mean dimension ... what do u mean by elongation & flakiness of aggregate?.. Answer / feroz.
Read MoreFlakiness sieves: Controls aggregates testing equipment. Enter now! ... Used to determine if aggregate particles are to be considered flaky, i.e. their thickness is less than 0.6 of their nominal size. ... 15 kg complete set; To evaluete the thickness and the elongation index of the aggregates particles, thickness gauge code 47-D0540 and length ...
Read MoreAug 11, 2014· The flakiness index test (FI) is not applicable passing 6.30 mm or retaining 63.0 mm test sieve. Testing procedure. The dried aggregates sample is allowed to passing and retained on a set of sieve. The weight of retained aggregate on each sieve is …
Read MoreFlakiness 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.
Read MoreElongation 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 ...
Read MoreCOMMENTS Flakiness Index came out to be 52%, which exceeds the limit of 45% so this sample is unsuitable for use although its Flakiness Index is 26%, which is within the limits of 30%. 2.7. Recommendations for Flakiness and elongation The shape tests give only a rough idea of the relative shapes of aggregates.
Read MoreThe flakiness index of course aggregate is defined in percentage by weight of aggregate particles and least dimension (thickness) of those particles should not be less than 0.6 times their mean area. Flakiness index test is not applicable for aggregates sizes smaller than 6.3mm.
Read MoreThe standard flat and elongated particles in coarse aggregate test is: ASTM D 4791: Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregates; Background. Flat or elongated aggregate particles can, if present in sufficient number, (1) impede compaction or (2) affect HMA behavior by fracturing during compaction.
Read MoreIllinois Test Procedure 205 Insoluble Residue and Magnesium Oxide In Coarse Aggregate 73 Illinois Test Procedure 327 Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus 77 Hard copies uncontrolled . Manual of Aggregate Quality Test Procedures April 16, 2019
Read MoreDec 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.
Read MoreThus, evaluation of shape of the particles, particularly with reference to flakiness and elongation is necessary. 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.
Read MoreElongation 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 considered as flaky if its thickness is less than 0.6
Read MoreLASER-BASED APPROACH FOR DETERMINING FLAKINESS INDEX OF AGGREGATES USED IN PAVEMENTS J ANOCHIE-BOATENG, J KOMBA and J O'CONNELL ... to compute flakiness index of the aggregate samples. The computed flakiness indices ... the standard test method used for the determination of flakiness index of coarse aggregates is contained in TMH1 Method B3 ...
Read MoreSep 05, 2018· In this video, i had given full detail practical procedure of determining flakiness and elongation index of coarse aggregate.
Read MoreDec 06, 2016· Flakiness and Elongation of aggregates and Concrete properties Published on December 6, 2016 December 6, 2016 • 27 Likes • 9 Comments
Read MoreMay 08, 2013· Objective For determination of elongation index of coarse aggregate, where the size of the coarse aggregate are larger than 6.3 mm. Reference Standards IS: 2386 (Part I) – 1963 – Method of test for aggregates for concrete (Part I) Particle size and shape.
Read MoreMar 03, 2012· Elongation value is 0% because the aggregate is rounded so no any retain value. Aggregate quality for road construction will also influence the road performance. The flakiness and elongation rocks are not suitable for road construction because this type of rocks will make the road surface not balance and easy to damage.
Read MoreApr 08, 2013· Types of aggregate, qualities, fineness mod and Aggregate crushing value test- in hindi Part-7 - Duration: 36:04. Technical Atyachar 12,119 views
Read MoreINDEX OF A COARSE AGGREGATE SCOPE The Flakiness Index of a coarse aggregate is determined by gauging screened-out fractions with the appropriate slot(s) given in Table I below. Aggregate retained on the 75 mm and passing the 4,75 mm sieve is not included in the test. Definition The Flakiness Index of a coarse aggregate is the mass of particles ...
Read MoreThe mass of all flaky particles (passing appropriate slots) as percent of the sample is the flakiness index. Meets BS 812. Void Content Apparatus, Fine Aggregates— H-1680A. Use to determine the uncompacted void content of a fine aggregate sample. Indicates the angularity, sphericality, and workability of fine aggregate in a mixture.
Read MoreFlakiness 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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