Flakiness & Elongation Index. Aggregate Impact Value. Aggregates used in road write your paper in 3 hours construction should be strong enough to resist crushing under traffic. Toughness is the property of a material to resist impact. Due to traffic loads, the road stones are subjected to the pounding action or impact and there is.
Apr 23, 2019 · Flakiness index and Elongation index test required to find out the shape of aggregate. We described the procedure of Combined Flakiness and Elongation index test of aggregate as per IS code with formula and calculation. Flakiness and Elongation index test called shape test too.
Sep 24, 2010 · The aggregate crushing value provides a relative measure of resistance to crushing under gradually applied crushing load. The test consists of subjecting the specimen of aggregate in standard mould to a compression test under standard load conditions (Figure 1). Dry aggregates passing through 12.5 mm sieves and retained 10 mm sieves are filled in a cylindrical measure of 11.5 mm diameter and.
Aggregate crushing value test apparatus is used for measuring resistance of an aggregate to crushing. Made of Mild Steel comprising of: Cylindrical Cell, 150mm internal dia x 130 to 140mm height, Plunger, 148mm dia x 100 to 115mm height, Base Plate, 200 to 230mm square x 6mm thickness, Tamping Rod, 16mm dia x 450 to 600mm length.
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.
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.
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.
Flakiness and elongation index test Basic Points > Based on IS 2386 part 1 F.1 of agg.-% by v E.1 of agg-% by wt. of particles t. of particles whose least dimension, is less dimension is greater particles obtained. than 3/5th of their than 9/5th of their Shape Test. whose greatest % of flaky and elongated mean dimensionNot applicable for sizes mean dimension. less than 6.3mm.
10% Fine Value. This test is a measure of the strength of aggregate, which will normally be used in making concrete. It involves compression in a mould of a known mass of aggregate of single particle size and measuring the load required to reduce 10% of the particles to fine material.
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COMMENTS 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.
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The 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.
Elongation index of the aggregate respectively. 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.
Theory of Flakiness Index and Elongation Index Tests. 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 greater than nine-fifths (1.8times) their mean dimension. This test is not applicable for sizes smaller than 6.3mm.
Flakiness Index Test on Aggregates for Shape. Therefore, the evaluation of the shape of the particles, particularly with respect to flakiness and elongation is necessary. The 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.
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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