Processor Flakiness Index Coarse Aggregate

Jun 22 2021 Coarse Aggregate Meaning. Aggregate which has a size bigger than 4.75 mm or which retrained on 4.75 mm IS Sieve are known as Coarse aggregate.. Origin Of Aggregates. The aggregates are generally acquired by blasting in stone quarries or breaking them by hand or by crusher machines.. The aggregates manufactured by machine-crushed consist of stones of various sizes whereas hand

Mar 02 2017 Physical Properties of AggregatePhysical Properties of Aggregate Flakiness IndexFlakiness Index The flakiness index of aggregate is the percentage byThe flakiness index of aggregate is the percentage by weight of particles in it whose least dimensionweight of particles in it whose least dimension thicknessthickness is less than three .

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.

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.

Maximum permitted Elongated index is 35 40 or 45 for aggregate sizes 2 2 1 amp 38. Both Flakiness and Elongation tests are not applicable to sizes smaller then 6.3mm i.e. sieve. Rounded aggregates are preferred in concrete roads rigid pavements as the workability of .

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 78

Flakiness Gauge for Classification of Aggregate Particles H-1684 For determining flakiness index. Particle is flaky when its thickness smallest dimension is

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 95 times their mean dimension. It is measured on particles passing through mesh size of 63mm and retained on mesh size of 6.3mm.

Mar 24 2020 Flakiness index of aggregate sample 19.60 . Comments As the flakiness index is less than 30 hence aggregate is considered desirable for use. Procedure for determining Elongation index of aggregate sample Elongation index gauge. Perform sieve analysis on aggregate sample using coarse sieve shaker. Weigh the sample retained on each sieve

Mar 24 2020 Flakiness index of aggregate sample 19.60 . Comments As the flakiness index is less than 30 hence aggregate is considered desirable for use. Procedure for determining Elongation index of aggregate sample Elongation index gauge. Perform sieve analysis on aggregate sample using coarse sieve shaker. Weigh the sample retained on each sieve

Nov 16 2019 Coarse aggregate constitutes the biggest part of concrete. It is desirable that aggregates are of desired properties. Two shape tests namely elongation index test and flakiness index test are being useful for selection of proper aggregates.

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.

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.

Jun 15 2020 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 surface course.

15. The sum of flakiness index and elongation index should not exceed a 15 b 20 c 30 d 40 Answer c Clarification IRC recommends the combined flakiness and elongation index not to exceed 30. for the aggregate that should be used in a highway.

5 Grading 4.2 Flakiness index 5.1 Coarse aggregate When determined in accordance with BS 812 Section 105.1 the flakiness index of the combined When determined in accordance with BS 812 coarse aggregate shall not exceed 50 for uncrushed Section 103.1 using test sieves of the sizes given in gravel and 40 for crushed rock or crushed gravel.

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.

5.3.2 Flakiness Index. Flaky aggregate is defined as an aggregate particle with a least dimension thickness less than 0.6 of the mean of the smallest sieve size through which the particle passes and the largest sieve size on which the particle is retained. The flakiness index is defined as the percentage by mass of stones in an aggregate .

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.