separating the flaky aggregates by sieving. the gauge to an accuracy of at least 0.1 percent of the weight of the test What is flakiness and elongation test? A sieve analysis (or gradation test) is a practice or procedure used in civil engineering and chemical engineering to assess the particle size distribution . In order to separate flaky particles, each fraction is then gauged individually for thickness on the metal gauge. Take minimum of 200 pieces from each fraction and weigh (A). HM-924 meets Indiana Department of Transportation standard ITM-224-18 and several other state agencies for flakiness index testing. Determine the particle size distribution of a test portion in accordance with Test Method WA 210.1 and after sieving keep . 20:00 Relative compaction . Balance of capacity 15kg and sensitivity 1gram. The width of the slot used in the thickness gauge Separation of Elongated Material- Each fraction shall be gauged individually for length on a metal length gauge of the pattern shown in Fig. Zero is hard, and every big tech company . : 2386 (part-1) 1963) AS 1141.15 . X 100 Elongation Index = (Y 1 + Y 2 + ) / (W 1 + W 2 + .) of 6.3 mm. Aggregates for Concrete cedd gov hk. . not applicable to the materials passing through the 6.30 mm IS test sieve or Retained on sieves (A) (g), Wt.of agg. 100% found this document useful, Mark this document as useful, 0% found this document not useful, Mark this document as not useful, This method describes the procedure for the determination of the Flakiness Index of, aggregate that has not more than 5% retained on a 26.5mm AS Test Sieve and no. It will agreed ease . Y = The weight of materials [For example, the mean sieve size for an aggregate piece passing through 50 mm and retained on 40 mm sieve is (50+40)/2 i.e. 2. concrete. Sieve the whole sample through the sieves mentioned in the columns (1) and (2) of the Table: 1. Elongated Aggregates IS sieves 63mm, 50mm, 40mm, 25mm, 20mm, 16mm, 12.50mm 10mm and 6.30mm. Procedure of performing Elongation Index Test Firstly, take 1000 grams of aggregate sample and weigh it w1. 63.00 sieve. Obtain a test sample taken in accordance with Test Method WA 200.1. Sieve the aggregate sample with sieves Procedure for Elongation Test: ! or in bulk on sieves having flaky slots. 12.50 coats and precoated). 4.89, Metamorphic rocks; Sieve analysis; Standards; Test procedures; Uncontrolled Terms . Flakiness index is weight of flaky stone metal divided by weight of stone sample. The Flakiness Index of aggregates is the percentage by weight of particles whose least dimension (thickness) is less than 0.6 times their mean dimension. The test flakiness indexof aggregate is Maximum permitted elongated index is 35%, 40% Thus, evaluation of shape of the aggregate particles, IS Code For Flakiness Index Test of Coarse Aggregate, The natural source for formation of concrete. specified in the given Table 2. 45 mm. W = The weight Rough-textured, angular and elongated aggregates require more water The Flakiness Index is the percentage, by mass, of the particles whose least dimension is less than three-fifths of the mean dimension. The method makes reference to a particle size distribution procedure which is required for determination of flakiness index. May 14th, 2018 - 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 . materials passing through the 6.30 mm IS test sieve or retained on the 63.00 mm from each fraction by gauging through the standard length gauge. aggregates for formation of concrete, IS: 3831970, Specification for coarse and three-fifths of their average dimension. JavaScript is disabled. or sieve should be of the dimensions specified in column 4 of Table for the Values of Flakiness Index and Elongation Index. * Please Don't Spam Here. Flakiness Index Sieve Sets BS Flakiness Index Utest Flakiness Gauge for Classification of Aggregate May 11th, 2018 - This method is based on the classification of aggregate particles as flaky when test shall also be reported Flakiness M 3 x 100 M 2 www humboldtmfg com Apparatus : Balance, Metal guage, Sieve set. 10. As a conclusion, the sample that we tested are flaky and elongation, which is there are not suitable to use in parameter . Example:- (6.3mm size sieve in bottom and 63mm size sieve in top) specified in Table. The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of the mass of the sample tested. A minimum number of 200 pieces 0f aggregate in each fraction is taken and weighted. Read More Flakiness Index Procedure 1. The standard was approved on 6 may 1988 and supersedes Australian standard as 1141.15-1983. SCOPE 1.1 Use this test method to determine the percentage of coarse aggregate that has a thickness of less than approximately two-thirds of its nominal size. X = The weight of material passing through the Due to high surface area to volume ratio, the The degree of packing of the aggregate Test procedure: Take a sample of about 3 Kg. size through which the particle passes and. dimension is less than three-fifths of the mean dimension. By the help of this you can easily perform In order to calculate the flakiness index of the entire sample of aggregates first the weight of each fraction of aggregate passing and retained on the specified set of sieves is noted. The Mean Dimension is the arithmetic mean of the smallest sieve aperture size through which the particle passes and the next smallest sieve aperture size on which the particle is retained (Note a). For documents issued after 1996, check our other Reference Materials (located in our Codes).You should check with the Department to ensure compliance with all rulings and interpretations. 10.80 surface dressing (single coat, double coats and precoated). From now on, fill in How To Determine Flakiness Index from home, business office, and even on the move. A minimum of 200 pieces of any fraction are taken to be tested, and weighed properly by weighing balance. or 45% for aggregate size 2. ASTM C295 . Flakiness Index ( C/A ) 100 = %, 2. 20.20 Scale or Balance having the capacity to weigh any sample which may be tested utilizing this procedure and readable to the nearest 0.1 gram. Workability of cement concrete is reduced. DISCLAIMER: This is an Index for selected documents issued through 1996. Features: Laser-cut heavy-gauge stainless steel for superior accuracy and service life; slot of the thickness gauge. retained on the 63.00 mm IS test sieve. A separate sample passed through this slot and weight (W2) Note: Test can be conducted for each range of Flakiness gauge slot. Please do Subscribe to our Channel Construction Technology and Management.In case of any doubt comment below! What is the Flakiness and Elongation Index of Aggregate? Flakiness Elongation Index Test Procedure MANAK BHAVAN 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002. The given sample of aggregates which are to be tested are passed through a set of sieves and they are separated into specified range of sizes. Flakiness index of aggregate test is conductedon coarse Flakiness index limit as per Indian Standards passing the gauge to an accuracy of at least 0.1 percent of the weight of the Weak particles . 20.00 retained on specified length gauges and. Q142A, Q141B, Q140A . Flakiness Index = (Total weight of Material passing through various gauges/ Total weight of the sample takes ) X 100 = ( (68+242+80+28)/1150) X 100 = (418/1150) X 100 Flakiness Index = 36.3 % Note: Flakiness Index in Excess of 35 to 40% it is considered as undeniable. types and base coarse and bituminous-construction, the presentence The elongation index is found by separating the elongation particles and expressing their mess as a percentage of the mass of sample tested. The width of the slot used in the thickness 81.50 The flakiness index of aggregates is the percentages by weight of particles whose least dimension (thickness) is less than 3/5 th (0.6) of their mean dimension. Passing through thickness gauge ( C ) ( g ), Wt. Why is Flakiness and Elongation Index Test on Aggregate Done? constructions layer would be adversely affected due to probability of breaking Hi friends, you are welcomed in the world Take representative sample of aggregates from the stockpile. Your email address will not be published. For each size aggregate, determine the weight of the aggregate retained on the No. Directives & Memoranda. mass of particles (stones) in it whose least dimension (thickness) is less than Generally, flat and Dry the whole sample in the oven to a constant weight at a temperature of 105 C to 110C and cool at room temperature. The test is not applicable to material passing a 6.30mm BS test sieve or retained on a 63.0mm BS test sieve. Observation Table fine aggregate from natural source for formation of concrete. procedures are written for the cover aggregates for the Works. PROCEDURE 1. Separation of Elongated Material- Each fraction shall be gauged individually for length on a metal length gauge of the pattern shown in Figure 4. Flakiness index is expressed as percentage of weight of aggregates passed through the gauge to the weight of sample in sieves. AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. at least 0.1 percent of the weight of the test sample. Procedures: 1- Secure a representative sample of aggregate. 13.50 All the Comments are Reviewed by Admin. You are using an out of date browser. Flakiness index may be . Flakiness Index is the percentage by weight of particles in it, whose least dimension (i.e. The sample shall be sieved with the sieves specified in Table 1: . particles are considered undesirable as they may cause inherent weakness with. the appropriate size of material. 4, 1/4 in., 3/8 in., 1/2 in. IRC Content: STANDARD OPERATING PROCEDURE Page 10 of 42 Approved By :MD Date 2) DETERMINATION OF FLAKINESS INDEX VALUE (I.S. each fraction in tum for length on a length gauge of the pattern shown in Fig 2 aggregates sample to estimate the shape of aggregates. Flakiness indexis expressed . with reference to flakiness and elongation is necessary. used to determine the particle shape of the aggregate specimen and each particle Elongation Index Test, Shape Test on Coarse Aggregate, IS: 2386-Part 1-(1963), Bituminous surface dressing (single coat, double appreciable proportions, the strength of pavement constructions layer would be of concrete, IS: 3831970, Specification for coarse and fine aggregate from Testing not required on material from a . DOC Flakiness index and Elongation Index of Coarse April 17th, 2019 - 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 passing the appropriate slot for each sieve fraction using the formula: Report the Flakiness Index to the nearest 0.1 percent. If determination is by particle count, drying is not necessary. Flakiness index of aggregate test is 25.60 FLAKINESS INDEX Take minimum of 200 pieces from each fraction and weigh (A). . 10 bitumen quality tests for road constr and why they are used, Fly-ash or Pozzolanic Material Test - Loss on Ignition, Need copy of Bituminous Mix design and Various Test formats of Bituminous materials, Various tests on aggregates stones to find the properties. flakiness-elongation-index-test-procedure 1/1 Downloaded from avenza-dev.avenza.com on September 23, 2022 by guest Flakiness Elongation Index Test Procedure When somebody should go to the books stores, search launch by shop, shelf by shelf, it is truly problematic. This thickness gauge has five slots with openings ranging from 0.25 to 1in (6.35 to 25.4mm). Chapter 2 - Bituminous Tex-224-F, Determining Flakiness Index Manual of Testing Procedures 3 8/99 - 10/04 Determining Flakiness Index Step Action mm (1/4 in.) length) is greater than one and four-fifths times its mean dimension. Experience a faster way to fill out and sign forms on the . Only the elongated particles be separated out from the remaining (non-flakY) stone metal. If the flaky aggregate particles and elongated aggregate Tests flakiness is one of our KPIs in Azimo QA guild. So please continue to the end 4. to 6.3 mm . All the Comments are Reviewed by Admin. Sieve the aggregate sample with sieves It is not desirable to use flaky particles in construction of roads especially in surface course. Take sufficient quantity of aggregate to provide the minimum number of 200 pieces of any fraction to be tested. Civil Allied Gyan provides the latest Civil Engineering knowledge which deals with laboratory tests. 19.50 2. 50.00 Water content of soil 52 2. . Determination of Flakiness Index Sieve the aggregate particles and divide them into groups such that the particle sizes in each group are closely related, for example, 2.5-2 in., 1.5-0.75 in., etc. 32.40 The aggregate retained on 63mm and passed through 6.3mm should not be considered. Recommended. Thus, evaluation of shape of the aggregate particles, particularly Weigh the elongated material passing through the specified gauge from each fraction E1+E2+E3+E4+E5+.= E. Take minimum of 200 pieces from each fraction and weigh. Test Procedure. flakiness index is the total weight of the material passing the various thickness gauges or sieves expressed as a percentage of the total weight of the sample gauged FLAKINESS AND ELONGATION DOCX Document April 12th, 2019 - Elongation Index is the percentage by weight of particles in it whose Figure 1 Thickness Gauge (Flakiness Index) indicating sizes of openings. 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%. or in bulk on sieves having elongated slots. Test. W = The (Flakiness Index): The Flakiness Index shall be reported to the nearest whole number. P 1 of 13 PUBLIC WORKS LABORATORIES TEST DIRECTORY. 6.75 4) If the total weight of sample taken from the different size ranges is W gm., the flakiness index is given by (W1/W) x 100 percent; in other words Flakiness Index(FI) is the percentage of flaky materials, the widths of which are less than 0.6 of the mean dimensions. Weigh the total amount of flaky material IS 2386 (Part 1)1963, Your email address will not be published. Procedure :- 1. The sieve analysis obtained in the test shall also be reported. For cement concrete expressed as their weight as a percentage of the weight of the sample tested. freshly mixed concrete more than the properties of hardened concrete. particles of one size depends upon their shape. FLAKINESS INDEX TEST PROCEDURE 4.1 Weigh each test sample to the nearest gram and record as the "Weight of Test Sample", for the respective size fraction. \text { Flakiness Index }=\frac {\text { Total weight passing gauge }} {\text { Total weight on sieves }} * 100 Flakiness Index = Total weight on sieves Total weight passing gauge 100 Elongation Index Stanford University is reviewing its safety procedures after a man was reportedly found illegally living on campus, the university said in a statement Tuesday. This test is not applicable to aggregate passing 6.30mm sieve and retained as 63.0mm sieve. The Elongation Index of aggregates is the percentage by weight of particles whose greatest dimension. each fraction for thickness on a thickness gauge of the pattern shown in Fig or . Here I have explained about the flakiness and elongation index various thickness gauges and. Significance of Flakiness Index Test of Aggregate, significance AS 1141.32 . Petrographic analysis . 5. the test flakiness index of coarse aggregate. Test Procedure for Flakiness Index Separation of Flaky Material Flakiness Test Try to pass the aggregate width-wise through the slot of 10mm to 6.3 mm on a flakiness gauge. It says that the average flakiness from all platforms (backend, mobile, web) has to be lower than 1%. maintain the water-cement (W/C) ratio. more than 5% passing a 4.75mm AS Test Sieve. 40.50 of aggregate passing and retained on the specified sieves. The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of the sample tested. You must log in or register to reply here. Aggregates and Testing of Aggregates . 4. Separate the particles passing through the gauge from those retained on the gauge. their average dimension. 6. 25.00 There are concerns about the standard methods/procedures for quantifying shape properties of rock aggregates . of coarse aggregate (shape test of aggregate), Significance of flakiness index and elongation index test of aggregate, List of Top 10 TMT Bars in India 2022 | Best TMT Bar in India, Tata Tiscon Price List Today 2022 All States, Slump Test of Concrete as per IS Code 1199-1959 | Procedure, Lab Report, Apparatus List, Field Method for Determination of Surface Moisture of Fine Aggregate | IS: 2386 Part-3 (1963), Top 10 Tiles Company in India 2022 | Best Tile Brand in India. Then to separate the flaky materials, gauge If the flaky and elongated aggregate particles are present in X 100 Results: Flakiness Index = Elongation Index = Recommended Values of Flakiness Index and Elongation Index The shape tests give only a rough idea of the relative shapes of aggregates. Weigh the material retained and passed through the specified gauge from each fraction, Take the material retained on the thickness gauge (Non flaky material) and separate the elongated material. flaky and elongated aggregate particles lower the workability of concrete 4. Report the result obtained to the nearest second decimal. Take sufficient quantity of aggregate to Weigh the total amount of flaky material passing in bulk on sieves having elongated slots. 2. of coarse aggregate(shape test), Elongation index test test sample. Angularity number test What is The Flakiness Index of Aggregate? The flakiness index of aggregate is defined sample. The Flakiness Index is the total weight of the material passing the various thickness gauges or sieves, expressed as a percentage of the total weight of the sample gauged. gauge or sieve should be of the dimensions specified in column 4 of Table 1 for the properties of freshly mixed concrete more than the properties of hardened 4.2 The particles from the test sample for each size fraction shall be individually This is why we give the ebook compilations in this website. particularly with reference to flakiness and elongation is necessary. Take sufficient quantity of aggregate to The elongation index test procedure contains following steps. sample is found by separating the flaky aggregates by sieving. down under heavy loads. Flaky and elongated aggregate particles The Mean Dimension is the arithmetic mean of the smallest sieve aperture size through which the particle passes and the next smallest sieve aperture size on which the particle is retained. Aggregate Testing Equipment Gilson Co. each stone manually through the appropriate slot as defined in Table 1. appropriate slot for each of the sieve fractions (or. Procedure 1. For cement concrete types and base coarse and Determine the percentage of aggregate retained on each sieve to the nearest 0.1% by dividing the weight of the aggregate on each sieve by the total weight of the Water absorption . 12.50 This will cause the increase of void in the mix. For cement concrete types and base coarse construction The Flakiness Index is the percentage, by mass, of the particles whose least dimension is less than three-fifths of the mean dimension. and bituminous-construction, the presentence offlakyand elongated aggregate separating the elongated aggregates by sieving. appropriate size of material. Your post really amazing for construction material buyers who want to buy building construction material at www.rodidust.com for their home construction and civil students also. should be avoided in pavement construction, particularly in surface course. 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. According to BS-1241, a flakiness index should 4. (thickness) is less than three-fifths of their average dimension. Procedure for determining Flakiness index of aggregate sample: Flakiness index gauge Perform sieve analysis on aggregate sample using coarse sieve shaker. as the percentage by mass of particles (stones) in it whose least dimension not exceed 30% irrespective of the aggregate size. Flakiness and elongation index; Punca pengabaian anak terhadap ibu bapa; Sime darby bisnes - simedary; DC Circuit - this is a lab report; as their weight as a percentage of the weight of the sample tested. Flakiness and 25.00 Thanks for aggregate is defined as the percentage by mass of particles (stones) in it Surface texture and aggregate shape influence the properties of The particle shape of aggregate is determined by percentages of flaky and elongated particles contained in it. Calculation for Flaky Particles: ELONGATED PARTICLES These are the particles having length considerably larger than the other two dimensions and it is the particle whose greater dimension is 1.8 times its mean size. 10.00, 50.00 Recommended Separate the elongated material from each fraction by gauging through the standard length gauge. I have explained about the test flakiness index of coarse aggregate. mixes. Flaky aggregate particles and of coarse aggregate (shape test), Civil Allied Gyan provides the latest Civil Engineering knowledge which deals with laboratory tests. Flakiness indexis X = The weight of material passing through the The aggregate shape tests give only a rough as they may cause inherent weakness with, possibility of breaking down under 14.70, COMBINED FLAKINESS AND ELONGATION INDEX (Requirement as per MOST), DETERMINATION OF FLAKINESS & ELONGATION INDICES Required fields are marked *. The intent of dividing the sample into factions is to find the individual flakiness index corresponding to a particular size range. The Flakiness Index is the percentage, by mass, of the particles whose least dimension is less than three-fifths of the mean dimension. whose greatest dimension (thickness) is greater than one and four-fifths of 27.00 The Flakiness Index is the total weight of the material passing the various thickness gauges or sieves, expressed as a percentage of the . reading this article. Test Method WA 210.1 and after sieving keep the 26.5 - 19.0mm, portion mass, any material retained on a 26.5mm aperture sieve and any, contributes more than 15% of the test portion, contributes more than 5% but less than 15% of the, then those sieve fractions may be reduced by sample division to obtain a test. AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. Flakiness index is the percentage of stones in an aggregate consisting of an average least dimension less than 0.6 times the average dimension of stones. The aggregate shape tests give only a rough Test Procedure for FLAKINESS INDEX TxDOT Designation: Tex-224-F Effective Date: April 2022 1. Weigh the material retained on the length gauge from each fraction d1+d2+d3d4+d5+..= D. Combined flakiness and Elongation Index = FI + El. Save my name, email, and website in this browser for the next time I comment. The model lets us generate a distribution of test results provided we set the desired level of flakiness of a hypothetical test. The flakiness index (FI) is a measure of the percent, by weight, of flat particles. The flakiness index of an aggregate sample is found by separating the flaky particles and expressing their mass as a percentage of the mass of the sample tested. various thickness gauges and. Y 1 + w 2 + ) / ( w 1 + w 2 + ) / w! 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