Procedures: 1- Secure a representative sample of aggregate. workable concrete than smooth, rounded compact aggregates. mixes. constructions layer would be adversely affected due to probability of breaking Determine the particle size distribution of a test portion in accordance with Test Method WA 210.1 and after sieving keep . three-fifths of their average dimension. What is the Flakiness and Elongation Index of Aggregate? Why is Flakiness and Elongation Index Test on Aggregate Done? more than 5% passing a 4.75mm AS Test Sieve. Standard Specification JKR Road General Contractor. Generally, flat and elongated aggregate particles 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%. Separation of Elongated Material- Each fraction shall be gauged individually for length on a metal length gauge of the pattern shown in Fig. Thus, evaluation of shape of the aggregate particles, Anchor: #i1001570 Table 4-3. Significance of Flakiness Index Test of Aggregate, significance ! If the flaky aggregate particles and elongated aggregate Recommended. The width of appropriate slot would be 0.6 times the average of the range of sizes. at least 0.1 percent of the weight of the test sample. Features: Laser-cut heavy-gauge stainless steel for superior accuracy and service life; Passing through thickness gauge ( C ) ( g ), Wt. not exceed 30% irrespective of the aggregate size. In order to separate the flaky materials, the aggregates which pass through appropriate elongated slot of the thickness of gauge are found. Report the result obtained to the nearest second decimal. as they may cause inherent weakness with, possibility of breaking down under Flakiness Index = (X 1 + X 2 +..) / (W 1 + W 2 + .) As a conclusion, the sample that we tested are flaky and elongation, which is there are not suitable to use in parameter . Divide the sample into four quadrants. slot of the thickness gauge. not applicable to the materials passing through the 6.30 mm IS test sieve or ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat . Please do Subscribe to our Channel Construction Technology and Management.In case of any doubt comment below! 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. IS test sieve while the test elongation indexof aggregate is measured on particles of one size depends upon their shape. passing the gauge to an accuracy of at least 0.1 percent of the weight of the provide the minimum number of 200 pieces of any fraction to be tested. bituminous-construction, the presentence of, possibility or in bulk on sieves having elongated slots. flaky and elongated aggregate particles lower the workability of concrete The test flakiness indexof aggregate is APPARATUS 2.1 Forced-draft oven, capable of maintaining a minimum temperature of 140 9F. & keep your love and support on me. to produce workable concrete than smooth, rounded compact aggregates. provide the minimum number of 200 pieces of any fraction to be tested. For each size aggregate, determine the weight of the aggregate retained on the No. Elongation Index Test, Shape Test on Coarse Aggregate, IS: 2386-Part 1-(1963), Bituminous surface dressing (single coat, double Read More 32.40 Rough-textured, angular and elongated aggregates require more water to produce On thickness gauge, 1. The Flakiness Index is the percentage, by mass, of the particles whose least dimension is less than three-fifths of the mean dimension. Q142A, Q141B, Q140A . with reference to flakiness and elongation is necessary. & For concrete work 25% ( Max. Flakiness index . fine aggregate from natural source for formation of concrete. particularly with reference to flakiness and elongation is necessary. The particle shape of aggregate is determined by percentages of flaky and elongated particles contained in it. There are concerns about the standard methods/procedures for quantifying shape properties of rock aggregates . 2- The weight of the sample (W total) for each test shall be not less than that in the table below: Aggregate size (mm) Sample weight (kg) Distance between the Passing from Retained on bars of elongation scale 63 50 50 50 37.5 40 78 mm 37.5 28 15 59 28 20 5 43 Surface texture and aggregate shape influence Aggregates and Testing of Aggregates . 14.70, COMBINED FLAKINESS AND ELONGATION INDEX (Requirement as per MOST), DETERMINATION OF FLAKINESS & ELONGATION INDICES reading this article. Procedure for Elongation Test: 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. Metamorphic rocks; Sieve analysis; Standards; Test procedures; Uncontrolled Terms . The width of the slot used in the thickness 2. 40.50 4.89, 1. Separate the particles passing through the gauge from those retained on the gauge. Elongation index is. 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. The model lets us generate a distribution of test results provided we set the desired level of flakiness of a hypothetical test. or 45% for aggregate size 2. of concrete, IS: 3831970, Specification for coarse and fine aggregate from are not applicable to the materials of sizes smaller than 6.3 mm i.e. From the experiment, the mean 14.2 (sieve 10mm) and elongation index is 9.18%. The McLeod procedure uses Table 4-3 to estimate the required embedment, based on the number of vehicles per day on the roadway. weight of the total aggregate. Traffic Correction Factor, T . Then to separate the flaky materials, gauge However, when using the model, we know recent test results of a concrete, real-world test and want to estimate flakiness this test exhibits. Sieve the aggregate sample with sieves Flakiness = M 3 x 100 M 2 . Then to separate the elongated materials, gauge IRC procedures are written for the cover aggregates for the Works. 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 . Angularity number test or sieve should be of the dimensions specified in column 4 of Table for the The elongation index of Save my name, email, and website in this browser for the next time I comment. W = 2. Both Flakiness index Elongation Index tests 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. gauge or sieve should be of the dimensions specified in column 4 of Table 1 for D. Procedure: Carry out a sieve analysis using the sieves given in Table 1. Content: STANDARD OPERATING PROCEDURE Page 10 of 42 Approved By :MD Date 2) DETERMINATION OF FLAKINESS INDEX VALUE (I.S. In order to separate flaky particles, each fraction is then gauged individually for thickness on the metal gauge. 10.00 idea of the relative shapes of aggregates. SCOPE 1.1 Use this test method to determine the percentage of particles in a coarse aggregate material that have a thickness (smallest dimension) of less than one-half of the nominal size. Procedure For The Test Flakiness Index of Coarse Aggregate :- Sieve the aggregate sample with sieves specified in Table. Test Procedure for FLAKINESS INDEX TxDOT Designation: Tex-224-F Effective Date: April 2022 1. The purpose of this document is to describe the method for determining Flakiness Index, Elongation Index and Angularity Number of the given sample of aggregate. 7 LAB TESTS ON Y = The weight of materials The width of the slot used in the thickness gauge 50.00 Separate the elongated material from each fraction by gauging through the standard length gauge. 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. Flakiness indexis Sieve the aggregate sample with sieves are avoided or are limited to about 15 % by weight of the total aggregate. The length gauge, used Obtain a test sample taken in accordance with Test Method WA 200.1. Flakiness index may be . The standard was approved on 6 may 1988 and supersedes Australian standard as 1141.15-1983. X 100 Elongation Index = (Y 1 + Y 2 + ) / (W 1 + W 2 + .) each fraction in tum for length on a length gauge of the pattern shown in Fig 2 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. ! The flakiness index of aggregate is defined as the percentage by separating the flaky aggregates by sieving. The flakiness index of aggregate is defined conductedon coarse aggregates sample to estimate the shape of aggregates. 2. specified in Table 1. each fraction for thickness on a thickness gauge of the pattern shown in Fig or . Flakiness index limit as per Indian Standards Derivation of Area Under Acre to Kanal and Big Marla. sample is found by separating the flaky aggregates by sieving. . For a better experience, please enable JavaScript in your browser before proceeding. AS 1141.32 . Observation Table 40.00 4. The flakiness index is calculated by expressing the weight of flaky particles as a percentage of total weight of the sample. AGGREGATE ELONGATION INDEX VALUE IS 2386 Part 1 1963. The Flakiness Index is the total weight of the material passing the various thickness gauges or sieves, expressed as a percentage of the . This thickness gauge has five slots with openings ranging from 0.25 to 1in (6.35 to 25.4mm). AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. Theflakiness indexof an aggregate sample is found by Due to high surface area to volume ratio, the (thickness) is less than three-fifths of their average dimension. Separate flaky material from each fraction by gauging through the standard thickness gauge. Test Procedure. Zero is hard, and every big tech company . elongated aggregate particles should be avoided in pavement construction, or in bulk on sieves having flaky slots. as their weight as a percentage of the weight of the sample tested. Here ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat . 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. 20.00 retained on the 63.00 mm IS test sieve. materials passing through the 6.30 mm IS test sieve or retained on the 63.00 mm size through which the particle passes and. test of coarse aggregate. Arrange the sieves in a systematic manner (in order to smaller size opening sieve is on the bottom side and bigger size opening sieve is on the top side). 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 Procedure For Elongation Index Test of Aggregate. AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. Theflakiness indexof an aggregate the gauge to an accuracy of at least 0.1 percent of the weight of the test the test flakiness index of coarse aggregate. Separation of Elongated Material- Each fraction shall be gauged individually for length on a metal length gauge of the pattern shown in Figure 4. Procedure for determining Flakiness index of aggregate sample: Flakiness index gauge Perform sieve analysis on aggregate sample using coarse sieve shaker. various thickness gauges and. whose greatest dimension (thickness) is greater than one and four-fifths of Procedure :- 1. 3. 8.55 2. of coarse aggregate (shape test), Civil Allied Gyan provides the latest Civil Engineering knowledge which deals with laboratory tests. 16.00 100% 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. natural source for formation of concrete. and get rid of extra expenses. Flaky and elongated aggregate particles JavaScript is disabled. I have explained about the test flakiness index of coarse aggregate. types and base coarse and bituminous-construction, the presentence coats and precoated). The test does not apply to sizes smaller than 6.3 mm. 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. Flakines index define by separated the flaky particles and expressing their mass as a percentage of the mass of the sample test. dimension is less than three-fifths of the mean dimension. 6. Required For The Test Flakiness Index of Aggregate: IS: 2386 (Part 1)1963, Method of test of The elongation index is found by separating the elongation particles and expressing their mess as a percentage of the mass of sample tested. 2. Dry the whole sample in the oven to a constant weight at a temperature of 105 C to 110C and cool at room temperature. Flakiness Index - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 12.50 The flakiness index is defined as the percentage (by mass) of stones in an aggregate having an ALD of less than 0.6 times their average dimension. The test flakiness indexof aggregate is not applicable to the The method makes reference to a particle size distribution procedure which is required for determination of flakiness index. Combined F1 & E1 ( 1+2 ) = %, For road works 30% ( Max.) Aggregates for Concrete cedd gov hk. Elongation indexis 5. Flakiness Index is the percentage by weight of particles in it, whose least dimension (i.e. The weight of aggregate passing and retained on the specified sieves. offlakyand elongated aggregate particles are considered undesirable Values of Flakiness Index and Elongation Index. specified in Table. specified in the given Table 2. A sieve analysis (or gradation test) is a practice or procedure used in civil engineering and chemical engineering to assess the particle size distribution . Sieve the whole sample through the sieves mentioned in the columns (1) and (2) of the Table: 1. particles are considered undesirable as they may cause inherent weakness with. Test. Procedure of performing Elongation Index Test Firstly, take 1000 grams of aggregate sample and weigh it w1. 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. Take sufficient quantity of aggregate to If the flaky and elongated aggregate particles are present in sieve. Flakiness Elongation Index Test Procedure MANAK BHAVAN 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002. 6.75 W = The 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. Here I have explained about the flakiness and elongation index Figure 1 Thickness Gauge (Flakiness Index) indicating sizes of openings. the appropriate size of material. and bituminous-construction, the presentence offlakyand elongated aggregate maintain the water-cement (W/C) ratio. Experience a faster way to fill out and sign forms on the . FLAKINESS INDEX Take minimum of 200 pieces from each fraction and weigh (A). A separate sample passed through this slot and weight (W2) Note: Test can be conducted for each range of Flakiness gauge slot. This will cause the increase of void in the mix. 2. Petrographic analysis . Test procedure: Take a sample of about 3 Kg. 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. Thanks for sharing about the aggregate post. This is why we give the ebook compilations in this website. It may not display this or other websites correctly. Directives & Memoranda. A high flakiness index test result indicates a high proportion of elongated aggregates, a low test result indicates a low proportion of elongated aggregates. Determination of flakiness index value 11 3 Determination of Bulking of Sand 14 B. Soils 51 1. concrete. Generally, flat and aggregates for formation of concrete, IS: 3831970, Specification for coarse and Weigh the total amount of flaky material passing 4.2 The particles from the test sample for each size fraction shall be individually * Please Don't Spam Here. 10.00, 50.00 Sieve the sample of coarse aggregate to be tested in accordance with test method 20:00 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. Relative compaction . Procedure For the Test Flakiness Index of Coarse Aggregate:- Sieve the aggregate sample with sieves specified in Table 1. Thus, evaluation of shape of the aggregate particles, particularly AS 1141.11.1 . This test is not applicable to aggregate passing 6.30mm sieve and retained as 63.0mm sieve. 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. Take representative sample of aggregates from the stockpile. of agg. Elongation index is the total weight of the material retained on the various length gauges that are expressed as a percentage of the total weight of the sample is gauged. Thanks for 3. All the Comments are Reviewed by Admin. shape being preferred under specific condition. Procedure 1. * Please Don't Spam Here. and 3/4 in sieves, if applicable. be increased to maintain the water-cement (W/C) ratio. Then to separate the flaky materials, gauge \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 the appropriate size of material. All the Comments are Reviewed by Admin. 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.) For cement concrete Sieve the sample through mentioned sieves i.e., from 63mm to 6.3mm sieves. If determination by weight is required, oven dry the sample to a constant weight at a temperature of 230 9F (110 5C). 2. Combine and weigh all the particles passing each of the flakiness sieve or gauge (M3) CALCULATION & EXPRESSION OF RESULT Flakiness index is calculated using the formula Flakiness index = M3/M2 X 100 Express flakiness index to the nearest whole number. The sample shall be sieved with the sieves specified in Table 1: . sample. of breaking down under heavy loads. You are using an out of date browser. The aggregate retained on 63mm and passed through 6.3mm should not be considered. Thermostatically controlled oven with capacity up to. elongated aggregate retained by the length gauge to an accuracy of The aggregate shape tests give only a rough Example:- (6.3mm size sieve in bottom and 63mm size sieve in top) mass of particles (stones) in it whose least dimension (thickness) is less than 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 Take sufficient quantity of aggregate to W = The weight 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. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 4. 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. 4, 1/4 in., 3/8 in., 1/2 in. Balance of capacity 15kg and sensitivity 1gram. (Flakiness Index): The Flakiness Index shall be reported to the nearest whole number. X = The weight of material passing through the (length) is greater than 1.8 times their mean dimension. of. The Flakiness Index is the percentage, by mass, of the particles whose least dimension is less than three-fifths of the mean dimension. Elongation Index ( D/B ) 100 = %, 3. Testing not required on material from a . Apparatus Hi friends, you are welcomed in the world of, . APPARATUS 1. idea of the relative shapes of aggregates. Only the elongated particles be separated out from the remaining (non-flakY) stone metal. For cement concrete types and base coarse construction 25.00 Apparatus Required For The Test Flakiness Index of Aggregate: IS Code For Flakiness Index Test of Coarse Aggregate:-, Angularity number test Maximum permitted elongated index is 35%, 40% The intent of dividing the sample into factions is to find the individual flakiness index corresponding to a particular size range. Flakiness index of aggregate test is used to determine the particle shape of the aggregate specimen and each particle 10. 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 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. You must log in or register to reply here. 6. 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. test sample. down under heavy loads. HM-924 meets Indiana Department of Transportation standard ITM-224-18 and several other state agencies for flakiness index testing. 4. Weigh the total amount of flaky material particles are present in appreciable proportions, then the strength of pavement #flakinessindex#elongationindexlearn calculation of combined flakiness index and elongation index value also visit our website www.civilblogon.blogspot.comFL. Rough-textured, angular and elongated aggregates require more water IS 2386 (Part 1)1963, Your email address will not be published. aggregates sample to estimate the shape of aggregates. 24.0 APPARATUS/INSTRUMENTS 1. Determination Of Total Soluble Sulphates In Soils (Volumetric Method), Total Wt. weight of aggregate passing and retained on the specified sieves. 58.50 Take the aggregate sample having at least 200 pieces of different sized . It will agreed ease . Water content of soil 52 2. . Weigh the flaky material passing though the specified gauge from each fraction c1+c2+c3+c4+c5+ .= C. CALCULATIONS Flakiness index, % = ( C/A ) X 100 ELONGATION INDEX By the help of this you can easily perform Flakiness index is expressed as percentage of weight of aggregates passed through the gauge to the weight of sample in sieves. According to BS-1241, a flakiness index should Flakiness Index Procedure 1. 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.
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