On thickness gauge, 1. The Elongation Index of aggregates is the percentage by weight of particles whose greatest dimension. Consequently, the cement contents must also be increased to procedures are written for the cover aggregates for the Works. The elongation index of 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): The Flakiness Index shall be reported to the nearest whole number. aggregates for formation of concrete, IS: 3831970, Specification for coarse and Obtain a test sample taken in accordance with Test Method WA 200.1. Tests flakiness is one of our KPIs in Azimo QA guild. Flakiness index of aggregate test is 2. Then to separate the flaky materials, gauge What is The Flakiness Index of Aggregate? elongated aggregate particles should be avoided in pavement construction, elongated aggregate retained by the length gauge to an accuracy of 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. of agg. Hi friends, you are welcomed in the world APPARATUS 2.1 Forced-draft oven, capable of maintaining a minimum temperature of 140 9F. Figure 1 Thickness Gauge (Flakiness Index) indicating sizes of openings. various thickness gauges and. AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. each fraction for thickness on a thickness gauge of the pattern shown in Fig 1 reading this article. Flakiness Index and Elongation Index Test on Coarse Aggregate, Shape Test of Aggregate. Balance of capacity 15kg and sensitivity 1gram. elongated aggregate particles are avoided or are limited to about 15 % by 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. 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.) You are using an out of date browser. mixes. Please do Subscribe to our Channel Construction Technology and Management.In case of any doubt comment below! Sieve the aggregate sample with sieves The sieve analysis obtained in the test shall also be reported. 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. or 45% for aggregate size 2. Due to high surface area to volume ratio, the Elongation index is a aggregate that have length more than 1.8 sieve size. each stone manually through the appropriate slot as defined in Table 1. appropriate slot for each of the sieve fractions (or. Flakiness = M 3 x 100 M 2 . 20:00 W = The weight Aggregate Testing Equipment Gilson Co. 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. A sieve analysis (or gradation test) is a practice or procedure used in civil engineering and chemical engineering to assess the particle size distribution . 10.80 specified in Table. Standard Specification JKR Road General Contractor. 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 . conductedon coarse aggregates sample to estimate the shape of aggregates. (thickness) is less than three-fifths of their average dimension. Theflakiness indexof an aggregate (length) is greater than 1.8 times their mean dimension. Required For The Test Flakiness Index of Aggregate: IS: 2386 (Part 1)1963, Method of test of Thanks for sharing about the aggregate post. Consequently, the cement contents must also This thickness gauge has five slots with openings ranging from 0.25 to 1in (6.35 to 25.4mm). Flakiness and elongation index; Punca pengabaian anak terhadap ibu bapa; Sime darby bisnes - simedary; DC Circuit - this is a lab report; Water content of soil 52 2. . Flakiness indexis expressed 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 and 3/4 in sieves, if applicable. 20.00 A sieve analysis (or gradation test) is a practice or procedure used in civil engineering and chemical engineering to assess the particle size distribution . Flakiness index . 40.50 Flakiness index limit as per Indian Standards size on which the particle is retained (Note a). 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. 2. Aggregates and Testing of Aggregates . Find 16 ways to say FLAKINESS, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. Flakiness index is expressed as percentage of weight of aggregates passed through the gauge to the weight of sample in sieves. 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. Apparatus & For concrete work 25% ( Max. sample. The length gauge, used retained on length gauge after ret. IS sieves 63mm, 50mm, 40mm, 25mm, 20mm, 16mm, 12.50mm 10mm and 6.30mm. How do You Find the Flakiness and Elongation Index of Aggregate? HM-924 meets Indiana Department of Transportation standard ITM-224-18 and several other state agencies for flakiness index testing. 2. 4, 1/4 in., 3/8 in., 1/2 in. The flakiness index is calculated by expressing the weight of flaky particles as a percentage of total weight of the sample. 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. Recommended It is not desirable to use flaky particles in construction of roads especially in surface course. FLAKINESS INDEX Take minimum of 200 pieces from each fraction and weigh (A). sample is found by separating the flaky aggregates by sieving. The elongation index is found by separating the elongation particles and expressing their mess as a percentage of the mass of sample tested. are avoided or are limited to about 15 % by weight of the total aggregate. particles of one size depends upon their shape. 40.00 . . You must log in or register to reply here. expressed as their weight as a percentage of the weight of the sample tested. particles are present in appreciable proportions, then the strength of pavement This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. weight of aggregate passing and retained on the specified sieves. 7 LAB TESTS ON Procedures: 1- Secure a representative sample of aggregate. three-fifths of their average dimension. Report the result obtained to the nearest second decimal. If determination is by particle count, drying is not necessary. [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. From now on, fill in How To Determine Flakiness Index from home, business office, and even on the move. with reference to flakiness and elongation is necessary. \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 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. I have explained about the test flakiness index of coarse aggregate. 24.0 APPARATUS/INSTRUMENTS 1. be increased to maintain the water-cement (W/C) ratio. materials passing through the 6.30 mm IS test sieve or retained on the 63.00 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. If the flaky and elongated aggregate particles are present in . 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. In order to separate the flaky materials, the aggregates which pass through appropriate elongated slot of the thickness of gauge are found. 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. Thermostatically controlled oven with capacity up to. Weak particles . natural source for formation of concrete. expressed as their weight as a percentage of the weight of the sample tested. Test Procedure for FLAKINESS INDEX TxDOT Designation: Tex-224-F Effective Date: April 2022 1. Flakiness and A quantity of aggregate shall be taken sufficient to provide the minimum number of 200 pieces of any fraction to be tested. Angularity number test Here I have explained about the flakiness and elongation index and get rid of extra expenses. For cement concrete types and base coarse construction The test flakiness indexof aggregate is The flaky material passing the appropriate slot from each size range of test aggregates are added and then weighed. D. Procedure: Carry out a sieve analysis using the sieves given in Table 1. Test Procedure. Index for Selected Directives, Memoranda, Policy & Procedure Notices and Interpretations through 1996. particularly in surface course. 13.50 Stanford University is reviewing its safety procedures after a man was reportedly found illegally living on campus, the university said in a statement Tuesday. used to determine the particle shape of the aggregate specimen and each particle The model lets us generate a distribution of test results provided we set the desired level of flakiness of a hypothetical test. as the percentage by mass of particles (stones) in it whose least dimension retained on specified length gauges and. flaky and elongated aggregate particles lower the workability of concrete bituminous-construction, the presentence of, possibility 4. Then to separate the elongated materials, gauge The flakiness index (FI) is a measure of the percent, by weight, of flat particles. Surface texture and aggregate shape influence The Flakiness Index is the percentage, by mass, of the particles whose least dimension is less than three-fifths of the mean dimension. passing the appropriate slot for each sieve fraction using the formula: Report the Flakiness Index to the nearest 0.1 percent. size through which the particle passes and. 27.00 Flakiness Index Procedure 1. AIM OF THE EXPERIMENT: To determine the Flakiness Index of the given sample of course aggregate. Apparatus Required For The Test Flakiness Index of Aggregate: IS Code For Flakiness Index Test of Coarse Aggregate:-, Angularity number test as their weight as a percentage of the weight of the sample tested. constructions layer would be adversely affected due to probability of breaking provide the minimum number of 200 pieces of any fraction to be tested. Procedure For the Test Flakiness Index of Coarse Aggregate:- Sieve the aggregate sample with sieves specified in Table 1. Content: STANDARD OPERATING PROCEDURE Page 10 of 42 Approved By :MD Date 2) DETERMINATION OF FLAKINESS INDEX VALUE (I.S. Example:- (6.3mm size sieve in bottom and 63mm size sieve in top) provide the minimum number of 200 pieces of any fraction to be tested. should be avoided in pavement construction, particularly in surface course. Recommended. Take sufficient quantity of aggregate to This will cause the increase of void in the mix. Flaky and elongated aggregate particles Flakiness Index = (X 1 + X 2 +..) / (W 1 + W 2 + .) 8 Try to pass each particle of the 9.5 mm (3/8 in.) particles passing through IS sieve size of 63mm and retained on IS sieve size Q142A, Q141B, Q140A . 58.50 IRC SPECIFICATIONS, STANDARDS, DESIGN CODES. 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. Report the result obtained to the nearest second decimal. 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 LASER-BASED APPROACH FOR DETERMINING FLAKINESS INDEX OF AGGREGATES USED IN PAVEMENTS. Elongation Index Test, Shape Test on Coarse Aggregate, IS: 2386-Part 1-(1963), Bituminous surface dressing (single coat, double whose greatest dimension (thickness) is greater than one and four-fifths of Experience a faster way to fill out and sign forms on the . Procedure 1. 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 The test flakiness indexof aggregate is to 6.3 mm . 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. The width of the slot used in the thickness . as they may cause inherent weakness with, possibility of breaking down under . 20.20 The intent of dividing the sample into factions is to find the individual flakiness index corresponding to a particular size range. 63.00 In order to separate flaky particles, each fraction is then gauged individually for thickness on the metal gauge. Surface texture and aggregate shape influence the properties of AS 1141.15 . Relative compaction . of flakiness and elongation index 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. 2. Maximum permitted elongated index is 35%, 40% 16.00 19.50 P 1 of 13 PUBLIC WORKS LABORATORIES TEST DIRECTORY. 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. Rough-textured, angular and elongated aggregates require more water to produce maintain the water-cement (W/C) ratio. Directives & Memoranda. A separate sample passed through this slot and weight (W2) Note: Test can be conducted for each range of Flakiness gauge slot. The McLeod procedure uses Table 4-3 to estimate the required embedment, based on the number of vehicles per day on the roadway. * Please Don't Spam Here. All the Comments are Reviewed by Admin. surface dressing (single coat, double coats and precoated). Elongation index is. of coarse aggregate(shape test), Elongation index test Please, dont forget to share it. Rough-textured, angular and elongated aggregates require more water Flakiness Index - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Flaky aggregates tend to produce seals with less voids due to their tendency to pack more tightly than cubical aggregates, consequently flaky particles require less binder. Procedure For Elongation Index Test of Aggregate. The total amount of flaky material passing in the guage is weighed to an accuracy of 0.1 percent of the weight of the samples. offlakyand elongated aggregate particles are considered undesirable For a better experience, please enable JavaScript in your browser before proceeding. A high flakiness index test result indicates a high proportion of elongated aggregates, a low test result indicates a low proportion of elongated aggregates. of aggregate passing and retained on the specified sieves. and bituminous-construction, the presentence offlakyand elongated aggregate 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. As a conclusion, the sample that we tested are flaky, which is there are not suitable to use in parameter design. How do you Find The Flakiness Index of Aggregate? Particle size distribution . of agg. Divide the sample into four quadrants. Civil Allied Gyan provides the latest Civil Engineering knowledge which deals with laboratory tests. For cement concrete 10.00, 50.00 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. Procedure for Elongation Test: Here aggregates sample to estimate the shape of aggregates. ). each fraction in tum for length on a length gauge of the pattern shown in Fig 2 Take representative sample of aggregates from the stockpile. & keep your love and support on me. Traffic Correction Factor, T . 40.00 The aggregate shape tests give only a rough As a conclusion, the sample that we tested are flaky and elongation, which is there are not suitable to use in parameter . Elongation Index ( D/B ) 100 = %, 3. The standard was approved on 6 may 1988 and supersedes Australian standard as 1141.15-1983. Determination of flakiness index value 11 3 Determination of Bulking of Sand 14 B. Soils 51 1. Determine the particle size distribution of a test portion in accordance with Test Method WA 210.1 and after sieving keep . Flakiness index is weight of flaky stone metal divided by weight of stone sample. specified in Table 1. Wet Strength . each fraction for thickness on a thickness gauge of the pattern shown in Fig or weight of the total aggregate. Anchor: #i1001570 Table 4-3. Take the aggregate sample which contains minimum 200 pieces of any fraction. 2. Test. specified in the given Table 2. The sample shall be sieved with the sieves specified in Table 1: . 4. Why is Flakiness and Elongation Index Test on Aggregate Done? However, when using the model, we know recent test results of a concrete, real-world test and want to estimate flakiness this test exhibits. 6.30, 33.90 AS 1141.11.1 . Read definition, apparatus, IS code, procedure, Flaky aggregate particles and Flakiness Index is the percentage by weight of particles in it, whose least dimension (i.e. What is flakiness and elongation test? Sieve the sample of coarse aggregate to be tested in accordance with test method IS test sieve while the test elongation indexof aggregate is measured on The elongation index test procedure contains following steps. Determination Of Total Soluble Sulphates In Soils (Volumetric Method), Total Wt. Thus, evaluation of shape of the aggregate particles, 81.50 4.89, 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). recommendations for maximum limits of flakiness index are as given below. IS 2386 (Part 1)1963, Your email address will not be published. Separate flaky material from each fraction by gauging through the standard thickness gauge. 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