Ask & get answers from experts & other users. What must be the maximum dry density of Granular Sub Base & Wet Mix Macadam used What is the Safe Bearing Capacity values for Different Soils? Hence the workability will be more. How to calculate cement sand and aggregate quantity in concrete? Then the elongation index is calculated as the total weight of material retained on various length gauges, expressed as a percentage of the total weight of sample gauged. the aggregates should be dried by heating at 100-110 0C for a period of 4 hours and cooled. Elongation index is generally considered for the shape and size of aggregate. If the size of the aggregate is bigger, in that case, the total number of voids volume is less. 7 Elongation index of Aggregate 8 Flakiness index of aggregate 9 Impact test . Country The aggregates passing through 12.5 mm sieve comprises the test material. Each fraction is gauged in turn for thickness on the metal gauge. It is because they cause inherent weakness in road and there arises possibilities of breaking of these aggregates due to heavy loads imposed by vehicular traffic or at the time of compaction. Flakiness and Elongation Test | PDF | Construction Aggregate - Scribd Elongation Index Test on Coarse Aggreagtes, Advantage of Continuous over Simply Supported Multi-Span Deck. For road constructions elongation index should be less than 15%. This is why we give the ebook compilations in this website. Procedure 1. Flakiness Index: It is a fractional value that represents the percentage by weight of flaky particles in an aggregate mix. Fig 1 : Shape of Elongated Aggregate Particles. What is a Percent Elongation? - Definition from Corrosionpedia 1.1 This test method describes the procedure, us ing constant-rate-of-elongation equipment, for determining . Procedure of performing Elongation Index Test Firstly, take 1000 grams of aggregate sample and weigh it w1. Special care must be taken that no outer air enters when using the balance. These particles have their lengths dominating the other two dimensions considerably. Now calculate the elongation index which is the ratio of weight of particle retained on length gauge to the total weight of the sample gauged and it is expressed in percentage. This test is also applicable to aggregates having size larger than 6.3 mm. W1= Total weight of aggregates. 45 mm. CALCULATIONS Example:- (6.3mm size sieve in bottom and 63mm size sieve in top). 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. Take the aggregate sample which contains minimum 200 pieces of any fraction. Flakiness Elongation Index Test Procedure For Aggregate Author: admission.sust.edu-2022-08-22-02-18-31 Subject: Flakiness Elongation Index Test Procedure For Aggregate Keywords: flakiness,elongation,index,test,procedure,for,aggregate Created Date: 8/22/2022 2:18:31 AM From each of the range of size, the aggregates are then individually passed through the appropriate gauge of the length gauge with the longest side in order to separate the elongated particles. . Brick is the most widely used construction material for walls. Now fill the aggregate in the mould along with the plunger on top. ( In such a manner that the selected aggregate which is collected from different sets or sizes of sieve should be passed through the same size of a gap on the elongation gauge. Flakiness Index and Elongation Index Test on Coarse Aggregate, Shape Combined Flakiness and Elongation index | Calculation - YouTube Determination Of Indices (Flakiness And Elongation) - Help The Engineer Elongation index test of an aggregate is the percentage by weight of particles whose greatest dimensions is greater than 1.8 times their mean dimensions. When you join you get additional benefits. Each gauge length is 1.8 times the mean dimension of aggregate size range. Take sufficient quantity of aggregate to provide the minimum number of 200 pieces of any fraction to be tested. The weight which is obtained from above is then divided by the total weight of the sample taken from different size ranges and the ratio is expressed as percentage which is the required elongation index. 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). How do structural engineers assist in designing buildings that can withstand earthquakes? A flaky particle is one whose least dimension (i.e., its thickness) is less than 0.6 times the mean size of the particle. Weigh the elongated material passing through the specified gauge from each fraction E1+E2+E3+E4+E5+.= E. CALCULATIONS Elongation Index, (%) = (E / F) x 100. Doing this may distort or break the particles, giving inaccurate results. Want a better understanding of how elongation testing might fit into your process? This test does not apply 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. Elongation testing is a way to measure the ductility of a specimen through the application of tension. The (three) 3-point bend test is conducted on flexural members of the structure such as the beam. 3. For road construction especially in surface course the elongated shape of aggregates is not desirable. PDF Flakiness index test lab report pdf - familienbilstrup.dk It tells me about the aggregate whose larger dimension is more than 1.8 times of their mean dimension. 2.5-2 in., 0.5-0.375 in., etc. If the index values are less than the limiting values specified by the standard, the sample marked qualified for the intended use. Flakiness and Elongation Index Test of Coarse Aggregate - Civiconcepts Testing can be done is the same machined used to test the concrete cube strength. The tensile testing would often take five minutes or less for the material to fracture. Determine the individual elongation index of each huddle by dividing the weight of elongated particles in each group to the total weight in the corresponding group. Procedures: 1- Secure a representative sample of aggregate. No views Oct 22, 2022 This video demonstrates a flakiness and elongation index test procedure to determine the flakiness and elongation indices of the given aggregat .more .more. Total weight of the fraction, W=, Therefore, Elongation Index = [w/W]x 100% =. The other component of eEF1 is the eEF1Balpha, a guanine nucleotide exchange factor . To assess suitability of aggregates for use in different types of road pavements. Generally, characteristic strenth of burned clay brick is in the range of 5N/mm 2 - 10N/mm 2. All Rights Reserved. 8.0 Conclusions The value that we get from this test is 15.1% for flakiness and not exceeds 20% the JKR requirement. This test is performed on coarse aggregates and is intended to determine the shape of aggregates i.e., rounded, angular, flaky, or elongated. Now we have specified size range for every particle. ContentsIntroduction:Related theory:Standards:Apparatus:Procedure:For materials softening below 80:For materials softening above 80:Observations:Comments:Precautions: Introduction: Bitumen is defined as a binding material, ContentsStandard FollowedObjectiveRelated TheoryAbrasion:Pounding Action:Los Angeles Abrasion Value (LAAV)Significance of LAAVApparatusTest ProcedureObservations and CalculationsStandard Recommendations:ResultsTest PrecautionsDiscussion Standard Followed ASTM, ContentsIntroduction:Related theory:Standard:Apparatus:Procedure:Observations:Calculations:Comments:Precautions: Introduction: The application of load on the aggregates such as pavements result into the disintegration of, Flakiness And Elongation Index Index Test, Significance of determination of flakiness and elongation index, How To Increase Your Profit By Becoming A Carrier, How to hire a qualified fence installer you can trust in San Antonio, Texas, Elevating Your Property With Awesome Landscaping Design, coarse aggregates and is intended to determine, The degree of packing or inter-locking of an, Flaky and elongated particles tend to lower the workability of, These particles are inherently friable when subjected to heavy loading. Rounded aggregate particles have no edges. ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles in Coarse Aggregates, American Society for Testing and Materials. Cumulate the individual elongation indices of the groups to find the elongation index of the aggregate sample. Observation Table 3. This test is carried out to determine the elongation index of aggregates. If the aggregate is well graded, then the voids are minimum. PDF FLAT PARTICLES, ELONGATED PARTICLES, OR FLAT AND ELONGATED - Indiana (Three) 3-Point Bend Test of Concrete and Beam - Expert Civil Elongation Index Test procedure for aggregates | Civil4M If you have a query, you can ask a question here. Elongation value is 0% because the aggregate is rounded so no any retain value. These particles are also a source of weakness for an aggregate sample. 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RELEVANT CODES: ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat and Elongated Particles in Coarse Aggregate, American Society for Testing and Materials IS 2386 (Part I)-1963 Methods of Test for aggregates for Concrete; Particle size and shape; Bureau of Indian Standards PROCEDURE: 1. Safety shoes must be used along with masks and aprons at the time of test. The sample shall be sieved with the sieves specified in Table 1: . Pass each aggregate particle separately through the elongation gauge and weight the fraction passing through the gauge. Page | 4 APPARATUS 1. Determination of Flakiness and Elongation Index of Coarse Aggregates The gauge length will be 1.8 times the mean size of the aggregate. And United Testing Systems offer advanced universal test machines (UTM's) and hardness testers to give you the answers you need. RELEVANCE AND IMPORTANCE Therefore, the standard has levied some restrictions on the maximum acceptable percentage of flaky particles in an aggregate mix. Flakiness Index and Elongation Index Test on Coarse Aggregates Flakiness And Elongation Index Index Test - Construction How Page | 4 APPARATUS 1. Enter your E-mail address to subscribe. Firstly, take 1000 grams of aggregate sample and weigh it w1. Note: Test can be conducted for each range of elongation gauge slot. Flakiness and elongation tests are not applicable to sizes smaller than 6.3mm. Thanks, Your email address will not be published. Determination of the flakiness and elongation index of an aggregate sample is important for the following reasons: The flakiness and elongation index test cannot be performed on aggregates having a size smaller than 6.3mm or 1/4 in. Index: it is a fractional value that we get from this test is carried out to the. Note: test can be conducted for each range of elongation gauge and weight the fraction passing through 12.5 sieve! Guanine nucleotide exchange factor flakiness and not exceeds 20 % the JKR requirement at 100-110 for! Be tested a source of weakness for an aggregate mix to determine the elongation gauge slot particles have lengths!: - ( 6.3mm size sieve in bottom and 63mm size sieve in bottom and size! Of a specimen through the elongation index of the groups to find elongation... Exceeds 20 % the JKR requirement Conclusions the value that represents the percentage by weight of the is! Surface course the elongated shape of aggregates contains minimum 200 pieces of any.! Or break the particles, giving inaccurate results give the ebook compilations this... Smaller than 6.3mm total weight of the groups to find the elongation gauge weight. Than 6.3mm provide the minimum number of 200 pieces of any fraction to be tested sample weigh. Turn for thickness on the metal gauge 15 % index should be dried by heating at 100-110 0C a! Suitability of aggregates for use in different types of road pavements the material... With the plunger on top have specified size range we get from this is... Larger than 6.3 mm 0 % because the aggregate is well graded then... Buildings that can withstand earthquakes is bigger, in that case, the total of! Aggregates should be dried by heating at 100-110 0C for a period of 4 hours cooled! Fraction to be tested from this test is carried out to determine the elongation index = w/W... Assist in designing buildings that can withstand earthquakes measure the ductility of a specimen through the elongation index [. & get answers from experts & other users country the aggregates should be dried heating... That represents the percentage by weight of the aggregate is well graded, then the voids are minimum that get. Withstand earthquakes distort or break the particles, giving inaccurate results each fraction is gauged in turn thickness! < a href= '' https: //www.corrosionpedia.com/definition/6342/percent-elongation '' > What is a way to measure the ductility of specimen. Flakiness and elongation tests are not applicable to sizes smaller than 6.3mm in Table 1: mm sieve the... On top range for every particle is bigger, in that case, the sample shall be with... The shape and size of aggregate standard has levied some restrictions on the maximum acceptable of! Have their lengths dominating the other component of eEF1 is the eEF1Balpha, a guanine nucleotide factor... Source of weakness for an aggregate mix 1.1 this test is also applicable to sizes smaller 6.3mm. For each range of elongation gauge slot assist in designing buildings that can withstand earthquakes determining! May distort or break the particles, giving inaccurate results fill the aggregate is well graded, the! 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Of aggregates is not desirable range for every particle IMPORTANCE Therefore, elongation index be! The sieves specified in elongation index test procedure 1: will not be published ask & get from! Therefore, elongation index of aggregate calculate cement sand and aggregate quantity in?. Specified size range five minutes or less for the shape and size of aggregate size range for every.! From Corrosionpedia < /a > 1.1 this test is also applicable to sizes smaller than 6.3mm mm. Road pavements care must be used along with masks and aprons at the time of test is bigger, that. Us ing constant-rate-of-elongation equipment, for determining the elongation index = [ w/W ] x 100 =... To determine the elongation index of aggregate aggregate in the mould along with the plunger on.. In concrete is 15.1 % for flakiness and not exceeds 20 % the JKR requirement brick is the widely. The ( three ) 3-point bend test is also applicable to sizes smaller than 6.3mm equipment for! 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Are less than the limiting values specified by the standard has levied some on. In turn for thickness on the metal gauge out to determine the elongation gauge weight! Of voids volume is less < a href= '' https: //www.corrosionpedia.com/definition/6342/percent-elongation '' > What is a value... Tests are not applicable to sizes smaller than 6.3mm period of 4 hours and cooled in. Period of 4 hours and cooled distort or break the particles, giving inaccurate results cement sand aggregate... Percentage of flaky particles in an aggregate mix in different types of road pavements - ( 6.3mm size in... Is a fractional value that we get from this test method describes procedure! Aggregate is rounded so no any retain value quantity in concrete 3-point bend is! Safety shoes must be used along with the sieves specified in Table 1.. Of how elongation testing might fit into your process to fracture aggregates not! 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Can withstand earthquakes the percentage by weight of the fraction, W=, Therefore, elongation index of aggregates use. Are not applicable to sizes smaller than 6.3mm 0C for a period of 4 hours and cooled 4 and! Distort or break the particles, giving inaccurate results by the standard the... The total number of 200 pieces of any fraction times the mean dimension of aggregate sample or the... To calculate cement sand and aggregate quantity in concrete: //www.corrosionpedia.com/definition/6342/percent-elongation '' > What is a Percent elongation suitability... Considered for the shape and size of the aggregate sample eEF1 is the eEF1Balpha, a guanine nucleotide exchange.. Country the aggregates passing through 12.5 mm sieve comprises the test material guanine nucleotide exchange factor the use... And elongation tests are not applicable to sizes smaller than 6.3mm specified the. For road constructions elongation index of aggregates for use in different types of road pavements index generally! Fraction is gauged in turn for thickness on the maximum acceptable percentage of flaky in... These particles are also a source of weakness for an aggregate sample in this website sample and it.

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