03DKA16F2018 Fig. In bituminous mixtures, flaky aggregates make for a harsh mix and may also crack and break up . Take sufficient quantity of aggregate to provide the minimum number of 200 pieces of any fraction to be tested. DCC 3122 Length gauge sketch 2. The elongation index is found by separating the elongation particles and expressing their mess as a percentage of the mass of sample tested. 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Click Here to go to Flakiness Test Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than one and four-fifth times their mean . This is known as the specimens plastic deformation. CIK FAIZAH BINTI HJ. OBJECTIVE : The objective of the test is the determination of the elongation of the elongation index of aggregates. MUHAMMAD AIZAT BIN ABD RASHID 2 OBJECTIVE. . It is a very useful way of working out the plasticity of a material and can help you understand the ways it might behave when subjected to pressure. Angularity Number = 67% - ((Ws/Gs*V)*100). The aggregates crushing value test should be performed as per IS code 2386 Part IV. Apparatus Required This test is used to determine the particle shape of the aggregate and each particle shape being preferred under specific conditions. Weve got details on everything you need to know. After attaining the max load, the load is released and is allowed to settle down. Page | 4 APPARATUS 1. Descriptions (see inserts in each panel) of cereal root ion fluxes in response to H 2 O 2 and hydroxyl radicals ( OH) in a single experiment. The weight of material retained in the sieve is found (W2). TEST DESCRIPTION: In order to calculate the elongation 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 flakiness & elongation index test is connected as thickness gauge and length gauge respectively. Procedure For Elongation Index Test of Aggregate:- Sieve the aggregate sample with sieves specified in the given Table 2. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi Mammalian Brain Chemistry Explains Everything. The Following is the procedure for elongation index, Separation of Elongation Material Elongation Test Try to pass the aggregate length -wise through the slot of 10mm to 6.3 mm on the length gauge. The Elongation Index of aggregates is the percentage by weight of particles whose greatest dimension (length) is greater than 1.8 times their mean dimension. JavaScript is disabled. You currently have no products in your enquiry cart, please continue browsing and select more products. This test is not applicable to sizes smaller than 6.3mm. Therefore, testing of aggregates becomes important. The Elongation test is discussed in this procedure. Take the aggregate sample which contains minimum 200 pieces of any fraction. A flakiness test is done to find the thickness of the aggregate i.e., the least lateral dimension. Elongation testing is a way to measure the ductility of a specimen through the application of tension. 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. DEFINITION. Elongation at Yield is the ratio between increased length and initial length at the yield point. Below mentioned are the tests available. Elongation index is more than 15% then the aggregate is undesirable for any construction work. The increase in a sample's gauge length measured after a rupture or break divided by the sample's original gauge length is referred to as elongation. DEFINITION The Flakiness Index of aggregates is the percentage by weight of particles whose least dimension (thickness) is less than 0.6 times . The elongation index test procedure contains following steps. GROUP MEMBERS 1. seperating the elongation particles and expressing their mass as a percentage of the mass of sample tested.From the experimen, the mean elongation index is 26.0 (sieve 28mm) and elongation index is 22.4%.So we get 1.16 < 1.8.We can classify the sample as not an elongation sample. : 55% Limited OFF on GATE Courses - Enrol here, Important Tests on Pavement Materials | Tests on Aggregate, The dried aggregate is immersed once again in the magnesium sulfate or sodium sulfate solution and the, case of sodium sulfate solution and 18% in. 2022 Industrial Physics. The greater the elongation, the higher the ductility or elasticity of the material. Test sieve size 63mm, 50mm, 37.5mm, 28mm, 20mm, 14mm, 10mm, 6.3mm 3. These cookies track visitors across websites and collect information to provide customized ads. 4. IRC recommends a crushing strength of 30% for the wearing course and 45% for the base course. Procedure of Shape Tests on Coarse Aggregates Sieve the sample through the IS sieves (as specified in the table). You can read the details below. The specimen is taken and sieved in a 2.36mm sieve. 2- The . 7 LAB TESTS ON "elongation index ." EN. The Elongation index on an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than 1.8 times their mean dimension. The aggregate retained on 63mm and passed through 6.3mm should not be considered. : Elongation Index Gauge Test Procedure 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. The test procedure involves the following steps. Length Gauge (Elongation Index) $135.00. The test procedure involves the following steps. Sales & Marketing: Sales 1 0813 8508 6310 Sales 2 0813 8508 6311 Jonny Sinaga 0813 8319 0190. The specimen is taken and sieved in a 2.36mm sieve. The entire setup is placed in a compression testing machine and is subjected to a load rating of 4 tons/min until it reaches a load of 40ton. Eng. 4. The cookies is used to store the user consent for the cookies in the category "Necessary". The elongation index of an aggregate is the percentage by weight of particles in . As such aggregate testing could be classified into two broad categories as mentioned below. Los Angels abrasion test is usually performed. The test is carried on aggregate sizes between 63 mm and 6.3 mm. . NAME: Flakiness & Elongation Index Test Gauges Quality Standard: As Per IS 2386 (P-I) Specification : Aggregates which are flaky and/or elongated will often lower the workability of a concrete mix and may also affect long term durability. The soundness value shall not exceed 12% in the case of sodium sulfate solution and 18% in the case of magnesium sulfate solution. In bituminous mixtures, flaky aggregates make for a harsh mix and may also crack and break up during . The result is typically normally expressed as a percentage, also known as percent elongation (% elongation). With this, we hope we had covered all the important topics related to the test on pavement materials. Abrasion test is done to find the wearing and tearing characteristics of the aggregate. { Elongation Index }=\frac{\text { Total weight retained on gauge }}{\text { Total weight on sieves }} * 100; Desirable values. The abrasion value shall not exceed 30% for the wearing course and 45-50% for the base course. Thickness Gauge (Flakiness Index) is a slotted stainless steel gauge for rapid hand trying of particles from the seven sieve fractions to determine the flakiness index. Visit our product area to browse through our vast range of testing solutions! Each piece of these are tried to be passed through specified length of the gauge length with its (Abrasion charges are spheres made of cast iron having a diameter of 48mm each and a weight of 390-450gm each). W2 - the weight of aggregate retained on slot having size 1.8 times the mean size of aggregate, W1 - Total weight of the aggregate sample, The elongation index shall not exceed 15%. Elongation Index for Classification of Aggregate Particles H-1682 For determining elongation index. A minimum number of 200 pieces 0f aggregate in each fraction is taken and weighted. Looks like youve clipped this slide to already. This cookie is set by GDPR Cookie Consent plugin. The test is not applicable to material passing 6.30 mm sieve or retained on 50 mm sieve. Elongation Index: As per IS 2386 (Part 2):1963, cl. The elongation, n, is length divided by breadth and the elongation ratio is 1/n. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. 03DKA16F2021 (A,B) Ion flux kinetics in root elongation zone (A) and mature zone (B) in response to H 2 O 2; (C,D) Ion flux kinetics in root elongation zone (C) and mature zone (D) in response to OH.Two distinctive flux points were identified in kinetics of responses . The test procedure involves the following steps. Now fill the aggregate in the mould along with the plunger on top. The different materials used such as tar, asphalt or whatever binding material adopted is to be observed for this test specifications. PUAN SALMA BINTI YAHYA The lab focuses on three types of eEFs; eEF1, eEF2 and eEF3 with most focus on the eEF1 which is the prototype of G- proteins. 2- A set of sieves. The test procedure involves the following steps. Particle is elongated when its length (longest dimension) is more than 1.8 of the midsize of the sieve fraction. Flakiness Index Test The elongation and flakiness test involves sieving the aggregates through a sieve with long parallel openings (as shown in the diagram below) which measures the amount of aggregates which are elongated which determines the flakiness index. 3. It is recommended that the desiredprocedure be reviewed carefully prior to conducting the test. Is sieves ( as specified in the given Table 2 6310 Sales 2 0813 8508 6311 Jonny Sinaga 8319. Elongation, the load is released and is allowed to settle down track visitors websites. ( thickness ) is less than 0.6 times 2386 Part IV to take your learnings offline and the... Load, the load is released and is allowed to settle down & quot ; EN apparatus Required test. And sieved in a 2.36mm sieve of an aggregate is undesirable for any work. 0F aggregate in the sieve fraction of any fraction ( % elongation ) plunger on top to settle.... 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