flakiness and elongation index astm

The Length Gauge (Elongation Index BS), is used to measure the elongation index of aggregates. Try to pass the aggregate length-wise through the slot of 10mm to 6.3 mm on the length gauge. Flakiness and Elongation Index of Aggregate - YouTube Elongated and flaky stones are normally not very suitable for road works since the shape and the size make them difficult to compact. The consent submitted will only be used for data processing originating from this website. Specifications: Additional Information Item Code AT-215-216 Interested in this product? Figure 5 or special sieves having elongated aper-. 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. All parts of equipment should be kept clean. Standard Test Method for Flat Particles, Elongated Particles, or Flat IS 2386(Part 1):1963 Methods of Test for Aggregates of Concrete- Particle Size and Shape. As such the flakiness and elongation test must be carried out to determine the suitability of the material. For base course and construction of bituminous and cement concrete type, the presence of flaky and elongated particles are considered undesirable as they may cause inherent weakness with possibilities of breaking down under heavy loads. Test each of the particles in each size fraction and place them into one of two groups: (1) Particles with longest to thinnest ratios over 5:1 and (2) Particles with . To determine the flakiness and elongation indices of the given aggregate sample. Elongation index is expressed as percentage of weight of aggregates passed retained on the gauge to the weight of sample in sieves. These aggregate particles consist of a high ratio of surface area to volume, which is useful in reducing the workability of concrete. The collected aggregate sample should have at least 200 numbers of individual aggregate for accurate test results from each range of IS sieve. Zaid Abdul Bari - Lab Supervisor - Element Materials Technology - LinkedIn The particle shape of aggregate can be described by the percentage of how flaky or how elongated the aggregate is. brochure (1) (4) - Read online for free. Flakiness and Elongation Index (Shape Test) of Aggregates as - Civil4M Aggregate related testing such as Sieve Analysis, Flakiness & Elongation, Specific gravity & water absorption, Loss Role and Responsibilities Description of soil and rock samples. REPORT LAB FLAKINESS AND ELONGATED.pdf - FACULTY OF LoginAsk is here to help you access Bulk Aggregate Calculator quickly and handle each specific case you encounter. Log in; Favorites List; . . If you have a query, you can ask a question here. For example, the flakiness index of the aggregates we can use in the construction of roads is typically less than 15%, and it should not exceed 25%. 2021| Elongation Index of Aggregate - Engineering Civil World Flakiness and Elongation Index Test are very important tests to be performed on aggregate in the laboratory. Required fields are marked *. TEST DESCRIPTION: Table 1 CCPW Materials Testing and Sampling Frequencies . Further Investigation on Damage Model of Eco-Friendly Basalt Fiber Modified Asphalt Mixture under Freeze-Thaw Cycles An aggregate is said to be flaky if its least lateral dimension is less than 0.6 times the mean dimension. COURTESY: AIC- LAB EQUIPMENTS. The samples passing through each sieve are then passed through the elongation gauge. 3.0 Apparatus a. The metal gauge used to measure the thickness/elongation is looked like this figure shown below: The IS Sieves: 63 mm, 50 mm, 40 mm, 31.5 mm, 25 mm, 20 mm, 16 mm, 12.5 mm, 10 mm, 6.3 mm. CALCULATION Note 1-This form is available from the Materials & Tests Division/Soils & Aggregates Section. For more information on Flakiness & Elongation of Aggregate, here are our related blogs: Copyright 2022 GlobalGilson.com. Flakiness (Thickness) Gauge | Testmak 1.1 This test method covers the determination of the percentages of flat particles, elongated particles, or flat and elongated particles in coarse aggregates. 2.0 Objective To determine the flakiness index of aggregates. Aggregate shape, size, and surface texture majorly affect the properties of freshly mixed concrete more than the properties of hardened concrete. Gauge should be cleaned thoroughly and dried before testing. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } COURTESY: GILSON, Fig 3: Set of Sieves. 56. After the end of test, sieve should be cleaned by smooth brush. Separation of Elongated Material- Each fraction shall be gauged individually for length on a metal length gauge of the pattern shown in Figure 4. - A balance of cap 5 kg to weigh the samples. '' sieve. ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles in Coarse Aggregates, American Society for Testing and Materials. (Separate test can be conducted on each range of Sieve). We can measure the elongation index of particles that are passing through a mesh size 63 mm and the particles retained on a mesh size 6.3 mm. The test does not apply to sizes smaller than 6.3 mm. Syed Fareed Ullah - State Board of Technical Education and Training To determine the Flakiness Index of the given sample of course aggregate. PDF Elongation index and flakiness index of coarse aggregate (BS 812 Part:1) The Dimension shown in the thickness gauge is equal to 0.6 times the mean sieve size. Gradation Test -ASTM 5444-98 Analysis Of Compacted Bitiminus Paving Mixture ASTM D 6927-15 ASTM D 2726-14 . The samples passing through each sieve are then passed through the flakiness gauge. ASTM D 2845-00; Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock. Help users access the login page while offering essential notes during the login process. 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. Sayed Sajid H.Zidani Sieve test YASMINE HASLAN Softhening point REPORT DCC2042 YASMINE HASLAN Transportation Engineering Laboratory Manual BASWESHWAR JIRWANKAR DCC3113 DETERMINATION OF AGGREGATE IMPACT VALUE. Aggregate Sampling Equipment Quick and Easy Solution Flakiness Index - CivilWeb Spreadsheets Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. Flakiness and Elongation - PCTE Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Reaffirmed Dec 2016 Figure 1 Flakiness Index: It is the percentage by weight of flaky particles in a sample. The Dimension shown in the length gauge is equal to 1.8 times the mean sieve size, Read More: Aggregate Crushing Value Test Procedure and Result. Flakiness Index (%) = Elongation Index (%) = If the index values are less than the limiting values specified by the standard, the sample marked qualified for the intended use. We take a range of aggregate samples retained on 6.3 mm IS Sieve. Assuring Accuracy on Testing on fresh concrete | compressive strength of concrete Finalize reporting of Material Testing, and Assuring Quality on | Soil Plate Load | In Situ Density (FDT) | MDD OMC | CBR | PSD | Flakiness index | Elongation index | Moisture Content | Liquid Limit | Plastic Flakiness Index Gauge | Aggregates - Gilson Co. - GlobalGilson.com Apparatus: The apparatus consists of; - A standard Thickness & Length Gauge - I.S. 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. Understanding Performance-Based Asphalt, Characteristics of Aggregates: Shape, Size & Specific Gravity. Materials | Free Full-Text | Mechanical, Physico-Chemical and ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles in Coarse Aggregates, American Society for Testing and Materials. In the calculation of the flakiness index of a sample of aggregates, we need to note the weight of each fraction of the aggregates that are passing through and retaining on the specific sieve we are using for the experiment. [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. Flakiness Index = weight of aggregate retained on length gauge of 10 mm to 6.3 mm (W2) / Total weight of aggregate sample taken (W1), For example, the Weight of aggregate retained on length gauge of 10 mm to 6.3mm(W2) = 150 gm, and Total weight of aggregate sample = 1000 gm, Elongation Index = (150 gm / 1000 gm) x 100 = 15%, Read More: Aggregate Testing | 7 Test On Aggregates | Coarse Aggregate Test. PRECAUTIONS That means the test is not applicable to sizes smaller than 6.3 mm aggregate. B. A separate sample retains on this slot and weighted it(W2). Flakiness and Elongation Index of Aggregate A weighing balance having an accuracy in measuring of 0.1% of the weight of sample. The flakiness index is used to describe the average particle shape of aggregates including those used for concrete. PDF An Evaluation of Relationship with Polished Stone Value and Skid Also, such irregularshaped aggregate cement content must also be increased to maintain the water-cement ratio. Close suggestions Search Search Generally, flaky and elongated aggregate are avoided or are limited to about 15 % by the weight of the total aggregate. The calculation of the flakiness index after this experiment is given below: In this equation, W1 is the total weight of aggregates, and W2 is the weight of aggregates passed through the 0.6 x dmean size sieve. Flakiness and Elongation Index Test of Coarse Aggregate - Civiconcepts It is not desirable to use flaky particles in construction of roads especially in surface course. YASMINE HASLAN Experiment no 03 Determination of the flakiness and the elongation index for . The key difference between flakiness index and elongation index is that flakiness index determines the concentration of flaky particles in a sample, whereas elongation index determines the concentration of elongated particles in a sample. Continue with Recommended Cookies. PDF Flakiness and Elongation Index of Aggregate Flakiness and Elongation Index Test This test gives the percentage of flaky and elongate aggregate present in the total aggregate sample. Elongation index is a aggregate that have length more than 1.8 sieve size. Maximum permitted Elongated index is 35, 40 or 45% for aggregate sizes 2 '' - 2'', 1 '' - '' & '' - 3/8''. This test is not applicable to sizes smaller than 6.3mm. The test flakiness index of aggregate is not applicable to the materials passing through the 6.30 mm IS test sieve or retained on the 63.00 mm IS test sieve while the test elongation index of aggregate is measured on particles passing through IS sieve size of 63mm and retained on IS sieve size of 6.3 mm. The presence of elongated aggregate particles in a mixture can disturb the packing of particles and also creates more space. 5. 54. APPARATUS REQUIRED: ASTM 4791-10: Standard Test Method for Flat Particles, Elongated Particles or Flat Elongated Particles in Coarse Aggregates, American Society for Testing and Materials. Centre for Diploma Studies. Weight on each sieve is noted as weight on sieve. To calculate the flakiness index of the given sample of aggregates, the weight of each fraction of aggregates passing and retaining on the specified set of sieves is noted first. Applied Sciences | Free Full-Text | Carbon Nanotubes (CNTs) in Asphalt 2. 13- Chakravarthi and all 2019 | PDF | Deformation (Engineering) | Young Note: As per IS standard Flakiness & Elongation Index taste are not applicable when aggregate size is smaller than 6.3mm. This weight is then divided by the total weight of sample taken from different range of sizes and the ratio is expressed in percentage which is the desired flakiness index. . About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . 45 mm. Elongation index The percentage by weight of the elongated particles present in a given test sample. Flakiness And Elongation Index Properties and Testing of. Table 1: Limits of Flakiness Index for different types of pavements (SOURCE: MORTH). Why flakiness and elongation test is done? We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. A separate sample passed through this slot and weight (W2), Flakiness Index = Weight of aggregate passed through width gauge 10 mm to 6.3 mm (W2) / Total weight of aggregate sample taken (W1), For example, Weight of aggregate passed through width gauge of 10 mm to 6.3mm(W2) = 200 gm and Total weight of aggregate sample = 1000 gm, Flakiness Index = (200 gm / 1000 gm) x 100 = 20%. Open navigation menu. ASTM International: West Conshohocken, PA, USA, 1995. 6. 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. IRC recommended the Flakiness index value for road construction be below 35%.SR NO.TYPE OF CONSTRUCTIONALLOWABLE FLAKINESS INDEX1WBM constructionWearing surface15%lower granular layer15%2Concrete construction3Bituminous construction25%4Two coat bituminous surface dressing25%5Bituminous macadamBase course25%Binder course25%6Dense bituminous macadam35%, Copyright [2019 - 2022] [Civiconcepts.com] | by [Bhushan Mahajan], 3040 House Plans | 1200 sq ft House Plan, Flakiness and Elongation Index Test of Coarse Aggregate | Flakiness Index | Elongation Index | Result, Weight of aggregate passed through width gauge 10 mm to 6.3 mm (W2), weight of aggregate retained on length gauge of 10 mm to 6.3 mm (W2), IRC recommended the Flakiness Index Value, Aggregate Impact Value Test, Procedure, Result & Standard, Aggregate Crushing Value Test Procedure and Result, Abrasion Test on Aggregate (Los Angeles Test), Aggregate Testing | 7 Test On Aggregates | Coarse Aggregate Test, Abrasion Test on Aggregate | Los Angeles Abrasion Test, Compressive Strength of Concrete | Concrete Cube Strength at 3 days, 7 days, 14 days & 28 days | Cube Test of Concrete, What To Do If Concrete Cube Fails After 28 days | Concrete Cube Test Failure Reasons, What Is Fineness of Cement | Fineness Test of Cement, Defects In Timber | Top Defects Of Timber | 5 Different Types of Defects In Timber | Foxiness In Timber, 15 Types of Drywall Anchors | Different Types Of Wall Anchors | Dry Wall Anchors Types | Best Types of Wall Anchors For Wall, Types Of Gutters | 22 Different Types of Gutters | Rain Gutter Downspout | Best Types of Rain Gutter For House, 12 Types of Rugs | Different Types of Rugs With Pictures | Best Types of Rug For Living Room | Best Rug For Bedroom, 15 Types of Mattresses | Different Types of Mattresses | Most Popular Mattress Types, 15 Types of Fans | Different Types of Fans For Home | Ceiling Fan Type | Best Fan Types & Their Uses, 10 Different Types of Stoves | Best Stoves Types | Top Different Kinds Of Stoves, 22 Types of Drill Bits | Drill Bit Types And Uses | Different Drill Bits Name | Best Drill Bits For Cutting Work, 40 Types Of Tables | Different Types of Tables | Best Types Of Table For Living Room | Different Kinds Of Tables, 10 Types of Shovels | Different Types of Shovels With Pictures | Best Shovels For Digging Work, 15 Different Types of Plywood | What Is Plywood and Their Types | 15 Best Types of Plywood for Furniture, 30 Types of Clamps and Their Uses | 30 Different Types Clamps and Uses | Best Clamps For Home Uses, 10 Concrete Finishes Types | 10 Best Types of Concrete Finishes | Different Concrete Finishes | Concrete Surface Finishes, 25 Types of Hammers | Different Types of Hammers and Their Uses | Top 25 Hammers Types, 10 Different Types of Ladders and Their Uses | Best Types of Ladders | Material Used For Ladders, 17 Types Of Contractors | What Is Contractor | 17 Different Types of Contractors | List of Contractors, 13 Types of Door Hinges | Types of Hinges Used For Door | Different Types Of Door Hinges | What Is A Butt Hinge, 21 Different Types of Couches For Home | Guide.

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