The ductility of bituminous material is the distance in centimeters to which it will elongate before breaking when a briquette specimen of the materials. It composes 87% carbon, 11% hydrogen and 2% oxygen by weight. The test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to f. To measure the ductility of a given bitumen sample.
Pdf critical problems with using the asphalt ductility test. Dimension of the briquette thus formed is exactly 1 cm square. Determine ductility of bitumen and its suitability for road. The asphalt ductility test, as currently carried out in accordance to the astm d17 specification 1, is a measure of the ultimate elongation of an asphalt binder sample at a constant rate and. To determine the suitability of bitumen for its use in road construction. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is. Ductility is a key component of overall weldability since weld cracking is often associated with an exhaustion of available ductility.
Apr 09, 2017 objective i to compute the ductility of a specific specimen of bitumen ii to assess the suitability of bitumen for its application in road construction. Tests applied on bitumen procedure of tests on asphalt. Determining the ductility of bitumen civil engineering. Ductility test report report the average of three normal tests as ductility of the sample, provided that. Pdf critical problems with using the asphalt ductility test as a. Bitumen is a black or brown mixture of hydrocarbons obtained by partial distillation of crude petroleum. Ductility test is conducted to determine the amount bitumen will stretch at temperature below its softening point. This test method describes the procedure for determining the ductility of a bituminous material measured by the distance to which it will elongate before. Many tests are done to ensure the quality of bitumen.
The ductility of a bituminous material is measured by the distance in cm to which it will elongate before breaking when a standard briquette. Performance tests on bitumen and bituminous mixes vincenzo buccino pietro ferrari three levels of interpretation may be identified in this article. Various laboratory tests on bitumen is conducted to check quality and different properties of bitumen for pavement construction. An analysis of the primary factors governing the ductility of bitumens, as determined by the well. To determine the suitability of bitumen for its use in road construction apparatus. To determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. Ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. Ductility test this test measure the adhesive properly of bitumen and its ability to stretch. The hot ductility test simulates the metallurgical degradation that occurs during a weld thermal cycle and provides a measure of the ductility of the alloy at high temperatures. Nado rinchen dhendup tashi pemba tshering rigesh lama rohit adhikari.
In viscosity grade viscosity test are conducted at 60 c and 5 c which represents the temperature of road surface during summer and. The bitumen sample is melted to a temperature of 75 to 100 c above the approximate. If malleable, a material may be flattened by hammering or rolling. Third, the asphalt test, ductility test on bitumen tester main technical parameters and indicators 1 power supply. Pdf the research investigates the properties of bitumen modified with used tyre. It is generally considered that an asphalt with a very low ductility will have poor adhesive properties and thus poor performance in service.
When a lowtemperature ductility test is desired, the test should be run at a temperature of 39. To obtain the ductility value of bituminous sample. The ductility test is performed for determining the ductility of bituminous materials by measuring the elongation before breaking when two ends of briquette specimens are. Standard test method for ductility of bituminous materials. The new viscosity grading system conforms to is 732006 paving bitumenspecification third revision. Make at least three determinations at points on the surface of the sample not less than 10mm apart and not less than 10mm from the side of the dish.
Ductility is when a solid material stretches under tensile stress. The ductility test is measure of cohesiveness and elasticity of the bitumen. Determining the ductility of bitumen linkedin slideshare. If ductile, a material may be stretched into a wire. Critical problems with using the asphalt ductility test as a performance index for modified binders. Standard ductilometer for ductility test ductimeter.
Ductility values ranges from 0 to over 150 depending on the type of bitumen. Ductility testing of bitumen by astm and custom methods in one unit august 19, 2016 august 15, 2016 sophie bryant leave a comment ductility is defined as the ability to undergo great deformation or elongation in testing terms, it is the distance in mm which a standard sample of bitumen may be elongated to before breaking, when stretched at. We know that the ductility of a material is the ability of that material to undergo plastic deformation permanent deformation. The test is conducted at 27c and at a rate of pull of 50mm per minute. Critical problems with using the asphalt ductility test as. Asphalt ductility tester is commonly used petroleum testing equipment. Standard test method for ductility of asphalt materials. Unless otherwise specified, the test shall be made at a temperature of 25 0. This dish of at least 350 ml capacity is fitted with a suitable support to hold the sample container firm and level during testing. To perform ductility test on bitumen ductility is the property of bitumen that permits it to undergo great deformation or elongation. Now customize the name of a clipboard to store your clips.
The ductility test astm d1 measures the distance a standard asphalt sample will stretch without breaking under a standard testing condition 5 cmmin at 25 c. Malleability, a similar property, is a materials ability to deform under pressure compressive stress. The instrument for measuring the hardness of bitumen. In flexible pavement design, it is necessary that binder should form a thin ductile film around aggregates so that physical interlocking of the aggregates is improved binder material having insufficient ductility gets cracked when subjected to repeated traffic. The average penetration value of 3 tests of a given bitumen sample is reported. The distance at which the bitumen thread of each specimen breaks is recorded in cm to report as ductility value. Determine ductility of bitumen and its suitability for road construction. The new viscosity grading system conforms to is 732006 paving bitumen specification third revision. Sep 20, 2017 penetration test the penetration test determines the hardness or softness of bitumen.
At least three determinations shall be made for each test. Aug 19, 2016 ductility testing of bitumen by astm and custom methods in one unit august 19, 2016 august 15, 2016 sophie bryant leave a comment ductility is defined as the ability to undergo great deformation or elongation in testing terms, it is the distance in mm which a standard sample of bitumen may be elongated to before breaking, when stretched at. The ductility of a bituminous material is measured by the distance in cm to which it will elongate before breaking when a standard briquette specimen of the material is pulled. A study on the significance of the ductility test for. The bitumen sample is heated and poured in the molds assembly placed on a plate. Ductility test the ductility test astm dll3 measures the distance a standard asphalt sample will stretch without breaking under a standard testing condition 5 emmin at 25 c. Determine ductility of bitumen and its suitability for. Melt the bitumen to be tested to a temperature of 75 to c above its. Bitumen is very important component of many construction sites like roads, highways. The ductility can be described as the distance of elongation to which a bitumen. Penetration test the penetration test determines the hardness or softness of bitumen. Oct 09, 2018 ductility test on bitumen measures the distance in centimeters to which it elongates before breaking.
The temperature of the penetration test was 25c, the ductility tests of the binders 90a and. Ductility is defined as the distance in cm, to which a standard sample or briquette of the material will be elongated without breaking. Importance of ductility ductility test of bitumen is. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value. Viscosity grade bitumen is categorized according to viscosity. Since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. We know that the ductility of a material is the ability of that material to undergo plastic deformation permanent deformation before the rupturing breaking of that material. To perform ductility test on bitumen civil engineering. Nov 20, 2017 since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. Critical problems with using the asphalt ductility test as a. Theory of ductility test on bitumen the ductility test gives a measure of adhesive property of bitumen and its ability to stretch. Tests on bitumen there are a number of tests to assess the properties of bituminous materials. The aim of this research was to evaluate the effect of filler on the ductility of fillerbitumen mastics, as a surrogate of the cohesive behaviour and the tensile properties. There are many tests which are conducted to check the quality of bitumen.
Basic tests such as penetration, softening point, viscosity, flash. A study on the significance of the ductility test for bitumen. The ductility test is performed for determining the ductility of bituminous materials by measuring the elongation before breaking when two ends of briquette specimens are pulled apart at a specified speed and temperature. The instrument is designed and made as per the national standard gbt 4508 test methods for ductility of petroleum asphalt, and t0605 asphalt ductility test in the industry standard jtj052 specification and test methods of bitumen and bituminous mixture for highway engineering. This test method describes the procedure for determining the ductility of a bituminous material measured by the. Faculty of civil engineering pavement laboratory ductility test introduction. Both of these properties are aspects of plasticity. Ductility test of bitumen 22 jan 2018 1 apr 2018 aim.
The ductility test is used to describe the ductile and tensile behavior of bituminous binders. Empirical rheological tests carried out on unmodified and modified bitumen with different. For this, ten different fillers were mixed with one bitumen type, in two fillertobitumen ratios, and tested using the forceductility test. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article. This test is done to determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. Ductility test is no longer mandatory for specification compliance.
Ductility is the property of bitumen that permits it to undergo great deformation or elongation. D 186related theory ductility test on asphalt, ductility. Release the needle for five seconds and measure the distance penetrated. The ductility of a bituminous material is defined as the distance in centimeters, to which it will elongate before breaking when two ends of a briquet specimen of the material, are pulled apart at a specified speed and a specified temperature. The hotductility test simulates the metallurgical degradation that occurs during a weld thermal cycle and provides a measure of the ductility of the alloy at. Ductility is the property of bitumen 4050 60100 and 80100 that permits it to undergo great deformation or elongation. Note 2the precision statement for ductility, as presented in fig. Various lab tests on bitumen for pavement construction. The ductility of a bituminous material is measured by the distance in cm to which it will elongate before breaking when a standard briquette specimen of the.
Ductility simple english wikipedia, the free encyclopedia. Clipping is a handy way to collect important slides you want to go back to later. A briquette having a cross sectional area of 1 in 2 is placed in a tester at 77 f. May 12, 20 while the test is in operation, it is checked whether the sample is immersed in water at depth of at least 10 mm. The test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to flow. It is generally considered that an asphalt with a very low ductility will have. Objective i to compute the ductility of a specific specimen of bitumen ii to assess the suitability of bitumen for its application in road construction. Circular holes are made at ends known as clips to grasp the stationary.
Ductility test of bitumen is one of the main testes that you need to do during road construction. Critical problems with using the asphalt ductility test as a performance index. Learn about ductility testing and the material testing solutions we provide for ductility testing. The first, which is the most practical, consists in identifying the limits imposed on the requisites of certain tests, performed on bitumen and its mix, as a function of the minimum and maximum. Pdf critical problems with using the asphalt ductility. Ductility test report report the average of three normal.
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