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