The ductility test is used to describe the ductile and tensile behavior of bituminous binders. Critical problems with using the asphalt ductility test as. Determining the ductility of bitumen civil engineering. 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 when a solid material stretches under tensile stress. Theory of ductility test on bitumen the ductility test gives a measure of adhesive property of bitumen and its ability to stretch.
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. 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. Circular holes are made at ends known as clips to grasp the stationary. Ductility is a key component of overall weldability since weld cracking is often associated with an exhaustion of available ductility. The new viscosity grading system conforms to is 732006 paving bitumenspecification third revision. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value. Ductility test this test measure the adhesive properly of bitumen and its ability to stretch. 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. Exp 11 ductility test on asphalt civil engineers pk. The test is conducted at 27c and at a rate of pull of 50mm per minute. The ductility can be described as the distance of elongation to which a. Tests applied on bitumen procedure of tests on asphalt.
To measure the ductility of a given bitumen sample. To perform ductility test on bitumen ductility is the property of bitumen that permits it to undergo great deformation or elongation. D 186related theory ductility test on asphalt, ductility. If the road surface can stretch a little under heavy loads, it is bound to last for a while without repairs. The test is designed primarily for polymermodified emulsions. Learn about ductility testing and the material testing solutions we provide for ductility testing. Ductility test of bitumen 22 jan 2018 1 apr 2018 aim. Various lab tests on bitumen for pavement construction.
Note 2the precision statement for ductility, as presented in fig. Nado rinchen dhendup tashi pemba tshering rigesh lama rohit adhikari. Both of these properties are aspects of plasticity. Critical problems with using the asphalt ductility test as a. Ductility values ranges from 0 to over 150 depending on the type of bitumen.
Aashto t 300 standard method of test for force ductility. Nov 20, 2017 since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. Read a detailed procedure of bitumen penetration test with sample data. Ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. Melt the bitumen to be tested to a temperature of 75 to c above its. In elastic pavement design, it is important that binder has to create a shrill ductile film round aggregates so that physical interconnecting of the aggregates is amended. If ductile, a material may be stretched into a wire. The bitumen sample is melted to a temperature of 75 to 100 c above the approximate. There are many tests which are conducted to check the quality of bitumen.
Bitumen is very important component of many construction sites like roads, highways. Various laboratory tests on bitumen is conducted to check quality and different properties of bitumen for pavement construction. A study on the significance of the ductility test for. Faculty of civil engineering pavement laboratory ductility test introduction. 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 measure of cohesiveness and elasticity of the bitumen. First, asphalt test, ductility test on bitumen tester introduction asphalt ductility tester is commonly used petroleum testing equipment.
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 before the rupturing breaking of that material. Bitumen is a black or brown mixture of hydrocarbons obtained by partial distillation of crude petroleum. This test method describes the procedure for determining the ductility of a bituminous material measured by the distance to which it will elongate before. Seminar presentation on bitumen free download as powerpoint presentation. Apr 09, 2017 the ductility provides the extent of adhesive nature or the properties possessed of bitumen and its capacity to stretch. We know that the ductility of a material is the ability of that material to undergo plastic deformation permanent deformation. 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. Standard test method for ductility of asphalt materials.
The ductility of bituminous material is the distance in centimeters to which it will elongate before breaking when a briquette specimen of the materials. To determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. 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. Since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. Clipping is a handy way to collect important slides you want to go back to later. The average penetration value of 3 tests of a given bitumen sample is reported. To obtain the ductility value of bituminous sample. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article. The temperature of the penetration test was 25c, the ductility tests of the binders 90a 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. Determine ductility of bitumen and its suitability for. 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.
This test may involve hazardous materials, operations, and equipment. If malleable, a material may be flattened by hammering or rolling. To perform ductility test on bitumen civil engineering. Pdf critical problems with using the asphalt ductility test. Oct 09, 2018 ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. This test is done to determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. It is generally considered that an asphalt with a very low ductility will have.
For this, ten different fillers were mixed with one bitumen type, in two filler. Standard test method for ductility of bituminous materials. Determining the ductility of bitumen linkedin slideshare. Viscosity grade bitumen is categorized according to viscosity.
Release the needle for five seconds and measure the distance penetrated. To determine the suitability of bitumen for its use in road construction. Empirical rheological tests carried out on unmodified and modified bitumen with different. This dish of at least 350 ml capacity is fitted with a suitable support to hold the sample container firm. Pdf critical problems with using the asphalt ductility. 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. Critical problems with using the asphalt ductility test as a performance index for modified binders. 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 the property of bitumen 4050 60100 and 80100 that permits it to undergo great deformation or elongation. Tests on bitumen there are a number of tests to assess the properties of bituminous materials. The following tests are usually conducted to evaluate different properties of bituminous materials. Malleability, a similar property, is a materials ability to deform under pressure compressive stress. Performance tests on bitumen and bituminous mixes vincenzo buccino pietro ferrari three levels of interpretation may be identified in this article. When a lowtemperature ductility test is desired, the test should be run at a temperature of 39. 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. An analysis of the primary factors governing the ductility of bitumens, as determined by the well. Ductility simple english wikipedia, the free encyclopedia. While the test is in operation, it is checked whether the sample is immersed in water at depth of at least 10 mm. 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. At least three determinations shall be made for each test.
The test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to flow. 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. In viscosity grade viscosity test are conducted at 60 c and 5 c which represents the temperature of road surface during summer and. Melt the bitumen to be tested to a temperature of 75 to c above its approximate softening point till it becomes fluid. Many tests are done to ensure the quality of bitumen. Dimension of the briquette thus formed is exactly 1 cm square. The instrument for measuring the hardness of bitumen. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. It composes 87% carbon, 11% hydrogen and 2% oxygen by weight. Standard ductilometer for ductility test ductimeter. The ductility test gives a measure of adhesive property of bitumen and its ability to stretch. Ductility is defined as the distance in cm, to which a standard sample or briquette of the material will be elongated without breaking. Now customize the name of a clipboard to store your clips. 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.
Ductility test is no longer mandatory for specification compliance. The instrument is based on the prc standard gb t 4508 asphalt ductility test, peoples republic of industry standard jtg e202011 road asphalt and asphalt testing procedures in the t 0605. Sep 20, 2017 penetration test the penetration test determines the hardness or softness of bitumen. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility. 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. Determine ductility of bitumen and its suitability for road construction. Importance of ductility ductility test of bitumen is. Ductility is the property of bitumen that permits it to undergo great deformation or elongation. The bitumen sample is heated and poured in the molds assembly placed on a plate. 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. 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.
To determine the suitability of bitumen for its use in road construction apparatus. 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 ductility of a bituminous material is measured by the distance in cm to which it will elongate before breaking when a standard briquette. A briquette having a cross sectional area of 1 in 2 is placed in a tester at 77 f. Determine ductility of bitumen and its suitability for road. The new viscosity grading system conforms to is 732006 paving bitumen specification third revision. Third, the asphalt test, ductility test on bitumen tester main technical parameters and indicators 1 power supply. This test does not purport to address all of the safety concerns associated with its. Unless otherwise specified, the test shall be made at a temperature of. 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. Asphalt ductility tester is commonly used petroleum testing equipment. 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. Ductility test report report the average of three normal tests as ductility of the sample, provided that.