The distance, at which the bitumen thread of each specimen breaks, is recorded in cm to report as ductility value. 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. 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. Tensile strength and ductility of specimens can be measured concurrently with the addition of the force ductility kits. Melt the bitumen to be tested to a temperature of 75 to c above its. When a lowtemperature ductility test is desired, the test should be run at a temperature of 39. 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.
Ductility test of bitumen is one of the main testes that you need to do during road construction. Ductility is a measure of a materials ability to undergo significant plastic deformation before rupture, which may be expressed as percent elongation or percent area reduction from a tensile test. 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. Many tests are done to ensure the quality of bitumen. The distance at which the bitumen thread of each specimen breaks is recorded in cm to report as ductility value. Viscosity grade bitumen is categorized according to viscosity. Empirical rheological tests carried out on unmodified and modified bitumen with different. The ductility test is used to describe the ductile and tensile behavior of bituminous binders.
Performance tests on bitumen and bituminous mixes vincenzo buccino pietro ferrari three levels of interpretation may be identified in this article. If the road surface can stretch a little under heavy loads, it is bound to last for a while without repairs. Determining the ductility of bitumen civil engineering. Various tests ductility tests on bitumen flash and fire point tests on bitumen float tests on bitumen loss on heating tests on bitumen penetration test on bitumen softening point test on bitumen specific gravity test on bitumen viscosity test on bitumen water content test on bitumen 1. Unless otherwise specified, the test shall be made at a temperature of 25 0. Critical problems with using the asphalt ductility test as a. This test is done to determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. 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. A study on the significance of the ductility test for bitumen. To determine the suitability of bitumen for its use in road construction apparatus. The average penetration value of 3 tests of a given bitumen sample is reported. Importance of ductility ductility test of bitumen is.
Various laboratory tests on bitumen is conducted to check quality and different properties of bitumen for pavement construction. D 186related theory ductility test on asphalt, ductility. Ductility is defined as the distance in cm, to which a standard sample or briquette of the material will be elongated without breaking. 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. 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. Dimension of the briquette thus formed is exactly 1 cm square. Oct 09, 2018 ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. The test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to flow. A briquette having a cross sectional area of 1 in 2 is placed in a tester at 77 f. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. 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.
The ductility can be described as the distance of elongation to which a bitumen. To determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. It composes 87% carbon, 11% hydrogen and 2% oxygen by weight. 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 high temperatures. 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. Procedure for the ductility test of bitumen the bituminous material tested is completely melted by heating it to a temperature of 75 to 100 degree celcius above the approximate softening point until it becomes thoroughly fluid. Bitumen is a black or brown mixture of hydrocarbons obtained by partial distillation of crude petroleum. Bitumenasphalt cement to check quality and properties for pavement mascarina, dianalyn a. It is generally considered that an asphalt with a very low ductility will have poor adhesive properties and thus poor performance in service.
Bitumen tests ductility test ductility is the property of bitumen that permits it to undergo great deformation or elongation. Determine ductility of bitumen and its suitability for. 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. Ductility is the property of bitumen 4050 60100 and 80100 that permits it to undergo great deformation or elongation. Ductility test on bitumen measures ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. Asphalt ductility tester is commonly used petroleum testing equipment. This test method describes the procedure for determining the ductility of a bituminous material measured by. This test does not purport to address all of the safety concerns associated with its use. Melt the bituminous test material completely at a temperature of 75c to 100 c above the approximate softening point until it becomes thoroughly fluid. This test method describes the procedure for determining the ductility of a bituminous material measured by the. Ductility is a key component of overall weldability since weld cracking is often associated with an exhaustion of available ductility. We know that the ductility of a material is the ability of that material to undergo plastic deformation permanent deformation.
Ductility is a measure of a materials ability to undergo significant plastic deformation before rupture or breaking, which may be expressed as percent elongation or percent area reduction from a tensile test. According to shigleys mechanical engineering design 10th ed. Ductility test report report the average of three normal. Various tests ductility tests on bitumen flash and fire point tests on bitumen float tests on bitumen loss on heating tests on bitumen penetration test on bitumen softening point test on bitumen specific gravity test on bitumen viscosity test on bitumen water content test on. This test method describes the procedure for determining the ductility of a bituminous material measured by the distance to which it will elongate before. 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. 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 ductility test gives a measure of adhesive property of bitumen and its ability to stretch. Pdf critical problems with using the asphalt ductility test as a. Ductility test is conducted to determine the amount bitumen will stretch at temperature below its softening point.
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 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. The test is designed primarily for polymermodified emulsions. To determine the suitability of bitumen for its use in road construction. Melt the bitumen to be tested to a temperature of 75 to c above its approximate softening point till it becomes fluid. Assemble the mould on a brass plate and coated on all the sides with a mixture glycerin and dextrin of equal parts to avoid sticking of the material. Ductility is the property of bitumen that permits it to undergo great deformation or elongation. Ductility test apparatus conducts ductility tests of bituminous materials to measure the elongation of a binder specimen before failure. Faculty of civil engineering pavement laboratory ductility test introduction.
After stirring the fluid, pour it in the mould assembly and place it on a brass plate. Ductility tester ductility test apparatus for bitumen. While the test is in operation, it is checked whether the sample is immersed in water at depth of at least 10mm. Ductility values ranges from 0 to over 150 depending on the type of bitumen. Ductility machines are used to determine the ductility of formed asphaltcement or semisolid bitumen by. Ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. Unless otherwise specified the test should be conducted at a temperature of 25 0. This test may involve hazardous materials, operations, and equipment. 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 06052011 asphalt. Third, the asphalt test, ductility test on bitumen tester main technical parameters and indicators 1 power supply. Bitumen is very important component of many construction sites like roads, highways.
Standard test method for ductility of bituminous materials. Determine ductility of bitumen and its suitability for road construction. To measure the ductility of a given bitumen sample. The new viscosity grading system conforms to is 732006 paving bitumenspecification third revision. Since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. Nado rinchen dhendup tashi pemba tshering rigesh lama rohit adhikari. At least three determinations shall be made for each test. 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. The test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to f. Note 2the precision statement for ductility, as presented in fig. 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. An analysis of the primary factors governing the ductility of bitumens, as determined by the wellknown test, is given. 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 bitumen sample is melted to a temperature of 75 to 100 c above the approximate. Various lab tests on bitumen for pavement construction. Circular holes are made at ends known as clips to grasp the stationary. Exp 11 ductility test on asphalt civil engineers pk. The bitumen sample is heated and poured in the molds assembly placed on a plate. To perform ductility test on bitumen ductility is the property of bitumen that permits it to undergo great deformation or elongation. In viscosity grade viscosity test are conducted at 60 c and 5 c which represents the temperature of road surface during summer and.
The viscosity of bitumen is reduced some times by a volatile diluents this material is called cutback. Ensure that the area to be tested is dry and free from loose materials. 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. 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. The temperature of the penetration test was 25c, the ductility tests of the binders 90a and.
To perform ductility test on bitumen civil engineering. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article. There are many tests which are conducted to check the quality of bitumen. Nov 20, 2017 since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. Determine ductility of bitumen and its suitability for road. The ductility test is measure of cohesiveness and elasticity of the bitumen. When a lowtemperature ductility test is desired, the test should be made at a temperature of 4c 39.
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