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. D 186related theory ductility test on asphalt, ductility. It composes 87% carbon, 11% hydrogen and 2% oxygen by weight. 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. Ductility is a key component of overall weldability since weld cracking is often associated with an exhaustion of available ductility. Bitumenasphalt cement to check quality and properties for pavement mascarina, dianalyn a. Asphalt ductility tester is commonly used petroleum testing equipment. Release the needle for five seconds and measure the distance penetrated. Ductility machines are used to determine the ductility of formed asphaltcement or semisolid bitumen by. Aashto t 300 standard method of test for force ductility. Many tests are done to ensure the quality of bitumen. 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. There are many tests which are conducted to check the quality of bitumen. Empirical rheological tests carried out on unmodified and modified bitumen with different.
Pdf critical problems with using the asphalt ductility test as a. To determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. 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. Critical problems with using the asphalt ductility test as a. When a lowtemperature ductility test is desired, the test should be run at a temperature of 39. The distance, at which the bitumen thread of each specimen breaks, is recorded in cm to report as ductility value. Bitumen is very important component of many construction sites like roads, highways.
The test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to f. 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. Viscosity grade bitumen is categorized according to viscosity. The average penetration value of 3 tests of a given bitumen sample is reported. Ductility test of bitumen is one of the main testes that you need to do during road construction.
Faculty of civil engineering pavement laboratory ductility test introduction. Determine ductility of bitumen and its suitability for. Ductility is defined as the distance in cm, to which a standard sample or briquette of the material will be elongated without breaking. 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. Nov 20, 2017 since roads involve vehicular traffic and heavy loads, they need to be built to last for a while.
The ends of a molded specimen are pulled apart in a liquidfilled trough at specified speed and temperature. According to shigleys mechanical engineering design 10th ed. While the test is in operation, it is checked whether the sample is immersed in water at depth of at least 10mm. Dimension of the briquette thus formed is exactly 1 cm square. 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. Bitumen is a black or brown mixture of hydrocarbons obtained by partial distillation of crude petroleum. 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 bitumen sample is melted to a temperature of 75 to 100 c above the approximate. 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. 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. This test method describes the procedure for determining the ductility of a bituminous material measured by the distance to which it will elongate before.
Standard test method for ductility of asphalt materials. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. The ductility of bituminous material is the distance in centimeters to which it will elongate before breaking when a briquette specimen of the materials. 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.
To perform ductility test on bitumen civil engineering. Ductility tester ductility test apparatus for bitumen. 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. An analysis of the primary factors governing the ductility of bitumens, as determined by the wellknown test, is given. The temperature of the penetration test was 25c, the ductility tests of the binders 90a and. Performance tests on bitumen and bituminous mixes vincenzo buccino pietro ferrari three levels of interpretation may be identified in this article. Ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. In viscosity grade viscosity test are conducted at 60 c and 5 c which represents the temperature of road surface during summer and.
First, asphalt test, ductility test on bitumen tester introduction asphalt ductility tester is commonly used petroleum testing equipment. Determine ductility of bitumen and its suitability for road construction. Circular holes are made at ends known as clips to grasp the stationary. Exp 11 ductility test on asphalt civil engineers pk. The new viscosity grading system conforms to is 732006 paving bitumenspecification third revision. This test method describes the procedure for determining the ductility of a bituminous material measured by. Determine ductility of bitumen and its suitability for road.
This test may involve hazardous materials, operations, and equipment. Various lab tests on bitumen for pavement construction. 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. Ductility values ranges from 0 to over 150 depending on the type of bitumen. Various laboratory tests on bitumen is conducted to check quality and different properties of bitumen for pavement construction. Nado rinchen dhendup tashi pemba tshering rigesh lama rohit adhikari. Standard test method for ductility of bituminous materials.
Ductility test apparatus conducts ductility tests of bituminous materials to measure the elongation of a binder specimen before failure. This test method describes the procedure for determining the ductility of a bituminous material measured by the. Determining the ductility of bitumen civil engineering. The bitumen sample is heated and poured in the molds assembly placed on a plate. Importance of ductility ductility test of bitumen is.
This test does not purport to address all of the safety concerns associated with its use. Ductility test is conducted to determine the amount bitumen will stretch at temperature below its softening point. Critical problems with using the asphalt ductility test as. To determine the suitability of bitumen for its use in road construction. 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. The ductility test gives a measure of adhesive property of bitumen and its ability to stretch. Standard ductilometer for ductility test ductimeter. After stirring the fluid, pour it in the mould assembly and place it on a brass plate. 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. Third, the asphalt test, ductility test on bitumen tester main technical parameters and indicators 1 power supply. The distance at which the bitumen thread of each specimen breaks is recorded in cm to report as ductility value. Ductility test report report the average of three normal.
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. Ensure that the area to be tested is dry and free from loose materials. When a lowtemperature ductility test is desired, the test should be made at a temperature of 4c 39. 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. Ductility is the property of bitumen 4050 60100 and 80100 that permits it to undergo great deformation or elongation. Oct 09, 2018 ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. 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. 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 on bitumen measures ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. Note 2the precision statement for ductility, as presented in fig. Melt the bitumen to be tested to a temperature of 75 to c above its. To measure the ductility of a given bitumen sample. 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. 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.
It is generally considered that an asphalt with a very low ductility will have poor adhesive properties and thus poor performance in service. The ductility test is measure of cohesiveness and elasticity of the bitumen. At least three determinations shall be made for each test. 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. To perform ductility test on bitumen ductility is the property of bitumen that permits it to undergo great deformation or elongation. The ductility can be described as the distance of elongation to which a bitumen. If the road surface can stretch a little under heavy loads, it is bound to last for a while without repairs. 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. Unless otherwise specified, the test shall be made at a temperature of 25 0. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article. 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.
The ductility test is used to describe the ductile and tensile behavior of bituminous binders. A study on the significance of the ductility test for bitumen. The viscosity of bitumen is reduced some times by a volatile diluents this material is called cutback. 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. To determine the suitability of bitumen for its use in road construction apparatus. 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. Ductility test ductility is the property of bitumen that permits it to undergo great deformation or elongation. Ductility is the property of bitumen that permits it to undergo great deformation or elongation.