Standard test method for ductility of bituminous materials1. Standard ductilometer for ductility test ductimeter. 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. Oct 09, 2018 ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. In hot climates, a lower penetration grade is preferred. A crucial feature of the binder is its ductility and the degree of ductility has an effect on the cracking of bituminous surfaces caused by traffic stress. Nov 20, 2017 since roads involve vehicular traffic and heavy loads, they need to be built to last for a while. Basic tests such as penetration, softening point, viscosity, flash and fire point and ductility test were carried out by using shredded waste. The minimum ductility values specified by indian standards institution for various grades of bitumen available in india are given below. Since roads involve vehicular traffic and heavy loads, they need to be built to last for a while.
Ductility test on bitumen measures the distance in centimeters to which it elongates before breaking. What is the importance of the ductility test of bitumen. A briquette having a cross sectional area of 1 in 2 is placed in a tester at 77 f. There are different types of bitumen available with different properties, specifications and uses based on requirements of consuming industry. For bitumen construction minimum ductility of 50 cm. Pdf despite the adaptation of advanced binder rheology characterization methods by many agencies, the asphalt ductility test is still under use in. Now customize the name of a clipboard to store your clips. Circular holes are made at ends known as clips to grasp the stationary. Improving quality and durability of bitumen and asphalt. Physical performances of asphalt binders such as penetration, softening point, ductility, and viscosity were tested according to the following standards. Melt the bitumen to be tested to a temperature of 75 to c above. Introduction viscosity grading system has been adopted by india recently. Physical performances of asphalt binders such as penetration, softening point, ductility, and viscosity.
Vonk et al 11, suggested that bitumens homogeneity is a condition for good ductility, and the lower the asphaltene content, the better ductility. Dimension of the briquette thus formed is exactly 1 cm square. The ductility of bitumen is expressed as the distance in centimeters to which a basic briquette can be elongated before the thread formed breaks under stated conditions. 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. Standard test method for ductility of bituminous materials. Ductility is when a solid material stretches under tensile stress. A number in parentheses indicates the year of last reapproval. Bitumen, penetration grade, quality control, statistics, viscosity grade. 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 a. The ductility test is used to describe the ductile and tensile behavior of bituminous binders. The ductility can be described as the distance of elongation to which a bitumen material that is pulled will elongate before breaking.
Different types of bitumen, their properties and uses. The ductility of bituminous material is the distance in centimeters to which it will elongate before breaking when a briquette specimen of the materials. Let the mold containing the material cool to room temperature place the brass plate and mold, with briquet specimen, in water bath and keep at the specified temperature for a period of from 85 to 95 minutes attach the. Presumably this is because the said polymer has significant. A grade of 4050 bitumen means the penetration value is in the range 40 to 50 at standard test conditions. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road. The ends of a molded specimen are pulled apart in a liquidfilled trough at specified speed and temperature.
The binder material that does not possess sufficient ductility would. Ductility tests on bitumen aashto t51astm d1 the property of bitumen which allows it to undergo deformation or elongation is called ductility of bitumen. Performance tests on bitumen and bituminous mixes vincenzo buccino pietro ferrari three levels of interpretation may be identified in this article. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value. First, asphalt test, ductility test on bitumen tester introduction asphalt ductility tester is commonly used petroleum testing equipment. Softening point denotes the temperature at which the bitumen attains a particular degree of softening under the specified condition of test. Ductility testing apparatus, ductility testing equipment. Ductility test is no longer mandatory for specification compliance. If the road surface can stretch a little under heavy loads, it is bound to last for a while without repairs. The ductility of the adhesive layer in shear is the key property affecting the joint strength.
This serves as satisfactory binders in improving the physical interlocking the aggregates. Several agencies have specified minimum ductility values for various types of bitumen pavements. 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 test, which is normally performed at ambient temperature, is believed to reflect the homogeneity of the binder and its ability to flow. Importance of ductility ductility test of bitumen is. Includes all amendments and changes through reapproval notice, 2018. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is. Bitumen is binder of pavement construction, which binds from ductility thin films around the aggregates. Methods of limit analysis provide a uniform basis for ultimate limit state design of concrete structures. Determining the ductility of bitumen civil engineering. Exp 11 ductility test on asphalt civil engineers pk. Clipping is a handy way to collect important slides you want to go back to later.
To determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. Tests applied on bitumen procedure of tests on asphalt. Ductility tester ductility test apparatus for bitumen. Pdf critical problems with using the asphalt ductility test as a. Faculty of civil engineering pavement laboratory ductility test introduction. Ductility is the property of bitumen that permits it to undergo great deformation or elongation. Jun 17, 2016 the ductility test gives a measure of adhesive property of bitumen and its ability to stretch. Penetration test ductility test viscosity test softening point test flash and fire point test float test solubility test specific gravity test spot test water content loss on heating test 2 3. Determine ductility of bitumen and its suitability for.
Roads expand at daytime while they contract at night. Protect the sample from dust and allow it to cool in atmosphere at a temperature between 15 to 30 0c for 112 to 2hours for 45mm deep container and 1 to 112 hours for 35mm deep container. Determine ductility of bitumen and its suitability for road. 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 of bitumen is measured by the distance in cm centimeter, to which the bitumen sample will elongate before breaking when it is pulled by standard specimen at specified speed. Learn about ductility testing and the material testing solutions we provide for ductility testing. Empirical rheological tests carried out on unmodified and modified bitumen with. Download citation a study on the significance of the ductility test for bitumen an analysis of the primary factors governing the ductility of bitumens, as determined by the wellknown test, is. This test is done to determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. A study on the significance of the ductility test for bitumen. It is generally considered that an asphalt with a very low ductility will have poor adhesive properties and. While sufficient ductility of all structural components is necessary limit analysis does not address the question of required and provided. Astm d5 astm d, 1992, astm d36 standard a, 2009, astm d1 statements b, 2008, and astm d4402 astm d, 2006, respectively. The following tests are usually conducted to evaluate different properties of bituminous materials. Determining the ductility of bitumen linkedin slideshare. Determining the distance of elongation for a bitumen material before breaking at a specific speed and specific temperature. Determine ductility of bitumen and its suitability for road construction. In flexible pavement design, it is necessary that binder should form a thin ductile film around.
Note 2the precision statement for ductility, as presented in fig. However a ductility of 100 cms is specified generally for bituminous construction. 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. Pdf the research investigates the properties of bitumen modified with used. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article. To perform ductility test on bitumen civil engineering. Pdf ductility of concrete structures viktor sigrist. Ductility machines are used to determine the ductility of formed asphalt cement or semisolid bitumen by measuring the distance of elongation before reaching the breaking point of a briquet sample, which is pulled apart at a speci. Malleability, a similar property, is a materials ability to deform under pressure compressive stress. Critical problems with using the asphalt ductility test as a performance index for modified binders.
May 12, 20 objective for determination of ductility of distillation residue a given bitumen. Sep 11, 2015 a minimum ductility value of 75 cm has been specified by the bis. The specification of bitumen also shows variation with the safety, solubility, physical properties, and the durability. In addition, ductility offsets the effect of shear and peel stress peaks. Ductility is defined as distance in cms to which a standard briquette of bitumen can be stretched before the thread breaks. The ductility can be described as the distance of elongation to which a bitumen. Ductility of bitumen at a temperature of 25 c drops sharply when recycled polyethylene is introduced.
Standard test method for ductility of asphalt materials. An analysis of the primary factors governing the ductility of bitumens, as determined by the well. 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 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. Ductility simple english wikipedia, the free encyclopedia. Pdf critical problems with using the asphalt ductility. If malleable, a material may be flattened by hammering or rolling. The ductility test is measure of cohesiveness and elasticity of the bitumen. Tensile strength and ductility of specimens can be measured concurrently with the addition of the force ductility kits.
Dec 08, 2016 determination of ductility of bitumen december 8, 2016 shanmukha leave a comment 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 machines are used to determine the ductility of formed asphaltcement or semisolid bitumen by measuring the distance of elongation before reaching the breaking point of a briquet sample, which is pulled apart at a speci. Both of these properties are aspects of plasticity. Theory of ductility test on bitumen the ductility test gives a measure of adhesive property of bitumen and its ability to stretch. 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. Complete document standard method of test for ductility of asphalt materials. If ductile, a material may be stretched into a wire. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. Ductility test of bitumen is one of the main testes that you need to do during road construction.
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 bitumen sample is heated and poured in the molds assembly placed on a plate. The h1068 ductility machines meet astm d1, d6084 and. Introduction applications ductility machines are used to determine the ductility of formed asphalt cement or semisolid bitumen by measuring the distance of elongation before reaching the breaking point of a briquet sample, which is pulled apart at a speci.
Ductility is defined as the distance in cm, to which a standard sample or briquette of the material will be elongated without breaking. To obtain the ductility value of bituminous sample. Ductility test apparatus conducts ductility tests of bituminous materials to measure the elongation of a binder specimen before failure. 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 ductility of a bituminous material is measured by the distance in cm to which it will elongate before breaking when a standard briquette. To perform ductility test on bitumen ductility is the property of bitumen that permits it to undergo great deformation or elongation. 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 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 values ranges from 0 to over 150 depending on the type of bitumen. 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. To understand the performance of the bitumen when it is on service, the design of. The stretched distance in centimeters at breaking is then reported as ductility. The ductility test figure 1 measures asphalt binder ductility by stretching a standardsized briquette of asphalt binder figure 2 to its breaking point. Ductility is a key component of overall weldability since weld cracking is often associated with an exhaustion of available ductility. Standard test method for ductility of bituminous materials1 this standard is issued under the. We know that the ductility of a material is the ability of that material to undergo plastic deformation permanent deformation. D 186related theory ductility test on asphalt, ductility.
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