Ductility tester ductility test apparatus for bitumen. Bitumenasphalt testing equipment ductility testing. It is expressed as the distance in centimeters to which a standard briquette of bitumen can be stretched before the thread breaks. The ductility test has been performed to determine the elongation length of bitumen at a specific temperature. The penetration test is carried out to classify bitumens into different grades. Bitumen ductility test asphalt ductility test ductility. Solubility test measures the bitumen content of a bituminous material by means of its solubility in carbon disulfide or to detect contamination in asphalt cement ductility test measures the distance a standard asphalt sample will stretch without breaking under a standard testing condition 5 cmmin at 25c measure of adhesive.
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 hot ductility test is used to evaluate the susceptibility of an alloy to cracking at elevated temperatures, such as haz liquation cracking 54. Clipping is a handy way to collect important slides you want to go back to later. 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 apart at a specified speed and a specified temperature. The optimum level of nrgps content to the bitumen emulsion, and the effect of amphoteric surfactant and acidification during charge conversion of the modified latex on ductility properties were determined. The ductility test astm d1 measures the distance a standard asphalt.
Determination of the tensile properties of modified bitumen by the force ductility method. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article. The suggested method of test is covered by astm d1 and aashto t51. The test helps in determining the consistency of bitumen and done using ring and ball test.
Ductile bitumen forms a thin ductile film around aggregate does not crack under lower temperature. Bitumen asphalt cement to check quality and properties for pavement mascarina, dianalyn a. Despite the adaptation of advanced binder rheology characterization methods by many agencies, the asphalt ductility test is still being used in some. 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. Determine ductility of bitumen and its suitability for road construction. If the bitumen has low ductility value, the bituminous pavement may crack, especially is cold. This is because of the temperature changes in the bituminous mixes and the repeated deformations that occur in flexible, pavements due to the traffic loads. Pdf application of waste plastic in modifying bitumen. Download fulltext pdf download fulltext pdf download fulltext pdf download fulltext pdf read fulltext. Standard ductilometer for ductility test ductimeter controls group. The ductility test of bitumen is carried out in a standard ductility test apparatus called 8 shaped briquette. 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.
It is conducted as per is code 1208 the bitumen elongation will be measured in cm or mm, and the ductility test is performed at 27c at the rate of pulling 50mm per minute. Procedure of ductility test on bitumen melt the bituminous test material completely at a temperature of 75c to 100 c above the approximate softening point until. The test is conducted at 27c and at a rate of pull of 50mm per minute. The flexible pavement construction at where the bitumen binders are used, it is of. Ensure that the area to be tested is dry and free from loose materials. The ductility of bitumen may vary from 5 to over 100 for different bitumen grades, but for satisfactory performance it should not be less than 50 cm. Grade and properties of bitumen softening point test. Ductility test this test measure the adhesive properly of bitumen and its ability to stretch. Tests applied on bitumen tests on asphalt bitumen emulsion. Analysis of available data for validation of bitumen tests bitval. Bitumen ductility is expressed as the distance in centimeters by which a standard bitumen briquette can be stretched before the line breaks, this test should be performed at 27 oc and traction should be applied at a rate of 50 mm per minute. The ductility test is measure of cohesiveness and elasticity of the bitumen.
Ductility tests on bitumen aashto t51astm d1 the property of bitumen which allows it to undergo deformation or elongation is called ductility of bitumen. This standard is issued under the fixed designation d 1. Ductility test for finding ductility value of the bituminous. Bituminous materials and mixtures description free. The hotductility test has been used to evaluate the liquation cracking. In the absence of any specified variations in the test method, the test procedure as. Bitumen tests bitumen is a complex material with a complex response to stress. Ductility is defined as the distance in cm, to which a standard sample or briquette of the material will be elongated without breaking. In bs uk literature, the ranges start from 15 hardest bitumen to 450 units softest bitumen. Apr 09, 2017 the ductility provides the extent of adhesive nature or the properties possessed of bitumen and its capacity to stretch. Asphalt cements superpave binder tests superpave binder.
Ductility test of bitumen 22 jan 2018 1 apr 2018 aim. To obtain the ductility value of bituminous sample. Tests of bituminous materials to detect its suitability. This grading applied to original bitumen samples called ac grades, or aged residue samples called ar grades. Ductility test is no longer mandatory for specification compliance. The ductility test of bitumen is carried out in two steps. Melt the bitumen to be tested to a temperature of 75 to c above its approximate softening point till it becomes fluid. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value. To determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. Penetration test of bitumen step by step procedure and. Nado rinchen dhendup tashi pemba tshering rigesh lama rohit adhikari objective. Unless otherwise specified, the test shall be made at a temperature of 25 0.
Ductility is a key component of overall weldability since weld cracking is often associated with an exhaustion of available ductility. The carriage return is automatic so manual intervention is not. Ductile material is one that elongates when in tension. When a lowtemperature ductility test is desired, the test should be run at a temperature of 39. Dimension of the briquette thus formed is exactly 1 cm square. Solubility test measures the bitumen content of a bituminous material by means of its solubility in carbon disulfide or to detect contamination in asphalt cement ductility test measures the distance a standard asphalt sample will stretch without breaking under a standard testing condition 5. A detailed analysis of the engineering properties such as penetration test, ductility test, viscosity test, softening point test and specific gravity test are conducted on both conventional and modified bitumen samples for various percentages of replacements such as 0, 10, 20 and 30% respectively. The ductility test is a measure of the distance to which a bituminous material will elongate before breaking when two ends of a standard specimen are pulled apart at a uniform rate. The ductility test is used to describe the ductile and tensile behavior of. The bitumen sample is melted to a temperature of 75 to 100 c above the approximate. In this step, the bitumen sample taken in the mould is tested for its ductility in the ductility testing machine. Bitumen is binder of pavement construction, which binds from ductility thin films around the aggregates. Ductility test on bitumen measures the distance in centimeters ductility test of bitumen is. Sowards, in comprehensive materials processing, 2014 6.
Astm d1 17 standard test method for ductility of asphalt. The penetration test result showed that addition of fly ash and shredded rubber up to 7 % decreases the value grade but the overall grade of the bitumen remained same, which was 6070. Tensile strength and ductility of specimens can be measured concurrently with the addition of the force ductility kits. To measure the ductility of a given bitumen sample. The consistency of bitumen materials varies depending upon several. Note 2the precision statement for ductility, as presented in fig. The distance in centimeters gives the value of the ductility of bitumen. In order to determine the ductility of bitumen, the sample is cast. 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 apart at a specified speed and a specified.
Ductility of bitumen is influenced by the dimensions of briquette, test temperature and rate of pulling. To determine the suitability of bitumen for its use 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 material is pulled. Pdf critical problems with using the asphalt ductility test. The lower the number of poise, the lower the viscosity, and thus, the more easily a substance flows. Tests of bituminous materials to detect its suitability as a. Source of paving bitumen and penetration grade min ductility va. Determine ductility of bitumen and its suitability for road. Softening point test indicates the point at which bitumen attains a particular degree of softening under standard test conditions. Apparatus required, theory, procedure, precautions. Asphalt testing laboratory manual qatar university. 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.
Applications of ductility test a certain minimum ductility is necessary for a bitumen binder. Standard test method for ductility of bituminous materials. In this article we will discuss full procedure for the ductility test of bitumen. It is also defined by an empirical test method as the distance in cm to which a standard sample.
Ductility is the property of bitumen that permits it to undergo great deformation or elongation. Ductility test of bitumen step by step full procedure with apparatus. Defination the ductility of bituminous material is the distance in centimetres to which. Combining the results of the force ductility test, penetration test and. 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. Sep 20, 2017 penetration test the penetration test determines the hardness or softness of bitumen. Pdf significance of tests for asphalt haneen ahmed. Ductility test of bitumen is one of the main testes that you need to do during road construction. Top 9 test on bitumen for pavement construction with step. Pdf despite the adaptation of advanced binder rheology characterization methods by many agencies, the asphalt ductility test is still under. The ductility can be described as the distance of elongation to which a bitumen material that is.
There is no known equivalent standardised method for the force ductility test. The ductility value is the measure of adhesiveness and elasticity bitumen. The penetration test is one of the oldest and most commonly used. The ductility is expressed as the distance in centimeters to which standard briquette of bitumen may be stretched before the thread breaks. After compaction, remove the base plate and let the sample be free. Critical problems with using the asphalt ductility test as a. 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. Dimension of the briquette thus formed is exactly 1 cm. The instrument for measuring the hardness of bitumen. Empirical rheological tests carried out on unmodified and modified bitumen with different. Determine ductility of bitumen and its suitability for.
In this step, the bitumen sample is filled in the briquette mould after melting it. Ductility is a measure of the elasticity or adhesiveness of bitumen. Ductility of bitumen is its property to elongate under traffic load without getting cracked in road construction works. Apparatus required, theory, procedure, precautions, observations, reporting and recommended values of bitumen ductility is discussed in this article the ductility test gives a measure of adhesive property of bitumen and its ability to stretch. 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. After stressfree cooling of the asphalt to the testing temperature, the tensile. The ar viscosity test is based on the viscosity of aged residue from the rolling thin film oven test.
It is generally considered that an asphalt with a very low ductility will have poor adhesive properties and. Penetration or ductility cant in any case replace each other. Bitumen tests ductility test ductility is the property of bitumen that permits it to undergo great deformation or elongation. Ductility test of bitumen apparatus, procedure, result. This test is done to determine the ductility of distillation residue of cutback bitumen, blown type bitumen and other bituminous products as per is. Pdf development of bitumen properties with admixture. Ductility is the property of bitumen that permits it to undergo deformation or elongation without cracking or breaking. Ductility test of bitumen step by step full procedure. The ends of a molded specimen are pulled apart in a liquidfilled trough at specified speed and temperature. Ductility test of bitumen step by step full procedure with. The flexible pavement construction at where the bitumen binders are used, it. The minimum width of the crosssection of the mold must be 10 mm x 10 mm.
Defination the ductility of bituminous material is. Since there is no definitive mechanism to describe haz liquation cracking in nibase alloys, the hot ductility test is useful for determining the. Pdf critical problems with using the asphalt ductility test as a. Top 9 test on bitumen for pavement construction with step by step. It is generally considered that an asphalt with a very low ductility will have poor adhesive properties and thus poor performance in service. Determining the ductility of bitumen civil engineering. Different tests on bitumen and their necessity civil planets. The test is carried out in a standard ductility test apparatus. The ductility test is a measure of the distance to which a bituminous material will elongate. Ductility test of bitumen three different methods of. Ductility test apparatus conducts ductility tests of bituminous materials to measure the elongation of a binder specimen before failure. Ductility test ductility is the property of bitumen that permits it to undergo great deformation or elongation.
573 1222 73 1066 1199 1698 313 1387 1660 1651 694 1344 923 1285 1433 803 1143 1416 784 24 1667 1028 131 1186 309 958 169 1090 130 503