Scribd is the worlds largest social reading and publishing site. Lit the test flame and adjust it to a diameter of 3. The key difference between flash point and fire point is that the flash point describes the lowest temperature at which the ignition of a substance initiates whereas the fire point describes the lowest temperature at which the fuel continues to burn for a. A typical flash point test involves heating a small sample of asphalt binder in a test cup. The flash point typically 225 degrees c or 440 degrees f for mineral oils is an indication of the safety hazards of a lubricant with respect to fire and explosion. The fire point of a fuel is the lowest temperature at which the vapour of that fuel will continue to burn for at least 5 seconds after ignition by an open flame of standard dimension. C observed flash or fire point, or both, to the nearest 2 c, and. Gd3536d flash and fire point of bitumen tester is a kind of fullyautomatic instrument wich can do determination for both flash point and fire point. And these volatiles catches fire which is very hazardous and therefore it is essential to qualify this temperature for each bitumen grade.
Consists of electric heater with rheostat, flash point platform with thermometer holder, test burner and flash cup. This determining flash and fire point of bitumen article should make this clear mike. The principal purpose of flash point testing is to determine maximum safe mixing and applying temperatures. In recent years, the flash point test results have been related to the hardening potential of asphalt. The test is performed by heating an asphalt sample in an open cup at a specified rate and determining the temperah1re at which a small flame passing over the. Utilizes a 1250w10 amp, nickelchromium heater with stepless variable control for accurate, repeatable, rateofrise temperature settings per specifications. Flash point and fire point tests of bitumen free download as pdf file. And comparing to the recommended values is that the minimum value of flash point is 175oc for all grades of bitumen. Fire and flash point free download as powerpoint presentation. D92 test method for flash and fire points by cleveland open cup tester. Definition the stripping value of aggregates is determined as the ratio of the uncovered area observed visually to the total area of aggregates, expressed as a percentage. When the sample temperature is approximately 56 c below the anticipated flash point.
Bitumen tests flash and fire point test at high temperatures depending upon the grades of bitumen, materials leave out volatiles. Flash point values are a function of the apparatus design, the condition of the apparatus used, and the operational procedure carried out. Standard test method for flash and fire points by cleveland. Significance of flash fire points flash and fire points in heat transfer fluids. Flash point and fire point test of bitumen we civil. Sep 07, 2017 flash and fire point test of bitumen m s p k gyan. Record the temperature at this point which is the fire point of the oil under test. Flash point and fire point test of bitumen cement concrete.
Standard test method for softening point of bitumen ringand. Flash point of bitumen is the temperature at which, its vapour will ignite temporarily during heating when a small flame is brought into contact with the vapour. This test is done to determine the flash point and the fire point of asphaltic bitumen and fluxed native asphalt, cutback bitumen and blown type bitumen as per is. Flash and fire point tests on bitumen flash point of bitumen is defined as the point of lowest temperature at which bitumen catches vapors of test flame and fires in the form of flash. Used to determine flash and fire points by the cleveland opencup method. The flash point is the lowest liquid temperature at which application of the test flame causes the vapors of the sample to ignite. Astm d 9205a test method for flash and fire points by. Fire point of bitumen is defined as the point of lowest temperature at which the bitumen ignites and burns at least for 5 second under specific conditions of test. D4177 practice for automatic sampling of petroleum and petroleum.
At higher temperatures bituminous materials leave out volatiles. Gd3536d flash and fire point of bitumen tester adopts technology of single chip microcomputer and lcd screen. Apparatus heat resistant glass beaker of 500 ml capacity. At the flash point, a lower temperature, a substance will ignite briefly, but vapor might not be produced at a rate to sustain the fire. Flash point and fire point test of bitumen we civil engineers.
Tabulate the readings and declare the temperature as flash point and fire poin t of the oil under test. Flash and fire point measurement the flash point test can be summarized as a procedure in which a test specimen is introduced into a temperaturecontrolled test cup and an ignition source is applied to the vapors produced by the test specimen. Bitumen bound materials softening point test highway ii bitumen bound materials 24 significance bitumen does not melt, but change gradually from solid to liquid softening point is the temperature at which the bitumen attains particular degree of softening under specified test conditions ring and ball apparatus is used for the test. The flash point of a material is the lowest temperature at which the application of test flame causes the vapours from the material momentarily catch fire in the form of a flash under specified conditions of test. Both terms flash point and fire point are used to describe liquids. What is the difference between flash point and fire point. D93 test methods for flash point by penskymartens closed cup tester. In general, flash point is the lowest temperature of the test. Observe and record the barometric pressure at the time of the test.
Flash and fire point test free download as word doc. Flash and fire point test on bitumen the constructor. The flash point and the slightly higher fire point are covered by astm d92 and d93. Flash and fire points by cleveland open cup tester this test method describes the determination of the flash point and fire point of petroleum products by. Flash point the flash point of a material is the lowest temperature at which the application of test flame causes the vapours from the material to momentarily catch fire in the form of a flash under specified conditions of the test. Read a detailed procedure of bitumen penetration test with sample data. D4057 practice for manual sampling of petroleum and petroleum products. Sources of bitumen i naturally occurring the refined lake asphalt typically contains 55. A small test flame passing over the surface of the liquid causes the vapor to ignite at the flash point. Experimental procedure, observations and result flash and fire point test is a safety test conducted on a bituminous material so that it gives an indication of the critical temperature at and above where precautions should be taken to eliminate fire. Utilizes a 1250w10 amp, nickelchromium heater with stepless variable control for accurate, repeatable, rate of rise temperature settings per specifications. This point is best judged by using a strong source of light and determining the point where the tip of the needle just meets its image reflected by.
Dec 06, 2016 the flash point test can be summarized as a procedure in which a test specimen is introduced into a temperaturecontrolled test cup and an ignition source is applied to the vapors produced by the test specimen. Fire point the fire point is the lowest temperature at which the application of test flame causes the material to ignite and burn at least for 5 seconds under specified conditions of the test. Bitumen is the most popular binding material in road construction. Mar 17, 2019 bis defined the flashpoint as the temperature at which the vapour of bitumen momentarily catches fire in the form of flash under specified test conditions. The stirring is discontinued during the application of the test flame. An asphalt with a high flash point is more likely to have a lower hardening potential in the field. Cleveland flash and burning point apparatus standard. Note 1the precisions for fire point were not determined in the current interlaboratory program. The flash and fire points of a liquid fuel specimen are the indicators of its flammability. List of tests for bitumen as per indian standard civil. Mar 30, 2018 fire point the fire point is the lowest temperature at which the application of test flame causes the material to ignite and burn at least for 5 seconds under specified conditions of the test.
Nowadays due to rapid infrastructure growth and increasing in the number of vehicle. The supported apparatus for carrying out flash and fire point tests on bitumens and asphalts is the cleveland open cup test method astm d92. Flash and fire point test is conducted on bitumen to know the safe mixing and application temperature values of particular bitumen grade. What is the significance of flash point and fire point. The knowledge of this point is of interest mainly to the user, since the bitumen must not be heated to this point. Conclusion from the laboratory test we did on the bitumen in flash and fire point, the result we obtained is, flash temperature is 256oc, and the fire point temperature is 270oc. To understand the difference between flash point and fire point, we must first understand the context in which those terms are used. The fire point is defined as the lowest temperature under specified test conditions at which the bituminous material gets ignited and burns. D93test methods for flash point by penskymartens closed cup tester d 140 practice for sampling bituminous materials d 10 test method for flash point and fire points of liquids by tag opencup apparatus d 4057 practice for manual sampling of petroleum and petroleum products d 4177 practice for automatic sampling of petroleum and petroleum. Flash and fire point test thermodynamics branches of. Sep 30, 2019 flash point of bitumen is the temperature at which, its vapour will ignite temporarily during heating when a small flame is brought into contact with the vapour. These tests are very important it can show the ability of asphalt to resist high temperatures. Stir it thoroughly to remove air bubbles and water. The temperature of the sample is increased and at specified intervals a test flame is passed across the cup.
Determining flash and fire point of bitumen civil engineering portal. The flash point of a material is the lowest temperature at which the application of test flame causes the vapours from the. D 92 test method for flash and fire points by cleveland open cup3 d 140 practice for sampling bituminous materials4 d 3461 test method for softening point of asphalt and pitch mettler cupandball method5 e 1 speci. To determine the flash point and the fire point of asphaltic bitumen and fluxed native asphalt, cutback bitumen and blown type bitumen as per is. Standard test method for softening point of bitumen ring. 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. Difference between flash point and fire point compare the. Destroy any air bubbles on the surface of the sample. Standard test method for flash point of cutback asphalt with.
Cleveland flash and fire point tester humboldt mfg. When the pressure differs from 760 mm hg, correct the flash or fire point, or both, by means of the following equations. Apply heat initially so that the rate of temperature rise of the sample is 14 to 17 c per minute. Flash and fire point test is conducted on bitumen to know the safe mixing and application temperature values. Flash point tests the flash point of a bitumen that contains a volatile distillate is the temperature at which it begins to give off ignitable vapor. The flash point of a material is the lowest temperature at which the application of test flame causes the vapours from the material momentarily. In this report we will deal with to test the first is ductility test, and the second is the flash point and fire point of asphalt. D3666 specification for minimum requirements for agencies testing and inspecting road and paving materials. At high temperatures depending upon the grades of bitumen, materials leave out volatiles. Flash point test the flash point test determines the temperature to which an asphalt can be safely heated in the presence of an open flame. The flash point test determines the temperature to which an asphalt can be safely heated in the presence of an open flame. Flash and fire point test astm d92 seperti layang layang.
Dec 22, 2017 flash and fire points by cleveland open cup tester this test method describes the determination of the flash point and fire point of petroleum products by a manual cleveland open cup apparatus or. D10 test method for flash point and fire point of liquids by tag opencup apparatus. The fire point determined and continue heating so the sample temperature increased at a rate of 9. Tests applied on bitumen procedure of tests on asphalt. The test flame is applied at intervals depending upon the expected flash and fire points. First application is made at least 17 0 c below the actual flash point and then at every 1 0 c to 3 0 c. Apr 30, 2011 the key difference between flash point and fire point is that the flash point describes the lowest temperature at which the ignition of a substance initiates whereas the fire point describes the lowest temperature at which the fuel continues to burn for a short time period after the initiation of the ignition. The test can be continued up to the fire point the point at which the test flame causes the sample to ignite and remain burning for at least 5 seconds. Standard test method for flash point of cutback asphalt. Difference between flash point and fire point compare. The test flame produces at least five continuous seconds of ignition at the fire point. Feb 04, 2012 the observed flash point the temperature read on the thermometer when a flash appears at any point on the surface of the bluish halo that sometimes surrounds the test flame recorded. Flash point and fire point tests of bitumen building engineering. The observed flash point the temperature read on the thermometer when a flash appears at any point on the surface of the bluish halo that sometimes surrounds the test flame recorded.
The flash point tells the critical temperature at and above which suitable precautions are required to be taken to. Flash and fire points by cleveland open cup tester this test method describes the determination of the flash point and fire point of petroleum. Various lab tests on bitumen for pavement construction. Flash point and fire point tests of bitumen leave a comment lab reports september 30, 2019 october 3, 2019 flash point of bitumen is the temperature at which, its vapour will ignite temporarily during heating when a small flame is brought into contact with the vapour. When the flash point test is used to detect contaminating materials, the penskymartens closed tester method astm d93, which tends to give more indicative results, is normally used.
469 1572 215 964 176 1382 924 835 148 1577 1370 1136 1370 413 562 1111 637 543 1354 1034 1483 460 1568 593 376 911 1047 264 638 66 1089 1353 989 1208 179 39 1262 1210 920