The extrapolation was done using an empirical equation for the viscosity of gas free athabasca bitumen presented by khan et al. Can describe the properties of the bitumen using the specifications. The viscosity test measures the viscosity of an asphalt. Viscosity grade of bitumen orinoco oil corporation, s.
Bitumen binder viscosity testing apparatus the viscosity of a binder is a measure of its flow characteristics, and the performance of a bituminous mix is greatly affected by its viscosity. Anton paar offers a variety of solutions for measuring the density, viscosity, deformation and flow behavior of asphalt components and compositions, for digesting asphalt samples for subsequent trace analysis, and determining the softening point, penetration, ductility, tensile properties. There are many tests which are conducted to check the quality of bitumen. Release the needle for five seconds and measure the distance penetrated. Viscosity grade bitumen asphalt is a standard grade bitumen usually used as a paving grade bitumen suitable for road construction and for the production of asphalt pavements with. Test procedure for calculating viscosity from penetration txdot designation. In viscosity grade, viscosity tests are conducted at. Various tests on bitumen to access its properties civil. Standard test method for effect of heat and air on asphaltic. Make at least three determinations at points on the surface of the sample not less. Observation sheet grade of bitumen pouring temperature, c test temperature, c periods of cooling. Viscosity grade bitumen asphalt is a standard grade bitumen usually used. The degrees of fluidity at the application temperature greatly influences the ability of bituminous material to spread, penetrate into voids and also coats the aggregate and hence affect the strength and characteristics of resulting paving mixes. Assessing low shear viscosity as the new bitumen softening.
D92 test method for flash and fire points by cleveland open cup tester. Viscosity grade bitumens have a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures. Procuring test equipment the following testing equipment is needed to measure absolute viscosity of viscosity graded. Can grade a bitumen when provided a list of parameters can choose the bitumen for the particular application knows how the grading systems were developed and knows the direction towards which the future development is going. Lecture 5b grading of bituminous materials quality control. In this experiment, we aim to determine the viscosity of bitumen. Viscosity test for cutback bitumen the constructor. The two factors that define the viscosity of bitumen are. Both the viscosity test and the penetration test measure the consistency of an asphalt at some.
Tests applied on bitumen procedure of tests on asphalt. A few qualification tests like specific gravity, water content, ductility, loss on. Standard test method for viscosity determination of asphalt. D341 practice for viscositytemperature charts for liquid petroleum products. All models are fitted with double windows in front and rear walls. This grading applied to original bitumen samples called ac grades, or aged residue samples called ar grades.
Viscosity of bituminous materials measurements and factors. To determine the bitumen resisting for penetration. It is infered that the bitumen has less mobility at low temperature in original resevoir condition. Viscosity or vg grade is the bitumen based on its viscosity. Assessing low shear viscosity as the new bitumen softening point test s. Under the action of force, the fluid reflects higher resistance when the viscosity is high.
Bitumen viscosity grades test bis method specification vg10 vg20 vg30 vg40 absolute viscosity at 60c, poises 1206 part 2 min. Knows which parameters to test from bitumen in order. Standard test method for kinematic viscosity of asphalts. The equipment is used for kinematic viscosity measurement. Introduction to viscosity and rheology of bituminous materials the resistance of a liquid in flowing is defined as the viscosity of that fluid. Standard test method for viscosity determination of. The distance, at which the bitumen thread of each specimen breaks, is recorded in cm to report as ductility value. Viscosity grade of bitumen can be done on original assupplied asphalt binder samples called ac grading or aged residue samples called ar grading. The viscosity expressed in seconds is the time taken by the 50 ml bitumen material to pass through the orifice of a cup, under standard test conditions and specified temperature. Do use a mild heating method to apply heat to the pump packing or casing to free a seized pump. Determination of absolute viscosity test equipment. Both the viscosity test and the penetration test measure the consistency of an asphalt at some specified temperatures and are used to designate grades of asphalts.
Rtfot viscosity grade bitumen argrades, in which the viscosity of bitumen asphalt is measured at 60 c 140 f after the roll on thin film oven test. A basic introduction to rheology rheology and viscosity introduction rheometry refers to the experimental technique used to determine the rheological properties of materials. The whole assembly is heated at a rate of 9 f per min. A basic introduction to rheology technology networks. The lower the number of poise, the lower the viscosity, and thus, the more easily a substance flows. Asphalt or bitumen literally grounds our daily lives in the shape of roads, pavements, runways, and more. D 445 test method for kinematic viscosity of transparent and opaque liquids and the calculation of dynamic viscosity2 d 2161 practice for conversion of kinematic viscosity to. Asphalt is also known as bitumen, is a sticky, black and highly viscous liquid or. C to ease startup do when a pump is to be out of service for even a short period of time, fill it with fuel oil to ensure a trouble free startup. This grading applied to original bitumen samples called ac. Anton paar offers a variety of solutions for measuring the density, viscosity, deformation. In viscosity grade, viscosity tests are conducted at 60 deg. Viscosity grade bitumen, bitumen vg 20, vg 30, vg 40. Tap water or a combination with the external tamson tlc103 or tlc155 cooling circulator scan be used for this purpose.
Typical values would be 240 f for coating grade asphalts, 140 f to 220 f for roofing asphalt and down to 115 f. The viscosity of a binder is a measure of its flow characteristics, and the performance of a bituminous mix is greatly affected by its viscosity. Tar viscometer, cup, valve, receiver, thermometer etc. E77 test method for inspection and verification of thermometers. E11 specification for woven wire test sieve cloth and test sieves. Nov 29, 2017 procuring test equipment the following testing equipment is needed to measure absolute viscosity of viscosity graded paving bitumen is. Viscosity grade bitumen has a thermoplastic feature which causes the material to soften at high temperatures and to harden at lower temperatures. In order to grade the bitumen based on viscosity, bis revised is731992 specifications viscosity at 60c. In viscosity grade viscosity test are conducted at 60 c and 5 c which represents the temperature of road surface during summer and mixing temperature respectively.
Standard test method for effect of heat and air on asphaltic materials thinfilm oven test pren 12595. The ar viscosity test is based on the viscosity of aged residue from the rolling thin film oven test. First, we increase the temperature of the oil bath to 60c. In viscosity grade, viscosity tests are conducted at 60c and 5c, which represents the temperature of road surface during summer and mixing temperature respectively. Viscosity grades bitumen are categorized according to viscosity degree of fluidity grading. D 445 test method for kinematic viscosity of transparent and opaque liquids and the calculation of dynamic viscosity 2 d 2161 practice for conversion of kinematic viscosity to saybolt universal viscosity or to saybolt furol viscosity2 d 2170 test method for kinematic viscosity of asphalts bitumens4 d 4057 practice for manual sampling of. Bitumen is very important component of many construction sites like roads, highways.
Can grade a bitumen when provided a list of parameters can choose the bitumen for the particular application knows how the grading systems were developed and knows the direction. Kinematic viscosity of asphalts bitumen astm d2170 eniso 12595 cooling fluid can be pumped through the cooling coil inside the apparatus. For instruments that offer automation, the results of a 3min integration shall be acceptable. Viscosity grade bitumen asphalt aashto designation. The viscosity of a cutback can be measured with either 4. The following testing equipment is needed to measure absolute viscosity of viscosity graded paving bitumen is. Bitumen properties the bitumen sample from athabasca has api gravitiy of around 8. Astm d2171 d2171m 18 standard test method for viscosity. Viscosity grade bitumen is categorized according to viscosity. C, which represents the temperature of road surface during summer and mixing. The torque value is then changed using calibration factors to yield the viscosity of the bitumen.
Jan 20, 2016 absolute viscosity test of bitumen reference. Standard test method for viscosity of asphalts by vacuum. Modified asphalt binders or asphalt binders that have been conditioned or recovered are typically nonnewtonian under the conditions of this test. Viscosity grade of bitumen are categorized according to viscosity degree of fluidity grading. In this experiment, we aim to determine the viscosity of. In viscosity grade viscosity test are conducted at 60 c and 5 c which represents the temperature of road surface during summer and mixing. 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. E1 specification for astm liquidinglass thermometers. Viscosity is one of the most important parameter to describe the flow behavior of the binder. D4957 test method for apparent viscosity of asphalt emulsion residues and nonnewtonian asphalts by vacuum capillary viscometer. Objectives for rp15 the objectives of the project are.