Objectives for rp15 the objectives of the project are. Lecture 5b grading of bituminous materials quality control. For instruments that offer automation, the results of a 3min integration shall be acceptable. D92 test method for flash and fire points by cleveland open cup tester. Kinematic viscosity of asphalts bitumen astm d2170 eniso 12595 cooling fluid can be pumped through the cooling coil inside the apparatus. The results are very sensitive to test conditions and bitumen specimen preparation and the requirements of the appropriate standard must be rigidly adhered to. In this experiment, we aim to determine the viscosity of bitumen. The committee responsible for this standard is na 0620332 ga gemeinschaftsausschuss. Viscosity grade of bitumen orinoco oil corporation, s. Viscosity is one of the most important parameter to describe the flow behavior of the binder. At high fluidity or low viscosity, bitumen binder simply lubricates the aggregate particles instead of providing an uniform film thickness for binding action.
Asphalt is also known as bitumen, is a sticky, black and highly viscous liquid or semisolid form of. 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. Viscosity grade bitumen is specified by astm standard d338109 and aashto m22680 2008. Viscosity grade bitumen, bitumen vg 20, vg 30, vg 40. There are several ways to determine the specific gravity of asphalt on all these methods, is archimedes law. If viscosity of bitumen is higher, compactive effort of bitumen reduces and heterogeneous mixture arises. D341 practice for viscositytemperature charts for liquid petroleum products. Assessing low shear viscosity as the new bitumen softening.
In other words, the reduction of heavyoil or bitumen viscosity should be achieved in a quick and economic way. Known as vg bitumen, this product is highly recommended for roads constructions and pavements in summer. Kinematic viscosity as a function of temperature for paving grade bitumen. 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. 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. Assessing low shear viscosity as the new bitumen softening point test s. Based on absolute or kinematic viscosity requirement, the bitumen viscosity can be measured by a variety of devices. The absolute viscosity test measures the viscosity in units of poise. At the application temperature, this characteristic greatly influences the strength of resulting paving mixes. A basic introduction to rheology technology networks.
Viscosity grade of bitumen are categorized according to viscosity degree of fluidity grading. 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. Viscosity of bituminous materials measurements and factors. The distance, at which the bitumen thread of each specimen breaks, is recorded in cm to report as ductility value. That is it influences the fluid property of bitumen. A basic introduction to rheology rheology and viscosity introduction rheometry refers to the experimental technique used to determine the rheological properties of materials. To determine the bitumen resisting for penetration. The viscosity at 60 c represents the viscosity of the asphalt at the maximum temperature a pavement is likely to experience in most parts of the u. Tap water or a combination with the external tamson. Low or high viscosity during compaction or mixing has been observed to result in lower stability values. Standard test method for viscosity determination of. The higher the viscosity of the bitumen more time will be required for a quantity to flow out.
Standard test method for kinematic viscosity of asphalts. The results were then related to the changes in the rheological properties of polymer modified bitumen. Vg bitumen specifications cover by viscosity at 60. 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. Modified asphalt binders or asphalt binders that have been conditioned or recovered are typically nonnewtonian under the conditions of this test. Viscosity is the property of bitumen which influences the ability of bitumen to spread, penetrate into the voids and also coat the aggregates. It may be necessary to apply a form factor to yield the actual dynamic viscosity at the test temperature. Release the needle for five seconds and measure the distance penetrated. The specifications kept for measurement is the absolute viscosity at 60 degree celsius and a kinematic viscosity at 5 degree celsius. Rheological properties of polyethylene and polypropylene.
Tests applied on bitumen procedure of tests on asphalt. Viscosity grade bitumen asphalt is a standard grade bitumen usually used as a paving. Emulsion basics midwestern pavement preservation partnership adam redman heritage research group. Saybolt furol viscosity test is used to determine viscosity of liquid bitumens. Standard test method for viscosity of asphalts by vacuum. Overall, the result clearly shows that the addition of wco reduces the. To improve the efficiency of steam applications, a better understanding of the. The astm d, ip, iso, and aashtot test methods cover procedures for the determination of viscosity of asphalt binder bitumen by. 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. Application in engineering viscosity test and many other bitumen tests are done to ensure the quality of bitumen. The torque value is then changed using calibration factors to yield the viscosity of the bitumen. Bitumen is very important component of many construction sites like roads, highways. Experience in using bitumen in engineering projects has led to the adoption of certain test procedures that are indicative of the characteristics that identify adequate performance levels. Viscosity denotes the fluid property of the bituminous material and it is a measure of resistance to flow.
Pdf engineering properties of bitumen modified with biooil. Viscosity test for cutback bitumen the constructor. Viscosity of asphalts by vacuum capillary viscometer. In this test, time in seconds is noted for 60 ml of the liquid bitumen at specified temperature to flow through an orifice of a specific size. To classify the bitumen as per the viscosity grade following bitumen characteristics tests are carried out as per the is. Bitumen properties the bitumen sample from athabasca has api gravitiy of around 8. Design pumpability, mixability and sprayability 27 to pump bitumen, higher temperature and lower viscosity are optimal. Viscosity reduction of heavy oilbitumen using micro and. Exp 8 penetration test of bitumen civil engineers pk.
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