This will also give a way to compare different binders of bitumen. A temperature at which the grading of bitumen can be carried out. The figure below explains this, where it is observed that bitumen A and Bitumen B have different relationships with temperature.įig.1: Graph representing relationship between temperature and stiffness for different bitumenĭue to these variations, it was necessary to fix a test temperature. The bitumen type varies based on their origin as well as a method of refining. The correlation between the bitumen stiffness and temperature varies with the type of bitumen employed. □ Reading time: 1 minuteThere are different methods of grading of bitumen such as chewing, penetration grading, viscosity grading and superpave performance grading of bitumen which are discussed in this article.
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