Q7: 1. How can we achieve a good stability of asphaltic mixtures? 2. Differentiate between retardation and relaxation time 3. List the components of asphalt cement according to Rostler Sternberg 4. Why Superpave performance grade has been increasingly used to characterize and classify asphalt cement?

Q7: 1. How can we achieve a good stability of asphaltic mixtures? 2. Differentiate between retardation and relaxation time 3. List the components of asphalt cement according to Rostler Sternberg 4. Why Superpave performance grade has been increasingly used to characterize and classify asphalt cement?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter18: Bituminous Materials

Section: Chapter Questions

Problem 12P

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Concept explainers

Asphalt Binders and Mixtures

Asphalt binders are subsidiary products procured during the refining process of petroleum while manufacturing gasoline, diesel, and similar petroleum products. Asphalt binders are obtained from the residue that remains after the distillation of petroleum, this residue is further subjected to steam distillation and oxidation to remove the traces of gas oil present in the residue. Certain additives or modifiers are also added to asphalt binders to alter them to suit different applications.

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Q7:
1. How can we achieve a good stability of asphaltic mixtures?
2. Differentiate between retardation and relaxation time
3. List the components of asphalt cement according to Rostler Sternberg
4. Why Superpave performance grade has been increasingly used to characterize and classify
asphalt cement?

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