Asphalt Questions with Detailed Verified Answers for Accuracy

Asphalt Questions with Detailed
Verified Answers for Accuracy
Difference between Asphalt and Tar

✓✓ Asphalt is soluble in petroleum, tar is not.

Asphalt has bitumens, tar has low bitumens


Two Different Distillation Process to Produce Asphalt

✓✓ 1. Fractional Distillation: Crude oil is heated, lighter oils
vaporize and are drawn off, leaving behind asphalt cement



2. Destructive Distillation: crude oil heated under pressure to
higher temperatures than fractional distillation


Penetration test

✓✓ -Test hardness and consistency


Viscosity test

✓✓ Tests resistance to flow


Superpave binder



pg. 1

, ✓✓ Another name for asphalt


Asphalt is selected based on...

✓✓ 1. Climate

2. Traffic

3. Location


Flash Point Test

✓✓ -Asphalt cements are heated before use in construction

-Must understand what the max temp the material can be
heated to safely

-Flash point = temp at which an instantaneous flash occurs


Thin-film oven test

✓✓ -Used to simulate the aging that takes place during the
production of hot mix and during 1st year of pavement's life


Ductility test

✓✓ Workability


Solubility


pg. 2