Asphalt Binders (Exam 2) Questions With Correct Answers 2026

ASPHALT BINDERS (EXAM 2) QUESTIONS
WITH CORRECT ANSWERS 2026

What is asphalt? - CORRECT ANSWER -generally a by-
product of petroleum distillation; a complex hydrocarbon; soluble in petroleum products; can b
e naturally-occuring



What is tar? - CORRECT ANSWER -generally a by-
product of coal production; resistant to petroleum products



How can a source of asphalt be identified? - CORRECT ANSWER -by solubility tests



Where was asphalt obtained from originally? - CORRECT ANSWER -
Island of Trinidad and Venezuela; lakes



What are petroleum-based asphalts? - CORRECT ANSWER -a waste product from refinery-
processing of crude oil; "bottom of the barrel"; properties depend on refinery operations and c
omposition depends on crude source



What are the three bituminous material types? - CORRECT ANSWER -
1. asphalt cement/hot mix asphalt

2. emulsified asphalt

3. cutback asphalt



What are emulsified asphalts composed of? - CORRECT ANSWER -
asphalt cement, water, and an emulsifying agent



What are cutback asphalts composed of? - CORRECT ANSWER -
asphalt cement with petroleum solvent

, What are the basic steps of refinery operation? - CORRECT ANSWER -1. pumping
X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2




2. storage

3. heating

4. distillation

5. condensing and cooling X2 X2




6. separation



What are the three components of asphalt? - CORRECT ANSWER -asphaltenes, resins, and oils
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What do emulsifiers do? - CORRECT ANSWER -
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give surface charge to asphalt droplets suspended in water medium; anionic (limestone compa ti
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ble) or cationic (siliceous gravel compatible); allow for bitumen to be mixed at lower tempera tur
X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2




es; cheaper, safer, and better for the environment compared to cutbacks.
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What are three cutbacks? - CORRECT ANSWER -
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1. Rapid Cure (RC); high volatility of solvent; tack coats and surface treatments
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2. Medium Cure (MC); moderate volatility; stockpile patching mix
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3. Slow Cure (SC); low volatility; prime coat and dust control
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good for fast projects, but not used because it's harmful for the environment
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What were the early specification for lake asphalts and for petroleum asphalts? -
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CORRECT ANSWER -lake asphalts:
X2 X2 X2 X2




-appearance

-

solubility in carbon disulfide petroleum X2 X2 X2 X2 X2




asphalts:

-consistency