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CVEN 342 Exam II questions well answered
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CVEN 342 Exam II questions well answered
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CVEN 342 Exam IIFrom a fatigue perspective, the asphalt cement content should be MAXIMIZED - correct answer ✔✔True
Asphalt cement testing using the DSR for fatigue cracking is done on both aged and unaged asphalt
binder samples - correct answer ✔✔False
Stiffness of asphalt concrete INCREASE with INCREASE frequency of loading - correct answer ✔✔True
Performance grading requirements that the measured properties of asphalt cements meet a specific
MAXIMUM or MINIMUM limit at a specific temperature - correct answer ✔✔True
Aging of asphalt cement INCREASES viscosity - correct answer ✔✔True
The objective of rotational viscometer testing is to determine AC mixing and construction
temperature!!!!! - correct answer ✔✔True
An important aggregate characteristic for use in quality asphalt concrete is - correct answer ✔✔Angular
shape
In the PG binder specification, the main property that controls mixture resistance to thermal cracking
(low temperature cracking) is: - correct answer ✔✔S
One example of a liquid asphalt is - correct answer ✔✔Asphalt Emulsion
An asphalt concrete mixture test is used to estimate the resistance to rutting is - correct answer
✔✔Asphalt Pavement Analyzer (APA)
Choose the BEST answer. Why do we want a limit on the maximum air content in asphalt concrete? -
correct answer ✔✔- Prevent fatigue
, &
- Minimize oxidative aging
The best model of material behavior for characterizing the relaxation modulus of asphalt concrete is: -
correct answer ✔✔Generalized Maxwell with a spring in parallel
The mechanism of material failure caused by repeated loads is - correct answer ✔✔fatigue
High binder contents provide ALL of the following benefit to asphalt concrete mixtures except: - correct
answer ✔✔stability
Short-term aging that occurs during production and placement of asphalt concrete is stimulated by the
following: - correct answer ✔✔Rolling Thin Film Oven Test (RFTO)
Problems Asphat Concrete has at Very High Temperatures/Modifications - correct answer ✔✔Problems
Rutting, Permanent deformation
Modifications
Decrease binder percentage
Dense aggregate gradation
Rough/angular aggregate
Problems Asphat Concrete has at Very Low Temperatures/Modifications - correct answer ✔✔Problems
Thermal cracking, low temperature cracking
Modifications
Higher F/T resistance
Binder specs for lower temps
Increase compaction (lower air voids)
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