CE 382 HMA FINAL EXAM |ACTUAL EXAM
QUESTIONS | WITH COMPLETE SOLUTIONS/NEWEST
UPDATE
Basic Philosophy of asphalt mixture design - (answers)Economical
Constructable
meet performance expectations
What are four present day asphalt products? - (answers)Asphalt Cements
Asphalt Emulsifiers (waterproofing
Cutback asphalt (waterproofing)
roof shingles
What is the difference between asphalt and tar? - (answers)asphalt is from
petroleum/crude oil
tar is from coal
Does viscosity increase or decrease as the temperature increases? -
(answers)Viscosity decreases (inverse relationship)
What effect does the rate of loading have on an asphalt pavement? -
(answers)High Temp + low rate = viscous
Low Temp or high rate = elastic
,What statistical approach is used in selecting a binder and what are its benefits? -
(answers)A reliability bell curve is plotted to determine the reliability of
temperature ranges for a given region
What is the effective asphalt content? - (answers)Effective asphalt content is the
asphalt not absorbed by the aggregate
What tests are used to analyze pavement deformation potential of an asphalt
binder? - (answers)Rotational Viscometer
Dynamic Shear Rheometer
Bending Beam Rheometer
Rolling Thin Film Oven
Pressure Aging Vessel
What does the rotational viscometer test help determine? - (answers)Mixing and
compaction temperature
What does the dynamic shear rheometer test help determine? - (answers)Rutting
and pavement deformation
What does the bending beam rheometer test help determine? - (answers)Low
temperature thermal cracking
, What does the rolling thin film oven test determine? - (answers)Short term aging
(during mixing, compacting, placement)
What does the pressure aging vessel test determine? - (answers)long term (10
year) aging
What are the different tests to use on an asphalt mix? - (answers)Rutting
(Hamburg wheel test, French wheel tracking test, asphalt pavement analyzer)
Fatigure (Bending beam rheometer)
Thermal cracking (semi-circular bending test, disc shaped compact tension test,
DCT, TSRST)
What device measures the creep potential of an asphalt binder? -
(answers)Bending beam rheometer
What are the components of the dynamic modulus? - (answers)Apply a repeated
load at varying frequencies to a test specimen over a relatively short period of
time and measure the specimen's recoverable strain and permanent deformation.
Some dynamic modulus tests are also able to measure the lag between the peak
applied stress and the peak resultant strain, which provides insight into a
material's viscous properties. Test results correlate reasonably well with in-service
pavement rutting measurements but the test is somewhat involved and difficult
to run.
How are air voids determined? Be specific about the tests and corresponding
properties. - (answers)Air voids are determined using the bulk and max specific
QUESTIONS | WITH COMPLETE SOLUTIONS/NEWEST
UPDATE
Basic Philosophy of asphalt mixture design - (answers)Economical
Constructable
meet performance expectations
What are four present day asphalt products? - (answers)Asphalt Cements
Asphalt Emulsifiers (waterproofing
Cutback asphalt (waterproofing)
roof shingles
What is the difference between asphalt and tar? - (answers)asphalt is from
petroleum/crude oil
tar is from coal
Does viscosity increase or decrease as the temperature increases? -
(answers)Viscosity decreases (inverse relationship)
What effect does the rate of loading have on an asphalt pavement? -
(answers)High Temp + low rate = viscous
Low Temp or high rate = elastic
,What statistical approach is used in selecting a binder and what are its benefits? -
(answers)A reliability bell curve is plotted to determine the reliability of
temperature ranges for a given region
What is the effective asphalt content? - (answers)Effective asphalt content is the
asphalt not absorbed by the aggregate
What tests are used to analyze pavement deformation potential of an asphalt
binder? - (answers)Rotational Viscometer
Dynamic Shear Rheometer
Bending Beam Rheometer
Rolling Thin Film Oven
Pressure Aging Vessel
What does the rotational viscometer test help determine? - (answers)Mixing and
compaction temperature
What does the dynamic shear rheometer test help determine? - (answers)Rutting
and pavement deformation
What does the bending beam rheometer test help determine? - (answers)Low
temperature thermal cracking
, What does the rolling thin film oven test determine? - (answers)Short term aging
(during mixing, compacting, placement)
What does the pressure aging vessel test determine? - (answers)long term (10
year) aging
What are the different tests to use on an asphalt mix? - (answers)Rutting
(Hamburg wheel test, French wheel tracking test, asphalt pavement analyzer)
Fatigure (Bending beam rheometer)
Thermal cracking (semi-circular bending test, disc shaped compact tension test,
DCT, TSRST)
What device measures the creep potential of an asphalt binder? -
(answers)Bending beam rheometer
What are the components of the dynamic modulus? - (answers)Apply a repeated
load at varying frequencies to a test specimen over a relatively short period of
time and measure the specimen's recoverable strain and permanent deformation.
Some dynamic modulus tests are also able to measure the lag between the peak
applied stress and the peak resultant strain, which provides insight into a
material's viscous properties. Test results correlate reasonably well with in-service
pavement rutting measurements but the test is somewhat involved and difficult
to run.
How are air voids determined? Be specific about the tests and corresponding
properties. - (answers)Air voids are determined using the bulk and max specific
