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AL Hot and Cold Asphalt Plant Mix Paving Contractor
Practice Verified Exam Actual Test Questions and
Correct Answers With Rationales||Newest Exam!!!
What effect does the rate of loading have on an asphalt
pavement? - Answer-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? - Answer-A reliability bell curve is
plotted to determine the reliability of temperature ranges
for a given region
What is the effective asphalt content? - Answer-Effective
asphalt content is the asphalt not absorbed by the
aggregate
What tests are used to analyze pavement deformation
potential of an asphalt binder? - Answer-Rotational
Viscometer
Dynamic Shear Rheometer
Bending Beam Rheometer
Rolling Thin Film Oven
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Pressure Aging Vessel
What does the rotational viscometer test help determine? -
Answer-Mixing and compaction temperature
What does the dynamic shear rheometer test help
determine? - Answer-Rutting and pavement deformation
What does the bending beam rheometer test help
determine? - Answer-Low temperature thermal cracking
What does the rolling thin film oven test determine? -
Answer-Short term aging (during mixing, compacting,
placement)
What does the pressure aging vessel test determine? -
Answer-long term (10 year) aging
What are the different tests to use on an asphalt mix? -
Answer-Rutting (Hamburg wheel test, French wheel
tracking test, asphalt pavement analyzer)
Fatigure (Bending beam rheometer)
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Thermal cracking (semi-circular bending test, disc shaped
compact tension test, DCT, TSRST)
What device measures the creep potential of an asphalt
binder? - Answer-Bending beam rheometer
Basic Philosophy of asphalt mixture design - Answer-
Economical
Constructable
meet performance expectations
What are four present day asphalt products? - Answer-
Asphalt Cements
Asphalt Emulsifiers (waterproofing
Cutback asphalt (waterproofing)
roof shingles
What is the difference between asphalt and tar? - Answer-
asphalt is from petroleum/crude oil
tar is from coal
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Does viscosity increase or decrease as the temperature
increases? - Answer-Viscosity decreases (inverse
relationship)
What are the components of the dynamic modulus? -
Answer-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. - Answer-Air voids are
determined using the bulk and max specific gravities of the
mix, determined by obtaining weights of dry, saturated
surface dry, and submerged, and for max, taking a loose
sample, and removing air voids (rice).
Phase diagram for HMA - Answer-Air
AL Hot and Cold Asphalt Plant Mix Paving Contractor
Practice Verified Exam Actual Test Questions and
Correct Answers With Rationales||Newest Exam!!!
What effect does the rate of loading have on an asphalt
pavement? - Answer-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? - Answer-A reliability bell curve is
plotted to determine the reliability of temperature ranges
for a given region
What is the effective asphalt content? - Answer-Effective
asphalt content is the asphalt not absorbed by the
aggregate
What tests are used to analyze pavement deformation
potential of an asphalt binder? - Answer-Rotational
Viscometer
Dynamic Shear Rheometer
Bending Beam Rheometer
Rolling Thin Film Oven
,2|Page
Pressure Aging Vessel
What does the rotational viscometer test help determine? -
Answer-Mixing and compaction temperature
What does the dynamic shear rheometer test help
determine? - Answer-Rutting and pavement deformation
What does the bending beam rheometer test help
determine? - Answer-Low temperature thermal cracking
What does the rolling thin film oven test determine? -
Answer-Short term aging (during mixing, compacting,
placement)
What does the pressure aging vessel test determine? -
Answer-long term (10 year) aging
What are the different tests to use on an asphalt mix? -
Answer-Rutting (Hamburg wheel test, French wheel
tracking test, asphalt pavement analyzer)
Fatigure (Bending beam rheometer)
,3|Page
Thermal cracking (semi-circular bending test, disc shaped
compact tension test, DCT, TSRST)
What device measures the creep potential of an asphalt
binder? - Answer-Bending beam rheometer
Basic Philosophy of asphalt mixture design - Answer-
Economical
Constructable
meet performance expectations
What are four present day asphalt products? - Answer-
Asphalt Cements
Asphalt Emulsifiers (waterproofing
Cutback asphalt (waterproofing)
roof shingles
What is the difference between asphalt and tar? - Answer-
asphalt is from petroleum/crude oil
tar is from coal
, 4|Page
Does viscosity increase or decrease as the temperature
increases? - Answer-Viscosity decreases (inverse
relationship)
What are the components of the dynamic modulus? -
Answer-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. - Answer-Air voids are
determined using the bulk and max specific gravities of the
mix, determined by obtaining weights of dry, saturated
surface dry, and submerged, and for max, taking a loose
sample, and removing air voids (rice).
Phase diagram for HMA - Answer-Air
