CE 382 HMA FINAL EXAM2025/2026 |ACTUAL REAL
EXAM QUESTIONS | WITH CORRECT COMPLETE
SOLUTIONS (VERIFIED ANSWERS) /NEWEST UPDATE .
What does a dynamic shear rheometer characterize for asphalt
binder's in the Superpave binder grading system? - ANSWER-
Viscous and elastic behaviors of asphalt at medium to high
temperatures (helps analyze potential rutting and pavement
deformation)
What approach is used in selected an asphalt binder in
Superpave and what are its benefits.? - ANSWER-climate data
is compiled and compared at different stations across US,
performance grade based on high and low temps is selected
Stiffness ____ as temp increases. - ANSWER-decreases
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
Effective asphalt
Absorbed asphalt
Aggregate
What does asphalt primarily consist of chemically? -
ANSWER-80% by weight of carbon; around 10% hydrogen;
up to 6% sulfur; small amounts of oxygen and nitrogen;
trace amounts of metals such as iron, nickel, and vanadium.
What does a chart of binder susceptability look like? -
ANSWER-Rotational viscometer graph Temperature (x-axis)
Log[viscosity] (y-axis)
inversely correlated
What Superpave binder procedure is used to simulate the
oxidative aging that occurs in asphalt binders during pavement
service? - ANSWER-Pressure Aging Vessel (key word is
'pavement service')
What are the voids in the mineral aggregate? - ANSWER-VMA is
the spaces between the aggregate (before asphalt is added)
, What are the voids filled with asphalt? - ANSWER-VFA is the
the amount of voids in the mineral aggregate that are filled with
asphalt
List three objectives of an asphalt concrete mix design process
- ANSWER-
Resist Deformation
Resist rutting
Resist temperature cracking
Prevent hardening ad aging before placement
Be impervious to water
Binder should bind to aggregate completely
Workability must be high
How to obtain the bulk specific gravity of a compacted asphalt
mix in a laboratory. - ANSWER-determined by obtaining
weights of dry, saturated surface dry, and submerged,
Criteria for binder property selection for unaged, RTFO and
BBR - ANSWER-
Unaged ≥ 1.0
RTFO ≥ 2.2
BBR S ≤ 300, m ≥ 0.30
EXAM QUESTIONS | WITH CORRECT COMPLETE
SOLUTIONS (VERIFIED ANSWERS) /NEWEST UPDATE .
What does a dynamic shear rheometer characterize for asphalt
binder's in the Superpave binder grading system? - ANSWER-
Viscous and elastic behaviors of asphalt at medium to high
temperatures (helps analyze potential rutting and pavement
deformation)
What approach is used in selected an asphalt binder in
Superpave and what are its benefits.? - ANSWER-climate data
is compiled and compared at different stations across US,
performance grade based on high and low temps is selected
Stiffness ____ as temp increases. - ANSWER-decreases
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
Effective asphalt
Absorbed asphalt
Aggregate
What does asphalt primarily consist of chemically? -
ANSWER-80% by weight of carbon; around 10% hydrogen;
up to 6% sulfur; small amounts of oxygen and nitrogen;
trace amounts of metals such as iron, nickel, and vanadium.
What does a chart of binder susceptability look like? -
ANSWER-Rotational viscometer graph Temperature (x-axis)
Log[viscosity] (y-axis)
inversely correlated
What Superpave binder procedure is used to simulate the
oxidative aging that occurs in asphalt binders during pavement
service? - ANSWER-Pressure Aging Vessel (key word is
'pavement service')
What are the voids in the mineral aggregate? - ANSWER-VMA is
the spaces between the aggregate (before asphalt is added)
, What are the voids filled with asphalt? - ANSWER-VFA is the
the amount of voids in the mineral aggregate that are filled with
asphalt
List three objectives of an asphalt concrete mix design process
- ANSWER-
Resist Deformation
Resist rutting
Resist temperature cracking
Prevent hardening ad aging before placement
Be impervious to water
Binder should bind to aggregate completely
Workability must be high
How to obtain the bulk specific gravity of a compacted asphalt
mix in a laboratory. - ANSWER-determined by obtaining
weights of dry, saturated surface dry, and submerged,
Criteria for binder property selection for unaged, RTFO and
BBR - ANSWER-
Unaged ≥ 1.0
RTFO ≥ 2.2
BBR S ≤ 300, m ≥ 0.30
