asphalt and concrete paving
Questions with Correct Answers
leveling arms - ANSWERSTwo long arms extending forward from each side of the
asphalt paver screed and attached to tow points on the tractor. This mechanical
connection enables the screed to float on the asphalt mix during placement.
contraction joints - ANSWERSJoints for the purpose of regulating cracking from the
unavoidable and unpredictable contraction of concrete.
asphalt cement - ANSWERSIt is a bituminous material that is produced by distillation of
petroleum crude oil.
flights - ANSWERSMetal plates of various shapes placed longitudinally inside the shell
of a drum dryer or mixture. As the material moves through the drum, the flight first lift
the aggregate and then tumble it through the hot gases.
friction course - ANSWERSThe top surface layer of an asphalt pavement, usually less
than 1 in. thick, to improve skid resistance and smoothness.
asphalt concrete - ANSWERSA composite material that is prepared in a hot-mix plant
and used for construction of highway, parking lot, or airfield pavements capable of
supporting high traffic load volumes and axle loads.
binder - ANSWERSThe asphalt cement material in a paving mix used to bind the
aggregate particles together, to prevent the entrance of moisture, and to act as a
cushioning agent.
lute - ANSWERSA type of rake used to smooth out minor surface irregularities in the hot
asphalt mix behind the paver. It has a straight-edge side and a toothed side
gyratory crushers - ANSWERSA rock crusher in which a steel center cone rotates
eccentrically to crush the material against the outside cylindrical steel wall.
hot-mix asphalt - ANSWERSAn asphalt paving mix produced in a plant where
aggregates are heated and dried and then combined with hot liquid asphalt cement and
placed at high temperature
tack coat - ANSWERSA light application of liquid asphalt, usually emulsified with water,
placed between pavement courses during construction. It is used to help ensure a bond
between the surface and the new mat that is being placed.
Questions with Correct Answers
leveling arms - ANSWERSTwo long arms extending forward from each side of the
asphalt paver screed and attached to tow points on the tractor. This mechanical
connection enables the screed to float on the asphalt mix during placement.
contraction joints - ANSWERSJoints for the purpose of regulating cracking from the
unavoidable and unpredictable contraction of concrete.
asphalt cement - ANSWERSIt is a bituminous material that is produced by distillation of
petroleum crude oil.
flights - ANSWERSMetal plates of various shapes placed longitudinally inside the shell
of a drum dryer or mixture. As the material moves through the drum, the flight first lift
the aggregate and then tumble it through the hot gases.
friction course - ANSWERSThe top surface layer of an asphalt pavement, usually less
than 1 in. thick, to improve skid resistance and smoothness.
asphalt concrete - ANSWERSA composite material that is prepared in a hot-mix plant
and used for construction of highway, parking lot, or airfield pavements capable of
supporting high traffic load volumes and axle loads.
binder - ANSWERSThe asphalt cement material in a paving mix used to bind the
aggregate particles together, to prevent the entrance of moisture, and to act as a
cushioning agent.
lute - ANSWERSA type of rake used to smooth out minor surface irregularities in the hot
asphalt mix behind the paver. It has a straight-edge side and a toothed side
gyratory crushers - ANSWERSA rock crusher in which a steel center cone rotates
eccentrically to crush the material against the outside cylindrical steel wall.
hot-mix asphalt - ANSWERSAn asphalt paving mix produced in a plant where
aggregates are heated and dried and then combined with hot liquid asphalt cement and
placed at high temperature
tack coat - ANSWERSA light application of liquid asphalt, usually emulsified with water,
placed between pavement courses during construction. It is used to help ensure a bond
between the surface and the new mat that is being placed.
