WAQTC: ASPHALT 2 EXAM QUESTIONS AND ANSWERS

WAQTC: ASPHALT 2 EXAM QUESTIONS AND
ANSWERS



What are the two primary ingredients in asphalt mixtures? - ANSWER
Aggregate & asphalt binder


HMA - ANSWER Hot Mix Asphalt


WMA - ANSWER Warm Mix Asphalt


3 Types of Asphalt Mixtures? - ANSWER Dense-graded
Open-graded
Gap-graded


What's included in the total volume of an asphalt mix? - ANSWER Entrapped
air voids
Moisture
Effective & absorbed binder
Mineral aggregate


Air Voids (Va) - ANSWER Total volume of small air pockets between coated
aggregate


SMA - ANSWER Stone matrix asphalt

, Cutback Asphalt - ANSWER Binder that's been modified by blending w/a
chemical solvent


Gmm - ANSWER Theoretical maximum specific gravity


Gmb - ANSWER Measured bulk specific gravity


Gsb - ANSWER Oven-dry bulk specific gravity of aggregate


Gsa - ANSWER Apparent specific gravity of aggregate


Gse - ANSWER Effective specific gravity


Gb - ANSWER Specific gravity of the asphalt binder


Containers used for sampling - ANSWER Cardboard boxes, metal cans,
stainless steel bowls, or other agency approved containers


Specifications of sampling plate ANSWER Heavy-gauge metal, at least 8 gage
wire attached to corner, long enough to reach from the center of the paver to the
farthest auger extension Min one 0.25 in. hole in the corner of the plate


Mechanical Sampling Device - ANSWER A permanently attached device that
allows the sampling receptacle to pass through the entire stream of material or
diverts material into the container by manual, hydraulic, or pneumatic operation