Asphalt Concrete Quiz#6 with 100% Verified solutions| Graded A+

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Asphalt is following type of material: A. Elastic B. Viscous C. Viscoelastic D. Plastic - ✔✔C. Viscoelastic How compaction density of asphalt is monitored during construction? A. Collecting ... samples and testing in lab B. Using nuclear density gauge C. Using infrared camera D. none of the above - ✔✔B. Using nuclear density gauge Which asphalt product (emulsion or cutback) is more environmental-friendly? A. Asphalt cement B. Emulsion C. Cutback asphalt D. all of the above - ✔✔B. Emulsion What is the benefit of cutback asphalt and emulsion over asphalt cement? A. EconomicalB. Applied at lower temperature C. Provides more strength D. none of the above - ✔✔B. Applied at lower temperature Which of the followings in not one of the constituents of conventional asphalt? A. Aspaltenes B. Resins C. Polymer D. Oils - ✔✔C. Polymer You perform a standard Penetration Test at 77oF (25oC) on a sample of asphalt cement submitted to your laboratory for Penetration grading. The needle penetrates the sample 9.2 mm. (a) What is the penetration value of the asphalt in "penetration units"? A. 0.92 B. 9.2 C. 92 D. 920 - ✔✔C. 92 Which of the following binders will be more resistant to rutting and cracking for wider variation of temperatures? A. PG 64-22 B. PG 70-28 C. PG 58-22 D. PG 70-34 - ✔✔D. PG 70-34As an inspector on road construction project, what is important to record during the delivery of asphalt mix truck? A. Make sure the truck is not overloaded B. Time mix received C. location at which mix was placed D. temperature of the mix E. all of the above - ✔✔E. all of the above What is the correct sequence of pavement compaction? A. Pneumatic tired rolling, then, Nonvibratory steel wheeled rolling, then, Steel wheeled vibratory rolling B. Steel wheeled vibratory rolling, then, Pneumatic tired rolling, then, Nonvibratory steel wheeled rolling C. Nonvibratory steel wheeled rolling, then, Pneumatic tired rolling, then, Steel wheeled vibratory rolling D. Steel wheeled vibratory rolling, then, Nonvibratory steel wheeled rolling, then, Pneumatic tired rolling - ✔✔B. Steel wheeled vibratory rolling, then, Pneumatic tired rolling, then, Nonvibratory steel wheeled rolling Longitudinal joints are rolled at the end regardless of their location. True False - ✔✔False Too many roller passes will increase the density of the pavement.True False - ✔✔False Asphalt cement is pure asphalt and asphalt binder includes both neat asphalt cement and modified asphalt cement made by adding polymers for improving properties of asphalt. True False - ✔✔True Asphalt mix is considerably different than other materials such as cement concrete as its properties are very sensitive to temperature, rate of loading and aging. True False - ✔✔True A tack coat is a thin layer of emulsion or cutback asphalt applied between pavement layers which act as a glue (or promote bonding) between layers. True False - ✔✔True Which of the following asphalt mixes is most suitable for patching potholes on less-trafficked roads: A. Hot mix asphalt B. Warm mix asphalt C. Cold mix asphalt D. All of the above - ✔✔C. Cold mix asphaltAir void is important in asphalt mixes to accommodate viscosity changes of binder under load and temperature. True False - ✔✔True How many tons of asphalt concrete will be required to overlay a 3-mile-long, 12-ft-wide road with 2.5 inch of wearing course asphalt concrete that has a density of 146.3 pcf? (Note: 1 mile = 5280 ft) A. 1857 tons B. 2897 tons C. 4867 tons D. 5897 tons - ✔✔B. 2897 tons Subgrade of a pavement consists of following A. Aggregates B. Compacted foundation soil C. Asphalt concrete mix D. Granular sand - ✔✔B. Compacted foundation soil Following pavement is classified as full-depth pavement: A. Asphalt mix surface with regular aggregate base B. Asphalt mix surface with asphalt-aggregate mix base C. Asphalt mix surface with cement concrete base D. None of the above - ✔✔B. Asphalt mix surface with asphalt-aggregate mix baseRAP (Reclaimed asphalt pavement) is most recycled product in the world. True False - ✔✔True [Show More]

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