Asphalt cement - Study guides, Class notes & Summaries

The purpose of gravel on a built-up tar-and-gravel roof is __________. A. to prevent delamination of the plys B. to protect the membrane from ultraviolet rays C. to provide ballast to help hold down the roof membrane D. all of these reasons - Answer-D. all of these reasons A roof that has a problem with ponding generally still has water on it at least ____ hours after it has rained. A. 12 B. 2 C. 24 D. 48 - Answer-D. 48 The purpose of a cant strip is to __________. A. prevent the roo...

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 W...

What is asphalt? - generally a by-product of petroleum distillation; a complex hydrocarbon; soluble in petroleum products; can be naturally-occuring What is tar? - generally a by-product of coal production; resistant to petroleum products How can a source of asphalt be identified? - by solubility tests Where was asphalt obtained from originally? - Island of Trinidad and Venezuela; lakes What are petroleum-based asphalts? - a waste product from refinery-processing of crude oil; "bottom of ...

AASHTO R-66 Definition - Liquid asphalt MATERIALs include Asphalt Binder/Asphalt Cement and Asphalt Emulsion AASHTO R-97 Definition - Asphalt MIXTURES include concrete or Hot Mix Asphalt (HMA) Asphalt Binder - -Asphalt cement -High viscosity at ambient temperatures -Upon heating, becomes liquid and can be mixed with aggregates to produce HOT MIX ASPHALT (HMA) Emulsified Asphalt - -Mixture of Asphalt Binder, water, and emulsifying agent. -Liquid at ambient temperature -Primarily diluted a...

Base Course - Layer or layers of specified material of designated thickness or rate of application based on a subbase or subgrade to support the subsequent layers Bridge - Over a depression; longer than 20' The subgrade is the top _______ of roadbed upon which the pavement structure and shoulders are constructed - 18" Do not use glass in the top _____ of the embankment - 18" Clear and grub minimum of ____ from each edge of proposed pavement along both lanes and legs of interchange - 30...

AASHTO R-66 Definition - Liquid asphalt MATERIALs include Asphalt Binder/Asphalt Cement and Asphalt Emulsion AASHTO R-97 Definition - Asphalt MIXTURES include concrete or Hot Mix Asphalt (HMA) Asphalt Binder - -Asphalt cement -High viscosity at ambient temperatures -Upon heating, becomes liquid and can be mixed with aggregates to produce HOT MIX ASPHALT (HMA) Emulsified Asphalt - -Mixture of Asphalt Binder, water, and emulsifying agent. -Liquid at ambient temperature -Primarily diluted a...

Asphalt Chemistry - Bituminous material are *hydrocarbons* -very complex chemical composition that depends on the oil source and refining method -*Molecular structure is more important than composition* Asphalt types used in pavements - *Asphalt cement (asphalt binder)* -used for HMA(hot mixed asphalt) *Asphalt emulsion* -used for cold mix and maintenance applications *Asphalt cutback* -used for cold mix and maintenance applications. Asphalt Cement (binder) - Adheres to most rock -wate...

ASPHALT BINDER UPDATED Exam Questions and CORRECT Answers mostly composed of hydrocarbons and is dark brown to black in color - Ans Asphalt TYPES OF ASPHALT PRODUCTS - Ans ASPHALT CEMENT ASPHALT EMULSION ASPHALT CUTBACK Paving asphalt, a constituent of hot mix asphalt that is predominantly employed in the construction of flexible pavements, or blacktops. - Ans ASPHALT CEMENT used to create emulsified asphalt, consists of minute pieces of asphalt cement combined with water and an emu...

AHIT Home Inspection Exam Questions and Answers The purpose of gravel on a built-up tar-and-gravel roof is __________. A. to prevent delamination of the plys B. to protect the membrane from ultraviolet rays C. to provide ballast to help hold down the roof membrane D. all of these reasons -Correct Answer-D. all of these reasons A roof that has a problem with ponding generally still has water on it at least ____ hours after it has rained. A. 12 B. 2 C. 24 D. 48 -Correct Answer-D. 48 Th...

MODULE 2 ASPHALT/CONCRETE EXAM QUESTIONS AND ANSWERS (GRADED A)MODULE 2 ASPHALT/CONCRETE EXAM QUESTIONS AND ANSWERS (GRADED A)MODULE 2 ASPHALT/CONCRETE EXAM QUESTIONS AND ANSWERS (GRADED A)A 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. - ANSWER-asphalt cement A rock crusher in which a steel center cone rotates eccentrically to crush the material ag...