CVEN 342 Asphalt & Cement Test Questions and Answers with complete solution

From a fatigue perspective, the asphalt cement content should be minimized. - FALSE Stiffness of asphalt concrete increases with decreasing the frequency of loading - FALSE Performance grading requires that the measured properties of asphalt cements meet a specific maximum or minimum limit at a specific temperature - TRUE Aging of asphalt cement decreases viscosity - FALSE The objective of rotational viscometer testing is to determine asphalt binder flash point - FALSE All of the following are laboratory tests for asphalt binder characterizations - Brookfield Rotational Viscometer (RV), Dynamic Shear Rheometer (DSR), Bending Beam Rheometer (BBR) The PG binder specifications, the property that controls mixture resistance to fatigue cracking is - G*sin(delta) All of the following are maximum specifications in the PG binder specification - Resistance to thermal cracking in terms of stiffness, resistance to rutting, resistance to fatigue cracking One example of a liquid asphalt is: - cutback An asphalt concrete mixture test used to estimate resistance to rutting is: - Asphalt Pavement Analyzer (APA) The concept of time-temperature superposition is used to characterize asphalt concrete in terms of a master curve for the following parameter - StiffnessThe best model of material behavior (relaxation modulus) for asphalt concrete is - Generalized Maxwell with a spring in parallel All of the following are important steps in the asphalt concrete production and placement process - Controlling aggregate gradation, completing compaction at high temperature, drying aggregate The mechanism of asphalt mixture failure caused by repeated loads is - Fatigue All of the following are advantages the superpave volumetric mix design system for asphalt concrete has over traditional mix design systems - Inclusion of larger nominal maximum aggregate gradations, measurement of compactibility, inclusion of modified binders High binder contents provide all of the following benefit to asphalt concrete mixtures - Durability, Resistance to fatigue cracking, resistance to thermal cracking The PG binder specification has the following main advantage over traditional binder grading systems - Characterization at low pavement temperatures The model of material behavior that represents instantaneous, non-time dependent response - a spring Short-term aging that occurs during production and placement of asphalt concrete is simulated by - Rolling Thin Film Oven Test (RFTO) Asphalt binder tests 1-5 - 1. No aging 2. RFTO 3. Short term aging 4. PAV 5. Long term agingWhat is a problem at intermediate temperatures - Fatigue