Modeling Mechanical Properties of Cement Asphalt Emulsion Mortar with Different Asphalt to Cement Ratios and Temperatures

摘要

The compressive strength and elastic modulus of cement asphalt emulsion mortar (CAM) are two fundamental parameters of material design, and their values are highly dependent on asphalt:cement mass ratio (A/C) and temperature. However, there are few quantitative studies about the effect of A/C and temperature on the mechanical properties of CAM. This paper studies the compressive strength and elastic modulus of CAM with varied A/C at different temperatures. A physical and mathematic model is proposed to relate the compressive strength and elastic modulus of CAM to asphalt:cement volume ratio (VA/VC) and temperature. The proposed model calculates the compressive strength (or elastic modulus) of CAM by the compressive strength (or elastic modulus) of cement mortar, VA/VC, and a parameter b. The parameter b is related to the rigidity and adhesive ability of asphalt binder, and it has a linear relationship with temperature. The proposed model can accurately predict the mechanical properties of CAM with different VA/VC and temperatures, and thus it provides a good method to study the mechanical properties of CAM. The limitations of the proposed model are discussed.