Influences of temperature on mechanical properties of cement asphalt mortars

• Published in: Materials and structures 2014, Vol.47 (1-2), p.285-292
• Main Authors: Kong, Xiang-ming, Liu, Yong-liang, Zhang, Yan-rong, Zhang, Zhen-lin, Yan, Pei-yu, Bai, Yun
• Format: Article
• Language: English
• Subjects: Applied sciences; Asphalt; Bitumen. Tars. Bituminous binders and bituminous concretes; Building construction; Building Materials; Buildings. Public works; Cams; Cements; Civil Engineering; Compressive strength; Elastic modulus; Engineering; Exact sciences and technology; Machines; Manufacturing; Materials; Materials Science; Mechanical properties; Modulus of elasticity; Mortars; Original Article; Processes; Solid Mechanics; Strength of materials (elasticity, plasticity, buckling, etc.); Structural analysis. Stresses; Theoretical and Applied Mechanics
• ISSN: 1359-5997; 1871-6873
• DOI: 10.1617/s11527-013-0060-2

The compressive mechanical properties of cement asphalt mortars (CAMs) with varied bitumen-cement ratio (B/C) were studied under different temperatures, in order to reveal the susceptibility of mechanical properties to temperature. Results indicate that the compressive strength and the elastic modulus generally increase with a decrease in temperature for all tested CAMs. The quantitative evaluation of the temperature dependence of the strength and the elastic modulus using defined temperature-sensitivity factors is proposed and validated by the test results, which show that the mechanical properties of those CAMs with higher B/C have greater temperature sensitivity. For a given CAM, the temperature-sensitivity factor of the strength is larger than that of the elastic modulus. The temperature-sensitivity factors enable estimating the compressive strength and the elastic modulus of CAMs at selected temperatures from the tested values at a reference temperature, such as room temperature, by using the proposed equations. The relative elastic modulus is found to be in direct proportion to the square root of the relative compressive strength at a selected temperature, i.e. E r ∝ σ pr .