Triaxial Experiments on Asphalt Concrete of Maopingxi,Three Gorges under Different Temperature Conditions
Asphalt concrete is temperature-sensitive and its mechanical properties vary significantly at different temperatures.We conducted basic mechanical property tests and triaxial shear tests at different temperatures of asphalt concrete from Maopingxi in Three Gorges,and explored the influence of temperature on mechanical properties of asphalt concrete.Results show that asphalt concrete of Maopingxi is characterized with relatively low splitting tensile strength,low tensile strength,high tensile strain,high maximum bending tensile strain,high deflection span ratio,and low uniaxial compressive strength.As the testing temperature increases,the cohesion of asphalt concrete increases,the internal friction angle decreases,and the failure deviator stress decreases.Additionally the deviatoric stress increases with the increase of confining pressure,and the stress-strain curves are all of the hardening type at the end of tests.The values of deformation modulus K,n,and initial tangent Poisson's ratio G all decrease with the increase of test temperature.Experimental results can provide a reference for the evaluation of operational status of asphalt concrete core walls in dams.
asphalt concretetriaxial experimenttemperatureMaopingxi in Three Gorgesstress-strain
万方数据
维普
