Influence of loading and high temperature on uniaxial compressive properties of desert sand concrete
In order to research on the mechanical properties of desert sand concrete(DSC)after high temperature,desert sand from Mu Us sandy land was used to partially replace medium sand to make DSC.The uniaxial compression experiments of DSC subjected to different loadings and temperatures were carried out to obtain the stress-strain curves.The influences of loading level,temperature and cooling methods on the mass loss rate,ultrasonic velocity and axial compressive properties were analyzed.Experimental results showed that the mass loss rate of DSC gradually increased with the temperature.The uniaxial compressive strength and modulus of elasticity of DSC declined,peak strain increased greatly,and the stress-strain curve gradually became flat.Taking into account of temperature and loading level,the constitutive model was established to simulate the mechanical properties of DSC based on the two-stage constitutive model,which provided technical support for the performance evaluation of DSC after high temperature.
万方数据
维普
