Fatigue Property Evaluation of Sustainable Porous Concrete Modified by Recycled Ground Tire Rubber/Silica Fume under Freeze-Thaw Cycles

As an environmentally friendly pavement material, porous concrete in seasonal frozen region is often subjected to repeated loads and freeze-thaw cycles. Therefore, the fatigue property of under extremely important. However, few researches have been reported on topic. Based this background, paper investigates flexural ground tire rubber/silica fume composite modified (GTR/SF-PC) with experimental mathematical statistical methods. The life GTR/SF-PC different cycles (0, 15, 30) was tested three-point experiment at four stress levels (0.70, 0.75, 0.80, 0.85). Kaplan Meier survival analysis Weibull model were adopted analyze characterize life. equations established. results indicate that, duo addition rubber silica fume, static strength not significantly affected by gradually deteriorated action Compared 0 cycles, average decreases about 15% failure rate increases 50% after 30 respectively. reliabilities show that reliability inversely proportional life, therefore, appropriate equation considering effect necessary for design concrete.