Flexural fatigue behavior of polymer-modified pervious concrete with single sized aggregates

The objective of this research is to evaluate the flexural fatigue behavior of polymer-modified pervious concrete (PPC) with single sized aggregates which could be used in base course of infrastructures. Three aggregate sizes (27.5 mm, 32.5 mm, and 37.5 mm) were selected for single sized aggregate mixtures. A laboratory testing program was conducted obtaining the fatigue lives of PPC at various stress levels and stress ratios. 65 beam specimens of 150 mm × 150 mm × 550 mm totally were produced for each mix type, ten of which were adopted to determine the static flexural strength of PPC prior to fatigue testing. To incorporate the effects of stress level S, stress ratio R and survival probability, equivalent fatigue-life was employed to study the fatigue equation of PPC. The studies indicate that statistical distribution of equivalent fatigue life of PPC approximately followed the two-parameter Weibull distribution. The S-N relation curves and regression equations corresponding to different survival probabilities (0.5-0.95) were obtained by regression analysis. Based on these results, the fatigue life ranking as PPC-27.5 > PPC-32.5 > PPC-37.5 was declared.