Prediction and model development for fatigue performance of pervious concrete made with over burnt brick aggregate

Abstract

The inadequacy of regular stone aggregate in North East India, has motivated the developers to search for an alternate construction material and prime subject of the present study is to use waste crushed bricks as a coarse aggregate in pervious concrete pavement. Pervious concrete, due to its inclusive beneficial aspects has become an embryonic solution to fight against the current hydrological and environmental threats. A number of research have been carried out to characterize the pervious concrete, however, there is a lack of study related to the fatigue performance of pervious concrete pavement. As the pavements are often subjected to fatigue loading, the present study mainly focuses on the response of pervious concrete pavement under the action of fatigue loading. Laboratory tests are performed on beam specimens under various stress levels and loading frequencies. Different types of aggregate gradations are also used to account the size effect of the coarse aggregate. The S–N curves for fatigue life is generated to obtain the relationship between the stress level and fatigue life and it is observed that the S–N curve follows a power law, irrespective of loading frequencies. The survival percentage of porous specimens are checked through non-parametric Kaplan–Meir survival analysis and the distributions of the fatigue data are checked through lognormal and 3-parameter Weibull distributions. Further, a modified fatigue model is developed for idealising the fatigue life of pervious concrete pavement made with over burnt brick aggregate and compared with the existing fatigue models.