Flexural fatigue performance of concrete made with recycled concrete aggregates and ternary blended cements

Results of an investigation to evaluate the flexural fatigue performance of concretes made with fly ash, silica fume (SF) as partial replacement of Portland cement and 100% coarse recycled concrete aggregates (RCA) are reported. Flexural fatigue test data were obtained based on 168 static flexural tests and flexural fatigue tests conducted using Servo-controlled Actuator. The test data thus obtained were analysed and equations to estimate the flexural fatigue strength of concrete mixes were proposed. The probability distributions for the fatigue life of various concretes were also established. The flexural fatigue performance of various concrete mixes was assessed in terms of mean and design fatigue lives. The results obtained from the study show that flexural fatigue performance of concrete containing 100% RCA with 10% SF performed better than concrete containing 100% coarse natural aggregate.