ANALYSIS ON TIME-DEPENDENT DEFLECTION OF RECYCLED AGGREGATE CONCRETE BEAMS

Considering the shrinkage and creep characteristics of recycled aggregate concrete (RAC), the time-dependent deflection of recycled concrete beams was analyzed. The influence of shrinkage and creep was taken into consideration separately. Through cross-sectional time-dependent analysis, the expression of time-varying relative compressive zone was established. Based on experimental data from published literature, the accuracy of analysis results was verified. The results showed that most of the errors were within 19% regardless of the value of replacement ratio of recycled coarse aggregate. This study shows the characteristics of time-dependent deflection of recycled concrete beams and provides an alternative theoretical basis for the prediction of long-term deflection of concrete beams.