Numerical modeling of alkali-activated slag concrete beams subjected to restrained shrinkage

During shrinkage of alkali-activated slag concrete (AASC) is higher than th at of ordinary portland cement concrete (OPCC). AASC, however; has lower el astic modulus, higher creep, and higher tensile strength than OPCC, and the se combined effects can reduce the cracking tendency This paper describes t he development of a numerical modeling of the behavior of restrained beams as a method ron ards understanding the relative contributions of parameters ton ards the risk of cracking. A stress-based model was developed, with a numerical solution obtained using a step-by-step method with small time inc rements. The numerical model results are compared with experimental results obtained from restrained beams. Reasonable estimation of rime-to-cracking was achieved with the numerical model. The cracking tendency of different c oncrete types was ranked.