Experimental Study and Development of Prediction Model of Self-Compacting Concrete Incorporating Fly Ash on Compressive Creep Behaviour

抄録

Creep strain is a significant factor affecting the dimensional stability and durability of the concrete structure. This paper aims to develop the prediction model B4TW-SCC for the creep of self-compacting concrete (SCC), which still lacks accurate prediction models. Besides, the compressive creep of SCC was experimented with by partially replacing up to 40% of the cement weight with fly ash. The tested results indicated that fly ash is highly effective in decreasing the total and basic creep of SCC, corresponding to an increase in the contents of fly ash. The new prediction model was calibrated based on the B4 model and B4TW-2020 model to fit with the creep database collected from numerous published papers with 212 test curves for total creep and 54 test curves for basic creep. The developed model was capable of the highest accuracy in predicting the creep of SCC compared with the other models, such as the B4, fib and ACI 209R-92 models, and available models of SCC CEB90 (Poppe and De Schutter) model, CEB90 (Kavanaugh) model, and the JSCE (Aslani) model.