Document Type

Journal Article

Publication Date

2025

Abstract

The significant effect of temperature on the early-age compressive strength development of fly ash concrete was investigated through experimental study and modeling calculations in this paper. The compressive strengths of concrete specimens with different fly ash to binder ratios, cured at three different temperatures, were tested at various ages. The experimental results demonstrate a significant difference in strength development between ordinary concrete and fly ash concrete, indicating that the existing maturity model for normal concrete is unsuitable for predicting the compressive strength of fly ash concrete. To further quantitatively analyze the effect, the maturity model, which takes into account the different curing temperature histories for fly ash concrete, was modified by reevaluating the coefficient "s" with reference to the fib Model Code 2010. This modification allows for the real-time prediction of compressive strength development based on regression analysis of experimental data obtained in this study. The results indicate that, compared to the original strength function, the compressive strength of fly ash concrete predicted by the modified maturity model is more accurate, demonstrating that the modified model can effectively monitor and predict the real-time compressive strength of fly ash concrete at construction sites.

Source Publication

Proceedings of The 2025 World Congress on Advances in Structural Engineering and Mechanics (ASEM25)

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