Abstract: In order to increase early strength and achieving early demoulding in the production of precast concrete components. This study investigates the mechanical properties and hydration characteristics of a fly ash-cement system with fly ash (FA) contents under at 90℃ steam curing. Results show that under steam curing conditions, the final compressive and flexural strength of pure cement mortar (0%FA specimen) are lower compared to those under standard curing, which is reduced by 15.41% and 28.27%, respectively. Similarly, the final compressive and flexural strength of the mortars containing fly ash (15%FA and 30%FA specimen) under steam curing conditions are also lower than those under standard curing conditions, which decreased by 4.27% and 13.90% for the 15% FA specimen, and by 4.16% and 9.32% for the 30% FA specimen, respectively. Especially when the fly ash content reaches 45%, there is no loss in final compressive strength or flexural strength but rather an increase by 13.71% and 26.8%, respectively. Furthermore steam curing not only promotes cement hydration rate but also enhances secondary hydration reaction between early-stage fly ash and calcium hydroxide.
周阳, 沈鹏程, 刘德平, 王姗, 包文忠. 高温蒸汽养护对粉煤灰-水泥胶砂体系力学性能及水化特性的影响研究[J]. 水泥技术, 2026, 1(1): 32-39.
ZHOU Yang, SHEN Pengcheng, LIU Deping, WANG Shan, BAO Wenzhong. Effect on Mechanical Properties and Hydration Characteristics of Fly Ash-cement System under High-temperature Steam Curing. Cement Technology, 2026, 1(1): 32-39.
