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| Effect on Mechanical Properties and Hydration Characteristics of Fly Ash-cement System under High-temperature Steam Curing |
| ZHOU Yang, SHEN Pengcheng, LIU Deping, WANG Shan, BAO Wenzhong
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| 1 College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi Xinjiang 832000, China; 2 Xinjiang Tianshan Cement Co. Ltd. , Urumqi Xinjiang 830000, China; 3 Xinjiang Applied Vocational Technical College, Kuitun Xinjiang 833200, China |
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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.
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Received: 24 July 2025
Published: 25 January 2026
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