Effect of Fly Ash on Mechanical Properties and Structure of CaO-Al₂O₃-P₂O₅-SiO₂ System

Abstract:

In this paper, mainly CaO-Al₂O₃-P₂O₅-SiO₂ gel system and the effect of fly ash on the mechanical properties and the microstructure of the hydrated system without and within lay ash at different ages have been studied. The structures were characterized by XRD and SEM. The experimental results show that fly ash does not hydrate at the early age and provides the interface, so the hydration products of CaO-Al₂O₃-P₂O₅-SiO₂ system is deposited directly on its surface, which lead to a lower early strength; but fly ash hydrates at the later age and improves the hydration of CaO-Al₂O₃-P₂O₅-SiO₂ system.

• Periodical: Applied Mechanics and Materials (Volumes 55-57)
• Pages: 1233-1236
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.55-57.1233
• Online since: May 2011
• Authors: Xiu Shu Tian, Shi Gang Mei, Shu Xia Ren
• Keywords: CaO-Al₂O₃-P₂O₅-SiO₂ System, Fly Ash (FA), Hydration

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