Effect of Fly Ash on Mechanical Properties and Structure of CaO-Al2O3-P2O5-SiO2 System
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.
X. S. Tian et al., "Effect of Fly Ash on Mechanical Properties and Structure of CaO-Al2O3-P2O5-SiO2 System", Applied Mechanics and Materials, Vols. 55-57, pp. 1233-1236, 2011