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Title: Comparison of glass powder and pulverized fuel ash for improving the water resistance of magnesium oxychloride cement
Authors: He, P 
Poon, CS 
Tsang, DCW 
Keywords: CO2 curing
Gel formation
Magnesium oxychloride cement (MOC)
Water resistance
Issue Date: 2018
Publisher: Elsevier Ltd
Source: Cement and concrete composites, 2018, v. 86, p. 98-109 How to cite?
Journal: Cement and concrete composites 
Abstract: The water resistance of magnesium oxychloride cement (MOC) incorporating glass powder (GP) and pulverized fuel ash (PFA) with and without CO2 curing was investigated in terms of the strength retention coefficient and the volume stability. The microstructure was studied using quantitative X-ray diffraction (QXRD), thermogravimetry (TG), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the effect of incorporating GP on the water resistance is much lower than that of PFA due to the lower pozzolanic activity of GP generating a lower amount of magnesium silica hydrate gel (M-S-H gel). The MOC incorporated with GP or PFA showed high water resistance after CO2 curing due to the higher quantity of amorphous gel that formed a much denser interlocking network.
ISSN: 0958-9465
EISSN: 1873-393X
DOI: 10.1016/j.cemconcomp.2017.11.010
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