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- W3092074144 abstract "Abstract In order to reduce the production cost and improve the properties of magnesium oxychloride cement (MOC), this paper studied the influence of single and compound addition of fly ash (FA) and metakaolin (MK) on MOC from two aspects of macroscopic and microcosmic characteristics. Macroscopic characterizations include setting time, compressive strength, mass change, ultrasound velocity, and microscopic characterizations include hydration phases, microstructure, and hydration process. The results showed that FA could delay the setting of MOC, and slow down the hydration process of MOC. However, the effect of MK on MOC was opposite. The single and compound addition of FA and MK did not change the phase composition of the hydration products in MOC, but conducive to the formation of richer, thicker and longer phase 5. The compressive strength, mass change and compactness of MOC decreased with the increase of admixture content. However, when the replacement level of MgO by single-doped FA or MK, and combination of FA and MK is 10%, MOC with the properties of rapid setting time, early and high strength, light weight, and advantage in density was obtained. This may provide a basis for further developing the properties of MOC products." @default.
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- W3092074144 date "2021-01-01" @default.
- W3092074144 modified "2023-10-18" @default.
- W3092074144 title "Effect of fly ash and metakaolin on the macroscopic and microscopic characterizations of magnesium oxychloride cement" @default.
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- W3092074144 doi "https://doi.org/10.1016/j.conbuildmat.2020.120957" @default.
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