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- W2922365887 abstract "As a type of corrosive mixed solution, karst water contains not only chloride and sulfate ions, but also a significant amount of bicarbonate ions. The early mechanical properties and microstructure of a metakaolin-based geopolymer and metakaolin/slag geopolymers (with 20 and 40 wt% slag replacing the metakaolin) immersed in karst water were investigated using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Barrett-Joyner-Halenda (BJH) analysis, and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS). The results showed that a reduction in mechanical strengths associated with variations in the pore size, excess of alkalis (Na2O), decalcification of C-S-H, and calcium carbonate precipitation occurred after immersion in karst water. Furthermore, the geopolymers with the addition of less slag had a greater ability to resist corrosion by karst water. This is related to the formation of calcium carbonate in the calcium-rich geopolymer, along with the excess of alkali (Na+) for activated slag led to dissolve to the karst water." @default.
- W2922365887 created "2019-03-22" @default.
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- W2922365887 date "2019-05-01" @default.
- W2922365887 modified "2023-10-17" @default.
- W2922365887 title "Early mechanical properties and microstructural evolution of slag/metakaolin-based geopolymers exposed to karst water" @default.
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- W2922365887 doi "https://doi.org/10.1016/j.cemconcomp.2019.03.009" @default.
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