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- W2055779802 abstract "To explain the initial hydration of quick cements of the system C 11 A 7 · CaF 2 C 2 SC 2 (A,F), their SO 3 /Al 2 O 3 ratio was varied, Portland cement was added to increase the alcalinity of the pore solution in the cement stone, and setting retarded was used during the tests. The process of hydration was investigated with the help of X-ray diffraction and scanning electron microscopy as well as via the determination of the chemically bound water. The quantity of rapidly growing ettringite crystals increases with a rising SO 3 / Al 2 O 3 value. The optimal SO 3 /Al 2 O 3 value of the system C 11 A 7 · CaF 2 C 2 SC 2 (A,F) is found between 0.26 and 0.38. The sole addition of setting retarder or Portland cement can distinctly reduce the formation of monocarbonate or even stop it completely. However, the simultaneous addition of both additives (setting retarded and a Portland cement) supports the formation of ettringite and monocarbonate crystals and through this also supports the increase of initial strength of quick cement." @default.
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- W2055779802 date "1993-12-01" @default.
- W2055779802 modified "2023-09-26" @default.
- W2055779802 title "Early hydration of quick cements in the system C11A7 · CaF2C2SC2(A,F)" @default.
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- W2055779802 doi "https://doi.org/10.1016/1065-7355(93)90012-d" @default.
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