カルシウムサルホアルミネートの水和に及ぼすホウ酸の影響

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タイトル別名
  • Effect of Boric Acid on Hydration of Calcium Sulfoaluminate

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抄録

The properties of Al-rich gelatinous materials precipitated from the filtered solution of tetracalcium sulfoaluminate (CSA) paste and the H3BO3 solution were investigated in this study. Because of amphoteric properties of Al, the stability of Al-rich gelatinous materials depends on the pH of solution. For example, Al-rich gel had a low solubility around 6 of pH, but it had a high solubility in both high alkaline side and high acid side of pH. The change in solubility of Al-rich gel with pH had a major effect on retardation and re-activation of the hydration reaction of CSA with H3BO3 solution. The hydration reaction of CSA with H3BO3 solution can be controlled by changes in pH of solution.

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