【摘 要】
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The purpose of this work is to investigate compensation function of aluminum sulfate for alite calcium sulfoaluminate cement containing citric acid.X-ray di
【机 构】
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State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and En
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
The purpose of this work is to investigate compensation function of aluminum sulfate for alite calcium sulfoaluminate cement containing citric acid.X-ray diffraction, scanning electron microscopy and other micro-testing methods were adopted to explore this compensation function.Based on the experimental data,aluminum sulfate acts as a setting accelerator, which offset excessive retarding caused by citric acid.Aluminum sulfate not only ensures the early strength, but late growth rate is also very good.The compressive strength increases with aluminum sulfate content, and the optimum value in this study is 0.9%, contributing the most to the strength development.By micro-testing methods, we have confirmed aluminum sulfate promotes C4A3$ and C4A hydration, resulting early strength development However, the hydration of C3S and C2S havent been effected so much.
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