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水泥土添加剂的室内试验

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Keywords: 道路工程,水泥土添加剂,试验研究,无侧限抗压强度,能谱分析,X射线衍射

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Abstract:

？通过分别对加有SN-Ⅱ高效减水剂、Al(OH)3和CaCl2早强剂以及不加添加剂的水泥土进行7、28、90d龄期的微观结构分析试验,结合无侧限抗压强度试验,研究水泥土添加剂的作用机理。结果表明:添加剂SN-Ⅱ的宏观力学性质表现为水泥土28d强度有明显提高,添加剂Al(OH)3和CaCl2的宏观力学性质表现为水泥土7、28、90d强度均有明显提高。微观结构分析表明:添加剂SN-Ⅱ不参与水泥土的水化反应,对水泥土的影响主要体现在改变水化速度和水化产物空间结构上;添加剂Al(OH)3和CaCl2既参与水泥土水化反应,又可改变其水化速度和空间结构。

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