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可溶盐离子对高含盐水泥土强度影响的机理分析

, PP. 26-30

Keywords: 道路工程,水泥土,试验研究,可溶盐离子,无侧限抗压强度,微观结构

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Abstract:

?通过室内不同龄期水泥土无侧限抗压强度试验,探讨了高含盐水泥土中Mg2+、Cl-、SO2-4离子含量变化对水泥土强度的影响,并借助X射线衍射技术和电子扫描显微镜来研究可溶盐离子引起水泥土强度增长的过程和机理。研究结果表明:Mg2+、Cl-、SO2-4离子对水泥土强度有不同的负面影响,且离子含量越高负面影响越大;Mg2+、Cl-、SO2-4离子不仅改变水泥土微观结构,而且抑制C-S-H和C-A-H的生成,从而导致水泥土强度降低。

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