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Ⅰ类红砂岩崩解性抑制措施试验研究

Keywords: 道路工程,红砂岩,抑制方法,崩解,化学溶液

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Abstract:

公路工程实践表明红砂岩崩解可导致压实不足的路基沉陷,也可能导致充分压实的路基膨胀开裂,因此需要研究抑制红砂岩崩解性的工程措施。在对崩解性最强的Ⅰ类红砂岩成分和崩解性状研究基础上,采用ICP-MS测试技术对红砂岩的蒸馏水浸泡过程进行了化学成分跟踪,测试发现水解液中有Ca2+、Mg2+、K+、Na+等离子出现,且部分离子浓度随岩石崩解进行而增长。在此基础上,选用Ca(OH)2、CaCl2、MgCl2、NaCl几种盐溶液作为水解液进行红砂岩耐崩解性试验,表明不同成分水解液对Ⅰ类红砂岩崩解性具有不同抑制作用。进一步采用Ⅰ类红砂岩填料和掺石灰、水泥改良红砂岩填料的浸出液作为水解液,对Ⅰ类红砂岩进行耐崩解试验,得到了掺7%石灰改良是抑制Ⅰ类红砂岩崩解的最佳工程措施的结论。

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