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首页> 外文期刊>Geotechnique >Hydrophobic modification of an expansive soil using polymers and organic compounds: a comparative study with lime
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Hydrophobic modification of an expansive soil using polymers and organic compounds: a comparative study with lime

机译：使用聚合物和有机化合物对膨胀土进行疏水改性：与石灰的对比研究

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摘要

Soil was modified with organic compounds to change its hydrophilic groups (OHs) by hydrophobic groups (CH_3 for ClMeSi or PMMA for copolymer). In both cases a chemical barrier was created that repelled water molecules and swelled ions, reducing the expansion effects. The use of PMMA-PAAc and ClMeSi as additives produces a significant increase in the RSV and a reduction in the REC. The RSV was increased from 0.5 (natural soil) to 8.0 (soil-copolymer) with 1.0% of additive, and the REC was reduced from 14.7 (natural soil) to 5.9 (soil-ClMeSi), also with 1% of additive. This means that the copolymer is a good additive to increase the RSV.
机译：用有机化合物对土壤进行了改性，以通过疏水基团（ClMeSi为CH_3或共聚物为PMMA）改变其亲水基团（OHs）。在这两种情况下，都会形成化学屏障，从而排斥水分子和溶胀的离子，从而降低了膨胀效应。使用PMMA-PAAc和ClMeSi作为添加剂会显着增加RSV，并降低REC。在添加了1.0％的添加剂的情况下，RSV从0.5（天然土壤）增加到8.0（土壤-共聚物），而在添加了1％的添加剂的情况下，REC从14.7（天然土壤）降低到5.9（土壤-ClMeSi）。这意味着该共聚物是增加RSV的良好添加剂。

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