| K+与PVA协同作用对膨胀土水化膨胀的抑制作用 |
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| 引用本文： | 于进庆,胡瑞林,尚海敏,崔芳鹏,杨明亮.K+与PVA协同作用对膨胀土水化膨胀的抑制作用[J].岩土工程学报,2008,30(6):900-905. |
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| 作者姓名： | 于进庆 胡瑞林 尚海敏 崔芳鹏 杨明亮 |
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| 作者单位： | 中国科学院地质与地球物理研究所工程地质力学重点实验室；中建铁路建设有限公司 北京100029；北京100029；北京100037； |
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| 基金项目： | 国家科技支撑计划
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 从晶层膨胀与渗透膨胀的微观角度分析了膨胀土的水化膨胀机理,在此基础上提出了以抑制水化膨胀和减少环境负担为目的的K+与聚乙烯醇(PVA)合成剂。通过自由膨胀率试验、颗分试验与水化崩解试验证实K+与PVA能产生协同抑制作用,可有效降低膨胀土的自由膨胀率、改善其粒度成分并提高其水稳性,而0.6%的PVA溶液与7%KCl溶液组合被认为是一种经济合理的配比选择。
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| 关 键 词： | 晶层膨胀 渗透膨胀 PVA K< sup> +< /sup> 协同作用 |
| 文章编号： | 1000-4548(2008)06-0900-06 |
| 修稿时间： | 2007年9月24日 |
Synergistic reaction of K+ and pllyvinyl alcohol on restraing swelling and hydrating behavior of expansive soil |
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| YU Jin-qing,HU Rui-lin,SHANG Hai-min,CUI Fang-peng,YANG Ming-liang.Synergistic reaction of K+ and pllyvinyl alcohol on restraing swelling and hydrating behavior of expansive soil[J].Chinese Journal of Geotechnical Engineering,2008,30(6):900-905. |
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| Authors: | YU Jin-qing HU Rui-lin SHANG Hai-min CUI Fang-peng YANG Ming-liang |
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| Affiliation: | 1.Key Laboratory of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 2.China Construction Railway Construction Ltd. Beijing 100037 China |
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| Abstract: | K+ and pllyvinyl alcohol were choosen as the inhibition reagent on the hydrating and swelling behavior of expansive soil on the basis of the studies on crystalline swelling and osmosis swelling.Synergistic reaction of K+ and pllyvinyl alcohol which were thought friendly to the environment was proved by a series of tests.It would reduce the free swelling ratio,improve the granularity ingredient and enhance the stability in water.The composition of KCI solution of 7% with pllyvinyl alcohol of 0.6% was regarded as a reasonable proportion. |
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| Keywords: | crystalline swelling osmosis swelling pllyvinyl alcohol K+ synergistic reaction |
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