| 不同干燥方法对重塑膨润土压汞试验用土样的影响试验研究 |
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| 引用本文： | 张平,房营光,闫小庆,何智威.不同干燥方法对重塑膨润土压汞试验用土样的影响试验研究[J].岩土力学,2011,32(Z1):388-0391. |
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| 作者姓名： | 张平 房营光 闫小庆 何智威 |
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| 作者单位： | 华南理工大学土木与交通学院;华南理工大学亚热带建筑科学国家重点实验室 |
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| 基金项目： | 亚热带建筑科学国家重点实验室自主项目(No.2008ZA11) |
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| 摘 要： | 采用风干法、烘干法和冻干法分别对不同含水率的重塑膨润土进行干燥制样,利用压汞试验得到的累积进汞量曲线,对重塑膨润土进行了孔隙尺度划分,根据测试结果对土样孔隙尺度分布特征进行了定量分析。试验结果表明:采用风干法、烘干法和冻干法干燥制样后土体孔隙分布存在较大的差异性,土样的含水率越高,差异越明显;风干法、烘干法干燥土样会引起孔隙收缩,导致土体微孔隙特征的变化,冻干法不会引起孔隙收缩,因而不会导致土体微孔隙特征的变化。由此得出了干燥重塑膨润土制备压汞试验用土样最好的干燥方法是冻干法这一结论。
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| 关 键 词： | 孔隙尺度 风干法 烘干法 冻干法 压汞试验 |
| 收稿时间： | 2010-08-16 |
Study of different dry methods for drying remolded bentonite sample with mercury intrusion test |
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| ZHANG Ping,FANG Ying-guang,YAN Xiao-qing,HE Zhi-wei.Study of different dry methods for drying remolded bentonite sample with mercury intrusion test[J].Rock and Soil Mechanics,2011,32(Z1):388-0391. |
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| Authors: | ZHANG Ping FANG Ying-guang YAN Xiao-qing HE Zhi-wei |
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| Institution: | 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China； 2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | The remolded bentonite samples with different water contents were prepared after drying with air dry method, drying method and freeze dry method. Their cumulative intrusion curves were obtained with mercury intrusion test. The division of pore scale for remolded bentonite samples were made according to the test result; then the quantitative analysis of pore criterion distribution characteristics was made according to the test result. The results show that the pore diameters and pore-scale distributions of soil prepared by air dry method, drying method and freeze dry method are great different. The higher of water content is, the more obvious difference is; the pore diameter of soil prepared by air dry method and drying method become small, causes the change of micropore characteristic; the pore diameter of soil prepared by freeze dry method does not become small, so does not cause the change of micropore characteristic. And the conclusion is drawn that the freeze dry method is the best method for drying remolded bentonite sample using mercury intrusion test. |
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| Keywords: | pore scale air dry method drying method freeze dry method mercury intrusion test |
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