| 湿陷性粉质黏土的组成成分及细观特征 |
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| 引用本文： | 尧俊凯.湿陷性粉质黏土的组成成分及细观特征[J].铁道建筑,2019(2):46-49. |
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| 作者姓名： | 尧俊凯 |
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| 作者单位： | 中国铁道科学研究院 |
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| 基金项目： | 中国铁道科学研究院基金(2016YJ039;2017YJ030) |
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| 摘 要： | 针对具有湿陷性的粉质黏土,通过X衍射矿物成分分析、扫描电镜分析等方法,研究湿陷性粉质黏土的组成成分、细观形貌以及微区成分。结果表明:湿陷性粉质黏土与湿陷性黄土具有相似的矿物组成成分;粉质黏土颗粒间被钙质絮状包裹物胶结,浸水后剥落导致土骨架间胶结程度降低,胶结强度减弱,使得骨架颗粒脱离约束而重新排列,宏观上表现为湿陷变形的特性。
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| 关 键 词： | 湿陷特性 粉质黏土 试验研究 矿物成分 细观结构分析 |
Composition and Microstructure Features of Collapsible Silty Clay |
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| YAO Junkai.Composition and Microstructure Features of Collapsible Silty Clay[J].Railway Engineering,2019(2):46-49. |
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| Authors: | YAO Junkai |
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| Institution: | (China Academy of Railway Sciences,Beijing 100081,China) |
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| Abstract: | Microstructure and composition of collapsible silty clay were studied by means of X diffraction mineral composition analysis and scanning electron microscope analysis.The experimental results show that the collapsible silty clay and collapsible loess have similar mineral composition.The particles of silty clay are cemented by calcium floc inclusions.After immersion,the spalling of calcium floc inclusions between soil skeletons may result in weakening of cementation extent and cementation strength.Therefore,the skeleton particles are released from the constraint and the rearrangement causes collapsible deformation in macro scale. |
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| Keywords: | Collaps characteristics Silty clay Experimental research Mineral composition Microstructure analysis |
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