| 建筑废渣-黏土混合料压实特性试验研究 |
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| 引用本文： | 张季如,胡 超,申泽辉,张程锋,廖传飞,李 璋.建筑废渣-黏土混合料压实特性试验研究[J].岩土力学,2016,37(Z2):349-355. |
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| 作者姓名： | 张季如 胡 超 申泽辉 张程锋 廖传飞 李 璋 |
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| 作者单位： | 武汉理工大学 土木工程与建筑学院，湖北 武汉 430070 |
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| 基金项目： | 国家自然科学基金（No.41272334）；中央高校基本科研业务费专项资金（No.2015-TJ-A1-01）。 |
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| 摘 要： | 将建筑废渣按一定比例与黏土掺合形成的渣土混合料用作填筑材料，具有显著的社会经济与环保效益。为了揭示渣土混合料的压实特性，利用击实试验研究渣料含量和初始级配对渣土混合料压实性能及颗粒破碎特性的影响。研究结果显示，与黏土相比，渣土混合料的最优含水率较低而最大干密度较高，尽管渣料的初始级配有所不同，渣土混合料的最优含水率随掺渣量的增加而减小，最大干密度随掺渣量的增加而先增后减，并存在着一个约为30%的最优掺渣量；击实作用下渣料颗粒的相对破碎率随掺渣量的增加而增加，与初始级配均匀的渣料相比，相同掺渣量下初始级配不均匀渣料的相对破碎率较小，但受渣料初始颗粒大小的影响不大；与初始较小颗粒渣料的混合料相比，初始较大颗粒渣料的混合料的最大干密度较大，表明宽级配的渣土混合料压实性能较好。渣土混合料的压实特性通过结合掺渣量、颗粒破碎特性与渣土混合料结构响应分析得到合理解释。
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| 关 键 词： | 建筑废渣 黏土 渣土混合料 击实试验 颗粒破碎 |
| 收稿时间： | 2016-03-07 |
Compaction test on construction waste slag-clay mixtures |
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| ZHANG Ji-ru,HU Chao,SHEN Ze-hui,ZHANG Cheng-feng,LIAO Chuan-fei,LI Zhang.Compaction test on construction waste slag-clay mixtures[J].Rock and Soil Mechanics,2016,37(Z2):349-355. |
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| Authors: | ZHANG Ji-ru HU Chao SHEN Ze-hui ZHANG Cheng-feng LIAO Chuan-fei LI Zhang |
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| Institution: | School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, Hubei 430070, China |
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| Abstract: | The slag-clay mixtures made of construction waste slag mixed with certain proportion clay have been used as filling materials, which have significantly social economy and environmental protection benefits. In order to reveal the compaction properties of slag-clay mixtures, a series of compaction tests are conducted to investigate the influence of the slag content and initial gradation on the behavior of compaction and particle breakage. The results show that the optimum moisture content is smaller for slag-clay mixtures than for clay, and the maximum dry density is larger for slag-clay mixture than for clay. As the slag content increases, for the slag-clay mixtures the optimum moisture content increases, and the maximum dry density increases firstly and then decreases. Therefore there exists the optimum slag content of 30% in the slag-clay mixtures despite the different initial gradation of slag. The relative breakage of slag particles increases with slag content during the compaction. The relative breakage is greater for uniformly graded than for well-graded slag, but is not much affected by the initial particle size of slag at the same slag content. The maximum dry density is greater for larger size than for smaller size particles of slag, which leads to well compaction of wide-graded slag-clay mixtures. The compaction properties of slag-clay mixtures are explained by linking the structural response of slag-clay mixtures with the slag content and behavior of particle breakage. |
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| Keywords: | construction waste slag clay slag-clay mixtures compaction test particle breakage |
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