电石渣改良过湿黏土的物理力学试验研究

覃小纲; 杜延军; 刘松玉; 魏明俐; 张莹莹

电石渣改良过湿黏土的物理力学试验研究 English Version

1. 东南大学岩土工程研究所，江苏南京 210096；2. 云南省交通规划设计院，云南昆明 650011

基金项目: 国家自然科学基金项目（51278100）；江苏省自然科学基金项目（BK2012022）；江苏省交通科技项目（08Y30）

详细信息

作者简介:
覃小纲(1984- )，男，博士研究生，主要从事地基和地下工程的研究。E-mail: xiaogang.qin2008@gmail.com。

中图分类号: TU411
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出版历程
- 收稿日期: 2013-03-01
- 发布日期: 2013-07-18

Experimental study on physical and mechanical properties of over-wet clayey soils stabilized by calcium carbide residues

1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 2.Yunnan Provincial Transportation Planning and Design Institute, Kunming 650011, China

摘要

摘要: 将工业废料电石渣用于高速公路路基的过湿黏土填料改良。通过含水率、颗分、击实、无侧限抗压强度、回弹模量和干湿循环等室内试验，研究了不同掺量及龄期下，电石渣改良土的基本物理力学性质和水稳性，并与生石灰改良土进行对比。结果表明：电石渣较生石灰比表面积更大、pH更高，在相同掺量和养护条件下，电石渣改良土较生石灰改良土的物理性能改善更明显，粗颗粒含量、最大干密度和最佳含水率都更高，塑性指数更小；电石渣改良土的路用强度指标包括无侧限抗压强度、CBR、回弹模量均优于生石灰改良土。电石渣改良土的水稳定性随掺量的增加而提高，耐干湿性能明显优于生石灰改良土；养护龄期对耐久性的影响不显著。
- 电石渣 /
- 过湿黏土 /
- 物理性质 /
- 强度特性 /
- 水稳性
Abstract: The calcium carbide residue (CCR) is utilized to improve the over-wet clayey soils, which is used as subgrade materials in highway construction. A series of laboratory tests on moisture content, particle distribution, compaction, unconfined compression strength, modulus of resilience and wetting-drying cycle are carried out to study the mechanical properties of CCR-stabilized soils and lime-stabilized soils. The binder dosages are 4%, 6%, 8%, and 4%, 6% for CCR and lime respectively. The results indicate that the CCR has higher specific surface area, pH and fine particle content. Accordingly, the CCR-stabilized soils have greater physical performance than the lime-stabilized soils in terms of particle size distribution, plasticity index, the maximum dry density and the optimum moisture content. Additionally, the mechanical performance of CCR-stabilized soils is greater than that of the lime-stabilized soils, including the unconfined compressive strength, CBR, modulus of resilience and water durability.
- calcium carbide residue /
- over-wet clay /
- physical property /
- strength characteristic /
- water stability

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参考文献(1)

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