污水浸泡对水泥土强度和电阻率特性影响的试验研究

›› 2014, Vol. 35 ›› Issue (7): 1855-1862.

污水浸泡对水泥土强度和电阻率特性影响的试验研究

董晓强^{1, 2}，苏楠楠¹，黄新恩³，白晓红¹

1. 太原理工大学建筑与土木工程学院，太原 030024；2. 太原理工大学煤科学与技术教育部和山西省重点实验室，太原 030024；3. 中北大学理学院，太原 030051

收稿日期:2013-05-06 出版日期:2014-07-10 发布日期:2014-07-11
作者简介:董晓强，男，1974年生，博士，副教授，主要从事岩土工程方面的研究工作
基金资助:
国家自然科学基金资助项目(No. 51078254，No. 51078253)；中韩合作交流项目NSFC-NRF(No. 51211140344)；教育部新世纪优秀人才支持计划(No. NCET-12-1039)；山西省高等学校优秀青年学术带头人支持计划。

Effect of sewage on electrical resistivity and strength of cemented soil

DONG Xiao-qiang^{1, 2}，SU Nan-nan¹，HUANG Xin-en³，BAI Xiao-hong¹

1. College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China; 3. College of Science, North University of China, Taiyuan 030051, China

Received:2013-05-06 Online:2014-07-10 Published:2014-07-11

摘要/Abstract

摘要： 为了揭示污水对水泥土的影响规律，并尝试采用电阻率法作为描述强度和污染特征的手段，把粉质黏土和两种水泥（普通硅酸盐水泥、矿渣硅酸盐水泥）制作的水泥土试块分别浸泡在3种液体（自来水、生活污水、造纸厂污水）中模拟环境侵蚀。首先对比分析了污水对土体液塑限的影响，其次研究了龄期、水泥类型、污水类型等对水泥土抗压强度和电阻率的影响，考察了电阻率和抗压强度的关系。结果表明：污染后土样的液限、塑限均增大，塑性指数减小；水泥土抗压强度和电阻率均随龄期增加而增长；污水均降低了水泥土的抗压强度和电阻率，但是矿渣硅酸盐水泥土的抗压强度和电阻率均高于普通硅酸盐水泥土，说明在污水环境中，矿渣水泥对水泥土有一定的抗劣化能力；在不同的龄期、水泥类型、污水类型下，水泥土电阻率均与抗压强度呈现出一致的变化规律，二者线性相关。

关键词: 污水, 水泥土, 电阻率, 无侧限抗压强度

Abstract: To expose the deterioration rule of cemented soil eroded by sewage, soaking the cemented soil blocks made of two types of cement (ordinary Portland cement, slag Portland cement) and silty clay in three different solutions (tap water, domestic sewage and industrial sewage), the laboratory experiments were conducted. First, the effect of sewage on liquid-plastic limit of soil was described. Second, the influence of curing age, cement type and sewage type on compressive strength and electrical resistivity of cemented soil were discussed. Then, the relationship between electrical resistivity of cemented soil and compressive strength was analyzed. The results show that: After contaminated by sewage, the liquid-plastic limit of soil increases; whereas the plasticity index decreases; the compressive strength and electrical resistivity increase with increasing curing age; the sewage reduces the compressive strength and the resistivity of the cemented soil; however, the compressive strength and electrical resistivity of slag Portland cemented soil are higher than that of the ordinary Portland cemented soil; therefore slag Portland cement can improve the ability of resistance to degradation. Under different curing ages, no matter what type of cement and sewage, the electrical resistivity and compressive strength of the cemented soil vary follow the same rule. The relationship between electrical resistivity and compressive strength is linear.

Key words: sewage, cemented soil, electrical resistivity, unconfined compressive strength

中图分类号:

TU 411

董晓强，苏楠楠，黄新恩，白晓红,. 污水浸泡对水泥土强度和电阻率特性影响的试验研究[J]. , 2014, 35(7): 1855-1862.

DONG Xiao-qiang ，SU Nan-nan ，HUANG Xin-en ，BAI Xiao-hong,. Effect of sewage on electrical resistivity and strength of cemented soil[J]. , 2014, 35(7): 1855-1862.

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