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刘 霖,张永鹏,陈晨. 有机污染土固化强度及电阻率特性[J]. 科学技术与工程, 2020, 20(10): 4178-4182.
liulin,zhangyongpeng,chenchen.Curing strength and electrical resistivity of soil contaminated by organic substances[J].Science Technology and Engineering,2020,20(10):4178-4182.
有机污染土固化强度及电阻率特性
Curing strength and electrical resistivity of soil contaminated by organic substances
投稿时间:2019-07-13  修订日期:2019-11-02
DOI:
中文关键词:  有机物污染  固化土 电阻率  无侧限抗压强度 拟合方程
英文关键词:organic  pollutant solidified  soil electrical  resistivity unconfined  compressive strength  fitting equation
基金项目:
        
作者单位
刘 霖 内蒙古工业大学土木工程学院,内蒙古自治区土木工程结构与力学重点实验室
张永鹏 内蒙古工业大学土木工程学院
陈晨 内蒙古工业大学土木工程学院
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中文摘要:
      为揭示污染物含量及养护龄期对水泥固化有机物污染土的影响,以腐殖酸、风积沙及水泥模拟固化污染土,通过一系列室内试验,分析其无侧限抗压强度及电阻率的变化规律。研究发现:固化污染土电阻率及抗压强度随污染物含量增大而减小,随养护龄期增大而增大;电阻率与污染物含量及养护龄期分别呈良好的三次函数与对数函数关系;固化土抗压强度随电阻率增大而增大,呈现明显的相关关系,利用二次函数拟合,效果较好。可见固化污染土电阻率及无侧限抗压强度与腐殖酸含量的相关性,主要由于腐殖酸有较强吸水性,使得孔隙增加,以及有机物中主要官能团中H+与水泥水化反应产物碱性阳离子(Ca2+、Al3+)进行交换,产物包裹水泥颗粒,抑制水泥水化反应。
英文摘要:
      To reveal the effect of pollutant content and age on cement solidified contaminated soil by organic substances, solidified soil made with water, humic acid, aeolian sand and cement is to be tested its unconfined compressive strength and electrical resistivity in order to analyze their relationship with the content of pollutants and age by a series of laboratory tests. The results show that the electrical resistivity and unconfined compressive strength of solidified soil decreasing with the increase of pollutant content increase with the increasing of age. There is a cubic polynomial relationship between electrical resistivity and content of pollutants, logarithmic function between electrical resistivity and age. The compressive strength of solidified soil increases with increasing of the electrical resistivity, and the effect is good to use quadratic function to fit the data. The correlation between the electricity resistivity, the unconfined compressive strength and the contaminant content mainly dues to the strong water absorption of the humic acid, which increases the pores, and the exchange of H+ with the main cations(Ca2+, Al3+) of the cement hydration reaction products in the main functional groups of organic pollutants, and the product encapsulates the cement particles to inhibit the cement hydration reaction.
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