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粉煤灰-脱硫石膏复合水泥土渗透性试验研究
作者:莫奕新,庞建勇,黄金坤,王贤昆
(安徽理工大学 土木建筑学院,安徽 淮南 232001)
摘要:通过正交试验方法,研究了水泥掺量、脱硫石膏掺量、粉煤灰掺量、水灰比对水泥土渗透性的影响;运用灰色关联度分析和分层分析分别得到4种变量对水泥土渗透性的影响顺序及影响占比率。结果表明:4种因素对土体渗透性影响程度依次为水灰比>粉煤灰掺量>水泥掺量>脱硫石膏掺量,其中水灰比占55.79%,粉煤灰掺量占26.34%,水泥掺量占12.18%,脱硫石膏占5.69%,最优配比为水泥掺量14%、粉煤灰掺量3%、脱硫石膏掺量2%、水灰比为0.4,最优配比水泥土渗透系数随龄期变化拟合公式为:y=16.24x-1.025。
关键词:复合水泥土;粉煤灰;脱硫石膏;灰色关联度;分层分析
中图分类号:TU41 文献标识码:A 文章编号:1001-702X(2018)01-0122-04
Experimental study on permeability of fly ash desulphurization gypsum composite cement soil
MO Yixin,PANG Jianyong,HUANG Jinkun,WANG Xiankun
(College of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)
MO Yixin,PANG Jianyong,HUANG Jinkun,WANG Xiankun
(College of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)
Abstract:Through orthogonal test method,the influence of cement content,desulfurization gypsum content,fly ash content and water cement ratio on soil permeability was studied;The effect order and effect ratio of four variables on the permeability of cement-soil were obtained by grey correlation analysis and stratification analysis respectively. The results show that:the influence degree of four factors on the permeability of soil is water cement ratio>fly ash content>cement content>desulphurization gypsum content and the water cement ratio accounted for 55.79%,the fly ash content accounted for 26.34%,cement content accounted for 12.18%,desulphurized gypsum content accounted for 5.69%;the optimal ratio for the composite cement soil is 14% of cement content,3% of fly ash content,2% of desulphurization gypsum content,and water cement ratio is 0.4. The fitting formula of the optimum ratio of permeability coefficient of cement soil with age is as follows:y=16.24x-1.025.
Key words:composite cement soil,fly ash,desulphurization gypsum,grey correlation,stratification analysis
Key words:composite cement soil,fly ash,desulphurization gypsum,grey correlation,stratification analysis