流态固化土水泥剂量EDTA滴定法检测影响因素分析  

Analysis of influencing factors on EDTA titration method in detecting cement dosage for fluid solidified soil

作　　者：罗義錬 罗强[1] 蒋良潍[1] 张良[1] 胡秋辉 覃李兵 LUO Yilian;LUO Qiang;JIANG Liangwei;ZHANG Liang;HU Qiuhui;QIN Libing(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Sichuan Mingyang Construction Engineering Management Co.,Ltd.,Chengdu 610017,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省名扬建设工程管理有限公司,四川成都610017

出　　处：《大连理工大学学报》2025年第1期79-88,共10页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(52078435).

摘　　要：水泥剂量是控制流态固化土强度的关键指标,工程中多采用EDTA滴定法进行检测,但流态固化土制备过程中含水量与水泥水化时间偏差会导致检测数据失真.研究了EDTA二钠标准溶液消耗量随水泥剂量、含水量和水化时间三因素的变化规律;基于回归正交试验,开展了多因素及交互影响的主次关系分析与显著性评价,建立了考虑三因素综合影响的EDTA二钠标准溶液消耗量回归方程.试验表明,EDTA二钠标准溶液消耗量与水泥剂量近似呈线性正相关,随含水量增大或水化时间延长近似线性降低;影响因素主次顺序为水泥剂量、含水量、水化时间,交互作用不显著;因素水平在回归正交试验组范围内,回归方程计算值误差低于2.40%;含水量或水化时间分别偏差2.9%、86min,将造成水泥剂量检测值增减约0.5%.研究成果可为完善流态固化土水泥剂量检测技术提供参考.Cement dosage is the key index for controlling the strength of fluid solidified soil,and EDTA titration method is mostly used for detection in the project,but the deviation of water content and cement hydration time in the process of fluid solidified soil preparation will lead to the distortion of detection data.The change rule of the consumption of EDTA disodium standard solution with the three factors of cement dosage,water content and hydration time is investigated;based on the regression orthogonal test,the analysis of the primary and secondary relationship and the significance evaluation of the multi-factors and interactive effects are carried out,and the regression equation of the consumption of EDTA disodium standard solution with the consideration of the comprehensive effects of the three factors is established.The test shows that the consumption of EDTA disodium standard solution is approximately linearly positively correlated with cement dosage,and approximately linearly decreases with the increase of water content or the extension of hydration time;the primary and secondary order of influencing factors is cement dosage,water content,hydration time,and the interaction is not significant;the factor level is within the range of regression orthogonal test group,and the error of the calculated value of the regression equation is lower than 2.40%;the deviation of water content or hydration time is 2.9%,86 min,respectively,which will result in an increase or decrease of about 0.5%in the cement dosage detection value.The research results can provide a reference for improving the cement dosage detection technology of fluid solidified soil.

关 键 词：流态固化土 水泥剂量 EDTA滴定法 回归正交试验 因素主次关系 

分 类 号：TU521.3[建筑科学—建筑技术科学]