水泥和钢渣粉协同固化高含水率疏浚泥的力学性能研究  

Study on mechanical properties of cement and steel slag powder synergistic solidification of dredged mud with high moisture content

作　　者：张丹[1] 邱成春[1] 王俊炜 曹冬惠 姚达 ZHANG Dan;QIU Chengchun;WANG Junwei;CAO Donghui;YAO Da(School of Civil Engineering,Yancheng Institute of Technology,Yancheng 224051,China;Yancheng ArchitecturalDesign&Research Institute Co.,Ltd.,Yancheng 224007,China;Jiangsu Hongji Water Technology Co.,Ltd.,Yangzhou 225100,China)

机构地区：[1]盐城工学院土木工程学院,江苏盐城224051 [2]盐城市建筑设计研究院有限公司,江苏盐城224007 [3]江苏鸿基水源科技股份有限公司,江苏扬州225100

出　　处：《混凝土与水泥制品》2024年第6期115-119,共5页China Concrete and Cement Products

基　　金：江苏省产学研合作项目(BY20221035);江苏南水北调科技研发项目(JSNSBD202106);江苏省水利科技项目(2020012)。

摘　　要：研究了钢渣粉的掺入方式(内掺、外掺)和掺量(0、5%、10%、15%)对水泥固化高含水率疏浚泥力学性能的影响。结果表明:当水泥掺量一定时,随着钢渣粉外掺量的增加,固化疏浚泥的3、7、14、28、90 d无侧限抗压强度均先增大后减小,14 d峰值应力和峰值应变也呈先增大后减小的趋势,钢渣粉的最佳外掺量为10%;对于纯水泥固化疏浚泥,其变形系数随着水泥掺量的增加而增大,抵抗变形的能力降低;外掺适量钢渣粉降低了固化疏浚泥的变形系数,提高了固化疏浚泥抵抗变形的能力;钢渣粉内掺取代部分水泥降低了固化疏浚泥的无侧限抗压强度,建议钢渣粉采用外掺方式。The influence of the mixing method(internal and external)and content(0,5%,10%,15%)of steel slag powder on the mechanical properties of cement solidified dredged mud with high moisture content was studied.The results show that when the cement content is constant,with the increase of external content of steel slag powder,the unconfined compressive strength of solidified dredged mud at 3 d,7 d,14 d,28 d,and 90 d first increases and then decreases,the peak stress and peak strain at 14 d also show a trend of first increasing and then decreasing,and the optimal external content of steel slag powder is 10%.For pure cement solidified dredged mud,its deformation coefficient increases with the increase of cement content,and its ability to resist deformation decreases.Adding an appropriate external content of steel slag powder reduces the deformation coefficient of solidified dredged mud and improves its ability to resist deformation.Replacing some cement with steel slag powder reduces the unconfined compressive strength of solidified dredged mud.It is recommended to use the external mixing method for steel slag powder.

关 键 词：水泥 钢渣粉 疏浚泥 协同固化 无侧限抗压强度 变形系数 

分 类 号：TU528.0[建筑科学—建筑技术科学]