掺磷尾矿的海淤固化土路堤强度影响因素研究  

A Study on Factors Influencing Strength of Cement-Solidified Sea Silt Road Embankment Adding Phosphate Tailing

作　　者：赵晓晴[1] 张永宏[1] 李明东[1] 孙耀东[1] 

机构地区：[1]江苏连云港淮海工学院土木工程学院,连云港市222005

出　　处：《公路》2012年第11期71-75,共5页Highway

基　　金：江苏建设厅项目;项目编号JS2008JH01;连云港市科学技术局科技项目;项目编号SH09122

摘　　要：以疏浚海淤泥为研究对象,水泥为固化剂,掺入连云港当地固体废弃物磷尾矿砂,达到改善海淤泥工程性质、缩短建设周期、保护环境的目的。采用2因素(水泥添加量和磷尾矿砂掺量)5水平均匀试验确定了不同的配比,利用无侧限抗压强度试验,研究无侧限抗压强度的影响因素,从水稳定性和CBR值两个方面证明,提高磷尾矿砂掺量对海淤固化土强度有促进作用。在试验和理论的基础上提出掺磷尾矿砂海淤固化土的强度公式,并进行回归,固化土存在最小的水泥需要量。Dredged sea silt is solidified by cement, adding phosphate tailing of Lianyungang solid waste, which can not only improve the mechanical properties of sea silt, but also shorten the construction period and protect environment. Based on uniform experimental design method considering the factors（ce- ment content and phosphate tailing content） ,at 5 design level, the different mix proportion are defined. U- tilizing unconfined compression strength test, the influence factors about strength are studied. From the aspects of water stability and CBR, the phosphate tailing mixing ratio increasing can effectively improve the strength of solidified sea silt under a certain amount of mixed cement. On the basis of theories and tests, the strength formula is carried out. Cement-solidified sea silt adding phosphate tailing exists the minimum cement requirement.

关 键 词：磷尾矿砂 海淤固化土 无侧限抗压强度 软化系数 CBR 配方 

分 类 号：U414.101[交通运输工程—道路与铁道工程]