废弃贝壳部分替代水泥作为软土固化剂的强度特性研究  

Research on the Strength Characteristics of Partially Replacing Cement with Discarded Shells as a Stabilizer for Soft Soil

作　　者：闫红民 倪晓雯 陈吉星 王法鑫 YAN Hong-min;NI Xiao-wen;CHEN Ji-xing;WANG Fa-xin(Jiangsu Fangyang Group Co.,Ltd.,Lianyungang 222000,China;China Communications Tianjin Dredging Co.,Ltd.,Tianjin 300302,China;Lianyungang Xuwei Port Holding Group Co.,Ltd.,Lianyungang 222066,China;School of Harbor,Coastal&Offshore Engineering,Hohai University,Nanjing 210000,China)

机构地区：[1]江苏方洋集团有限公司,江苏连云港222000 [2]中交天津航道局有限公司,天津300302 [3]连云港徐圩港口控股集团有限公司,江苏连云港222066 [4]河海大学港口海岸与近海工程学院,江苏南京210000

出　　处：《中国市政工程》2025年第2期86-89,148,149,共6页China Municipal Engineering

基　　金：江苏省交通运输科技项目(2022Y13)。

摘　　要：贝壳中含有约95%的CaCO_(3),为探究废弃贝壳资源可否部分替代土壤固化剂中的水泥成分,针对采用贝壳粉部分替代海相软土固化剂中的水泥成分对固化土强度的影响程度问题开展研究。该研究基于室内试验方法,制备了不同贝壳粉替代率下的固化土样,采用无侧限抗压强度试验研究贝壳粉在以水泥为主固化剂的固化过程中的作用和表现。结果表明:贝壳粉替代率的变化对强度的影响是水泥与贝壳粉掺量协同作用的结果,贝壳粉对强度的影响以抑制作用为主,在较高水泥掺量和较低贝壳替代率下转变为积极作用。Shells contain approximately 95%CaCO_(3).To explore whether waste shell powder can partially replace cement in soil stabilizers,a study was conducted on the impact of using shell powder to partially replace cement in marine soft soil stabilizers on the strength of stabilized soil.Based on laboratory testing methods,soil samples stabilized with different shell powder replacement rates were prepared,and the role and performance of shell powder in the stabilization process using cement as the main stabilizer were investigated through unconfined compressive strength tests.The results indicate that the effect of shell powder replacement rate on strength is the result of the combined action of cement and shell powder content.The influence of shell powder on strength is mainly inhibitory,but it becomes positive under higher cement content and lower shell replacement rates.

关 键 词：废弃贝壳粉 疏浚土 地基处理 无侧限抗压强度 

分 类 号：TU528.04[建筑科学—建筑技术科学]