摘要
为优化工业废渣在软土固化中配置,选用磷石膏与矿渣替代部分水泥,通过无侧限抗压强度与海水浸泡试验对比分析初始含水率、工业废渣掺量、养护龄期及海水侵蚀对工业废渣-水泥固化土强度特性影响。结果表明:磷石膏-水泥固化土抗压强度随养护龄期延长而提高,随磷石膏掺量和初始含水率增加而降低;矿渣-水泥固化土抗压强度随养护龄期延长而提高,更适应较高初始含水率软土,随初始含水率及矿渣掺量先增加后减小。海水浸泡后,磷石膏-水泥固化试样因磷石膏掺量增加更易遭受侵蚀,表现为更严重的开裂现象与强度损失;矿渣-水泥固化软土更耐受海水侵蚀,各掺量下固化试样均未开裂,且海水浸泡导致的强度损失随矿渣掺量增加呈减小趋势。
To optimize the configuration of industrial waste slag in soft soil solidification,phosphogypsum and slag were selected to replace part of cement,and the effects of initial water content,industrial waste slag content,curing age and seawater erosion on the strength of industrial waste-cement solidified soil were compared by unconfined compressive strength and seawater immersion tests.The results show that the compressive strength of phosphogypsum-cement solidified soil increases with increasing curing age and decreases with phosphogypsum content and initial water content.The compressive strength of slag-cement solidified soil increases with the extension of curing age and is more suitable for soft soil with higher initial water content.It first increases and then decreases with the initial water content and slag content.The phosphogypsum-cement solidified sample after seawater immersion got more susceptible to erosion due to the increase in phosphogypsum content and showed more serious cracking and strength loss.The slag-cement solidified soil is more resistant to seawater erosion.The samples do not crack under each dosage,and the strength loss caused by seawater immersion decreases with increasing slag content.
作者
陈浩
CHEN Hao(CRCC Harbour&Channel Engineering Bureau Group General Contracting Company,Zhuhai,Guangdong 519000,China)
出处
《中国港湾建设》
2024年第3期44-50,共7页
China Harbour Engineering
关键词
磷石膏
矿渣
固化软土
强度特性
耐久性
phosphogypsum
slag
solidified soft soil
strength characteristics
durability
