山东大学学报 (工学版) ›› 2024, Vol. 54 ›› Issue (4): 122-130.doi: 10.6040/j.issn.1672-3961.0.2023.192
孙悦1,张文亮2,张建鹏3*,王蕾4,李鹏1,杨飞宇1,何灵垚1
SUN Yue1, ZHANG Wenliang2, ZHANG Jianpeng3*, WANG Lei4, LI Peng1, YANG Feiyu1, HE Lingyao1
摘要： 为研究硫酸根离子侵蚀效应对钙质砂吹填岛礁注浆加固钙质砂地基服役性能的影响,采用耦合温度和离子浓度的加速侵蚀方法,基于海水侵蚀试验装置开展不同水泥类型、侵蚀时间、水灰比条件下硫酸根离子对于注浆结石体性能的弱化试验。获得海水中硫酸根离子对注浆结石体力学性能及渗透性能的影响规律,并对侵蚀后的注浆结石体进行微观测试,揭示硫酸根离子对钙质砂注浆结石体的侵蚀弱化机理。试验结果表明,硫酸根离子渗透注浆结石体内部与水化反应产物发生反应生成石膏以及钙矾石等产物引发注浆结石体发生侵蚀破坏,而动水环境会加剧硫酸根离子对注浆结石体的侵蚀弱化效应,动水侵蚀组结石体在侵蚀时间为3.28 a时,抗压强度为5.41 MPa,较淡水对照组降低23.9%;渗透系数为7.159×10-5 cm/s,较淡水对照组增大6.691×10-5 cm/s。
中图分类号:
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