张建伟,赵聪聪,尹悦,边汉亮,石磊

• 1:河南大学土木建筑学院
• 2:开封市特殊土改性与修复工程技术研究中心

摘要(Abstract)：

粉土是路基工程中常见的土体填料，其结构性差，在硫酸盐侵蚀环境下易受到侵蚀.为改善粉土的抗硫酸盐侵蚀性能，采用木质素磺酸钙来加固土体，通过无侧限抗压强度与抗硫酸盐侵蚀试验，分析木质素磺酸钙掺量、养护龄期和硫酸盐环境下浸泡天数对改良粉土无侧限抗压强度的影响.结果表明：改良粉土的无侧限抗压强度随木质素磺酸钙掺量的增加先增大后减小，随养护龄期的增长逐渐提高.其他条件相同下，当掺量为5%养护龄期为28 d时，试样的无侧限抗压强度最大为394.6 kPa,是未处理粉土的5.46倍.同时，此时改良粉土的抗硫酸盐侵蚀性能最好，在硫酸盐环境下浸泡28 d后改良粉土的无侧限抗压强度是侵蚀后素粉土的4.9倍.SEM试验结果表明，掺入适量木质素磺酸钙可对土体内部孔隙进行填充，使土体强度、抗硫酸盐侵蚀性能增强.

关键词(KeyWords)： 木质素磺酸钙;粉土;无侧限抗压强度;硫酸盐侵蚀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51508163);; 河南省高等学校青年骨干教师培养计划(2019GGJS041);; 河南省研究生教育改革与质量提升工程项目(YJS2021JD13)

作者(Author): 张建伟,赵聪聪,尹悦,边汉亮,石磊

DOI: 10.15991/j.cnki.411100.2023.05.010

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