硅酸盐通报2025，Vol.44Issue(5)：1939-1948,10.DOI:10.16552/j.cnki.issn1001-1625.2024.1239
聚丙烯纤维协同碳化养护技术改性水泥土的抗剪特性研究
Shear Strength Characteristics of Cement Soil Modified with Polypropylene Fiber and Carbonation Curing Technology
摘要
Abstract
In this study,the effect of polypropylene fiber(PPF)collaborative carbonation curing technology on the 7 d shear strength and failure mode of cement soil was discussed.The shear properties and carbon sequestration characteristics of cement soil with different PPF content and different curing conditions were tested by triaxial shear test,phenolphthalein method and thermogravimetric analysis.The results show that under the standard curing condition,the shear strength of cement soil increases with the increase of PPF content,and reaches the maximum value of 2 174 kPa when the fiber content is 0.9％(mass fraction).Under the carbonation curing condition,the shear strength of cement soil increases first and then decreases with the increase of fiber content,and reaches the maximum value of 4 477 kPa when the fiber content is 0.6％.Compared with standard curing,carbonation curing has a certain improvement effect on cohesive force,but the improvement effect on internal friction angle is more significant,and the internal friction angle is less affected by fiber content.The average carbonization depth of the sample cured for 7 d is 0.85 mm,and the carbon sequestration amount is 2.5％(mass fraction).关键词
水泥土/聚丙烯纤维/碳化养护/抗剪强度/破坏形态/固碳量Key words
cement soil/polypropylene fiber/carbonation curing/shear strength/failure mode/carbon sequestration amount分类
建筑与水利引用本文复制引用
孔爱散,钱锶嘉,王伟,马绪坤,李娜..聚丙烯纤维协同碳化养护技术改性水泥土的抗剪特性研究[J].硅酸盐通报,2025,44(5):1939-1948,10.基金项目
国家自然科学基金(41772311) （41772311）
