文献类型：期刊文献

中文题名：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

英文题名：Shear Strength Characteristics of Cement Soil Modified with Polypropylene Fiber and Carbonation Curing Technology

作者：孔爱散[1];钱锶嘉[2];王伟[2];马绪坤[2];李娜[2]

机构：[1]绍兴职业技术学院建筑与设计艺术学院,绍兴312000;[2]绍兴文理学院土木工程学院,绍兴312000

年份：2025

卷号：44

期号：5

起止页码：1939

中文期刊名：硅酸盐通报

外文期刊名：Bulletin of the Chinese Ceramic Society

收录：北大核心2023、、北大核心

基金：国家自然科学基金(41772311)。

语种：中文

中文关键词：水泥土;聚丙烯纤维;碳化养护;抗剪强度;破坏形态;固碳量

外文关键词：cement soil;polypropylene fiber;carbonation curing;shear strength;failure mode;carbon sequestration amount

中文摘要：本研究探讨了聚丙烯纤维(PPF)协同碳化养护技术对水泥土7 d抗剪强度及破坏形态的影响。通过三轴剪切试验、酚酞法及热重分析,对不同PPF掺量和不同养护条件下的水泥土进行了剪切性能和固碳特性测试。结果表明,在标准养护条件下,水泥土的抗剪强度随着纤维掺量的增加呈增加趋势,在纤维掺量为0.9%(质量分数)时达到最大值2 174 kPa。在碳化养护条件下,水泥土的抗剪强度随着纤维掺量的增加先提高后降低,在纤维掺量为0.6%时达到最大值4 477 kPa。与标准养护相比,碳化养护对黏聚力有一定的提升效果,但对内摩擦角的提升效果更显著,且内摩擦角受纤维掺量的影响较小。碳化养护7 d的试样平均碳化深度为0.85 mm,固碳量为2.5%(质量分数)。

外文摘要：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 2174 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 4477 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).