西南交通大学学报2024，Vol.59Issue(6)：1497-1504,8.DOI:10.3969/j.issn.0258-2724.20220459
基于灰色关联理论的PP-SACC修复材料弯曲性能
Bending Properties of Polypropylene Fiber-Sulfoaluminate Cement-Based Repair Material Using Grey Relation Theory
摘要
Abstract
To improve the economic benefits of engineered cementitious composite(ECC)and control the repair cycle,the polypropylene fiber-sulfoaluminate cement-based(PP-SACC)repair materials were designed with polypropylene fiber featuring low cost and sulfoaluminate cement featuring fast hardening and early strength employed as the key components.The influence of water-binder ratio,fiber content,and aggregate size on the bending properties of the repair materials was explored.In addition,the grey relation model was used to comprehensively evaluate PP-SACC under all working conditions.The results indicate that the fiber content is the most important factor that affects the strength,toughness,and crack characteristics.The influence factors of fiber content on initial crack strength,toughness index,and average crack width are-0.68,0.79,and-0.98,respectively.The aggregate size can significantly affect the crack characteristics.The influence factor of quartz sand size on the average crack width is-0.86.The water-binder ratio also greatly affects the strength and toughness,and a reasonable water-binder ratio is beneficial to leverage the bridging effect of the fiber.The PP-SACC repair material has excellent toughness and flexural hardening properties.关键词
PP纤维-硫铝酸盐水泥基修复材料/弯曲延性/挠曲硬化/改进灰色关联分析Key words
polypropylene fiber-sulfoaluminate cement-based repair materials/bend ductility/flexural hardening/improved grey relation analysis分类
建筑与水利引用本文复制引用
崔圣爱,夏葳,徐李麟,张书豪,李固华..基于灰色关联理论的PP-SACC修复材料弯曲性能[J].西南交通大学学报,2024,59(6):1497-1504,8.基金项目
国家自然科学基金项目(52278277) （52278277）
四川省国际科技创新合作项目(2023YFH0061) （2023YFH0061）
四川省中央引导地方科技发展专项项目(2021ZYD0045) （2021ZYD0045）
成都市科技计划(2021-YF05-00138-SN) （2021-YF05-00138-SN）
中央高校基本科研业务费专项资金(2682021GF020) （2682021GF020）
