冻融环境下SFCB与玻璃纤维膨胀剂增强海水海砂混凝土力学和粘结性能研究  

Study on the mechanical and bonding properties of SFCB and glass fiber expansive agent reinforced seawater sea⁃sand concrete under freezing⁃thawing environment

作　　者：李钢粮 简嘉宇 宋钰莹 李海燕 周振 魏伟 熊哲[2] 武念铎 LI Gangliang;JIAN Jiayu;SONG Yuying;LI Haiyan;ZHOU Zhen;WEI Wei;XIONG Zhe;WU Nianduo(Guangdong Yonghe Construction Group Co.,Ltd.,Guangzhou 510330,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China;School of Civil Engineering,Guangdong Construction Polytechnic,Qingyuan 511500,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China)

机构地区：[1]广东永和建设集团有限公司,广州510330 [2]广东工业大学土木与交通工程学院,广州510006 [3]广东建设职业技术学院土木工程学院,清远511500 [4]中国建筑第八工程局有限公司,上海200135

出　　处：《建筑结构》2025年第5期62-70,共9页Building Structure

基　　金：国家自然科学基金项目(12002091);广东省自然科学基金(2024B1515020028);广东省教育厅特色创新项目(2021KTSCX211);广东永和建设集团有限公司-广东工业大学产学研合作项目(23HK0171)。

摘　　要：钢-纤维聚合物复合筋(SFCB)与海水海砂混凝土的结合应用可以合理地解决钢筋腐蚀和资源短缺这两个关键问题,同时玻璃纤维与膨胀剂能提高混凝土的抗裂性与抗渗性。然而,SFCB与复合海水海砂混凝土在冻融环境中的耐久性还有待研究,因此设计了不同的混凝土配合比,以研究玻璃纤维与膨胀剂对海水海砂混凝土抗冻性能的影响。通过偏心拉拔试验探究SFCB与不同配合比的海水海砂混凝土在冻融环境下的粘结性能。结果表明,掺入适量的玻璃纤维与膨胀剂可以有效提高海水海砂混凝土的抗冻粘结性,降低混凝土的抗压强度损失率、动弹性模量损失率和质量损失率,对粘结强度和粘结刚度的冻融退化具有抑制效果。The combined application of steel⁃fiber polymer composite bars(SFCB)and seawater sea⁃sand concrete can reasonably solve the two key problems of steel bar corrosion and resource shortage.At the same time,glass fiber and expansive agent can improve the crack resistance and impermeability of concrete.However,the durability of SFCB and composite seawater sea⁃sand concrete in freezing⁃thawing environment remains to be studied.Therefore,different concrete mix ratios were designed to study the effect of glass fiber and expansive agent on the frost resistance of seawater sea⁃sand concrete.The bonding properties of SFCB and seawater sea⁃sand concrete with different mix ratios in freezing⁃thawing environment were investigated by eccentric pull⁃out test.The results show that the incorporation of appropriate amount of glass fiber and expansive agent can effectively improve the frost resistance of seawater sea⁃sand concrete,reduce the compressive strength loss rate,dynamic elastic modulus loss rate and mass loss rate of concrete.It has an inhibitory effect on the freezing⁃thawing degradation of bond strength and bond stiffness.

关 键 词：玻璃纤维 膨胀剂 海水海砂混凝土 钢-纤维聚合物复合筋 粘结性能 冻融环境 

分 类 号：TU375[建筑科学—结构工程]