硫酸盐干湿循环下玄武岩纤维混凝土抗侵蚀研究  

Research on corrosion resistance of basalt fiber reinforced concrete under sulfate wet dry cycle

作　　者：蓝磊[1] 张凯 何兴 刘鸿源 LAN Lei;ZHANG Kai;HE Xing;LIU Hongyuan(Guangxi University of Finance and Economics,Nanning 530003,China;Institute of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Sichuan Highway Planning,Survey,Design and Research Institute Ltd.,Chengdu 610041,China)

机构地区：[1]广西财经学院,广西南宁530003 [2]华南理工大学土木与交通学院,广东广州510640 [3]广西大学土木建筑工程学院,广西南宁530004 [4]四川省公路规划勘察设计研究院有限公司,四川成都610041

出　　处：《混凝土》2024年第6期25-29,共5页Concrete

基　　金：国家自然科学基金(52078219)。

摘　　要：以玄武岩纤维混凝土为研究对象,开展了不同硫酸盐浓度下干湿循环侵蚀试验,重点研究抗压强度、劈裂抗拉强度、相对动弹性模量及质量变化随干湿循环周次的变化规律及不同玄武岩纤维掺量对侵蚀劣化程度的影响。试验结果表明:干湿循环下硫酸盐浓度对不同纤维体积掺量的混凝土性能侵蚀劣化影响显著。随着硫酸盐浓度的增大,在干湿循环条件下抗压强度、劈裂抗压强度和质量变化曲线均由近似线性增长逐渐演化为“锅盖状”的先增后减,最大值对应的干湿循环周次为30,相对动弹性模量则由“躺L型”演变为“躺S型”;适量纤维的掺入可有效提高混凝土致密性,削弱硫酸盐侵蚀对混凝土性能劣化的影响。Taking basalt fiber concrete as the research object,it carried out dry wet cyclic erosion tests under different sulfate concentrations,focusing on the variation law of compressive strength,splitting tensile strength,relative dynamic elastic modulus and quality change with dry wet cycles,and the influence of different basalt fiber content on the erosion deterioration process.The test results show that the sulfate concentration has a significant effect on the corrosion deterioration of concrete with different fiber volume under the dry wet cycle.With the increase of sulfate concentration,the compressive strength,splitting compressive strength and mass change curve under the dry wet cycle condition gradually evolved from the approximate linear growth to the“pot cover”increase first and then decrease,the maximum value corresponding to the dry wet cycle cycle is 30,and the relative dynamic elastic modulus evolved from“lying L-type”to“lying S-type”.The addition of appropriate amount of fiber can effectively improve the compactness of concrete and weaken the influence of sulfate erosion on the deterioration of concrete performance.

关 键 词：硫酸盐侵蚀 纤维混凝土 干湿循环 性能劣化 耐久性 

分 类 号：TU528.571[建筑科学—建筑技术科学]