复合盐侵蚀下玄武岩纤维混凝土耐久性研究  

Study on Durability of Basalt Fiber Concrete Under Composite Salt Erosion

作　　者：肖建东 Xiao Jiandong(Fujian Heshunde Concrete Co.Ltd.,Fuzhou,Fujian 350100)

机构地区：[1]福建和顺德混凝土有限公司,福建福州350100

出　　处：《江西建材》2024年第12期50-53,共4页

摘　　要：为改善玄武岩纤维混凝土的耐久性,文中研究了不同掺量的玄武岩纤维对混凝土抗压强度和抗折强度的影响,并分析了复合盐侵蚀及其与干湿、冻融耦合作用下混凝土的质量损失和相对动弹性模量,以探讨其劣化机制。结果表明,最佳玄武岩纤维掺量为0.3%,与基准试件相比,其抗压强度和抗折强度分别提升了6.60%和13.16%。经过30次干湿循环后,BFC3的质量损失率仅为0.51%;100次冻融循环后,BFC3的质量损失率为2.01%,仅为基准试件的一半,表明玄武岩纤维能有效延缓混凝土性能的衰退,显著增强其耐腐蚀性能和抗盐冻性能。In order to improve the durability of basalt fiber concrete,the effects of different content of basalt fiber on compressive strength and flexural strength of concrete were studied.The mass loss and relative dynamic elastic modulus of concrete under composite salt erosion and its coupling with dry,wet,freeze-thaw were analyzed to explore the deterioration mechanism.The results show that the optimum basalt fiber content is 0.3%,and the compressive strength and flexural strength are increased by 6.60%and 13.16%,respectively,compared with the benchmark specimen.After 30 dry and wet cycles,the mass loss rate of BFC3 was only 0.51%.After 100 freeze-thaw cycles,the mass loss rate of BFC3 is 2.01%,which is only half of the benchmark specimen.The results show that basalt fiber can effectively delay the deterioration of concrete properties and significantly enhance its corrosion resistance and salt-freeze resistance.

关 键 词：复合盐侵蚀 玄武岩纤维 干湿循环 冻融循环 

分 类 号：TU528[建筑科学—建筑技术科学]