粗合成纤维混凝土中纤维抗化学介质腐蚀性研究  

Research on Fiber Anti-corrosion to Chemical Ions of Synthetic Macro-fiber Reinforced Concrete

作　　者：张丽辉 刘建忠 阳知乾 徐德根 吕进 

机构地区：[1]高性能土木工程材料国家重点实验室,南京210008 [2]江苏苏博特新材料股份有限公司,南京211103

出　　处：《混凝土与水泥制品》2016年第9期48-52,共5页China Concrete and Cement Products

基　　金：江苏省六大人才高峰项目(2013-JZ-003);东南大学江苏省土木工程材料重点实验室开放基金项目(CM2015-05)

摘　　要：为了揭示粗合成纤维混凝土中纤维的抗化学介质腐蚀能力,通过对比试验研究了预埋在混凝土中的粗合成纤维及直接浸泡在腐蚀溶液中的粗合成纤维对碱、氯离子及盐溶液的抗腐蚀能力。结果表明,随着测试龄期的延长,埋在混凝土中及直接浸泡在腐蚀介质中的粗合成纤维的极限抗拉强度均逐渐降低,但降低速率逐渐减小;在碱、氯离子及盐溶液中直接浸泡180d,粗合成纤维的剩余抗拉强度分别为85.76%、86.82%和89.11%;当测试时间和腐蚀环境相同时,埋在混凝土中的粗合成纤维的极限抗拉强度与直接浸泡在腐蚀介质中的粗合成纤维的极限抗拉强度相当;无论是埋在混凝土中还是直接浸泡在腐蚀溶液中的粗合成纤维均具有优异的抗碱、抗氯离子及抗盐腐蚀能力,且抗腐蚀能力由高到低依次为盐溶液>氯离子溶液>碱溶液。In order to reveal anti-corrosion for resistance to chemical ions of fiber in synthetic macro-fiber reinforced concrete, anti-corrosion properties of macro-synthetic fiber on alkali, chloride and salt solution are studied through com- parative experiment that macro-synthetic fiber is embedded in concrete and soaked directly in etching solution. The re- sults show that, with prolonging tested age, ultimate tensile strength of macro-synthetic fiber which is buried in concrete and directly immersed in corrosive medium is gradually decreased, however, decreased rate is gradually reduced; while testing time is up to 180 days, residual tensile strength of macro-synthetic fiber immersed in alkali, chloride and salt solu- tion is 85.76%, 86.82% and 89.11%, respectively. Little differences exist between untimate tensile strengths of synthetic macro-fibers embedded into concrete and immersed directly into corrosion environments under the same test time and corrosion environments. Not only synthetic macro-fiber embedded into the concrete but also that immersed directly into corrosion environments both have excellent resistances to alkali, chloride and salt corrosion environments and the capacity to corrosion resistance from large to small is salt, chloride and alkali in order.

关 键 词：粗合成纤维 化学腐蚀介质 抗腐蚀性 剩余抗拉强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]