酸溶液、冻融循环及其耦合作用下玄武岩纤维筋耐久性试验  

Experimental Study on the Durability of BFRP Bars under the Acidic Solution,the Cycle of Freezing and Thawing and the Coupled Actions

作　　者：王海良 吴振 WANG Hailiang;WU Zhen(School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384,China;Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin 300384,China)

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]天津市土木建筑结构防护与加固重点实验室,天津300384

出　　处：《防灾减灾工程学报》2018年第1期39-46,80,共9页Journal of Disaster Prevention and Mitigation Engineering

基　　金：天津市自然基金重点项目(12JCZDJC28900);天津市科技兴海项目(KJXH2012-19)资助

摘　　要：进行了3种不同直径玄武岩纤维（BFRP）筋在酸溶液、冻融循环及其耦合作用下耐久性试验,分析环境类型及作用时间对其弹性模量、抗拉强度的影响。结果表明：3种不同直径BFRP筋在酸溶液、冻融循环及其耦合作用下,直径6mm BFRP筋抗拉强度降低分别最多达33.9%、10.5%、31.1%,直径8mm BFRP筋抗拉强度降低分别最多达29.2%、6.9%、28.6%,直径10mm BFRP筋抗拉强度降低分别最多达10.2%、14%、10.2%;耦合作用下直径6、8mm BFRP筋与环氧树脂基体界面受破坏程度大于单因素环境,直径10mm BFRP筋受其影响不明显;3种不同直径BFRP筋在自然环境下其弹性模量变化范围为46.2±1GPa,在酸溶液、冻融环境及二者耦合作用下其弹性模量变化范围为46.5±1.5GPa,上述环境对3种不同直径BFRP筋弹性模量影响偏差在0.44%-1.67%之间;冻融循环作用下,3种不同直径BFRP筋在Lemaitre应变等价原理方面具有一定精度。The effects of environment types and acting time on the elastic modulus and tensile strength of basalt fiber reinforced polymer（BFRP）were analyzed by performing durability experimental tests under the condition of acid solution,freeze-thaw cycles and coupled effects.The test variables include BFRP diameter（6 mm,8 mm,10 mm）,corrosion age（15 d,30 d,45 d）,freeze-thaw cycles（50—300 times）,etc.The results show that under the action of acid solution,freeze-thaw cycles and coupled actions,the tensile strength is decreased by up to 33.9%,10.5%,31.1%,respectively,for BFRP bars with diameter of 6 mm,by up to 29.2%,6.9%,28.6%,respectively,for those with diameter of 8 mm,and by up to 10.2%,14%,10.2%,respectively,for those with diameter of 10 mm.The damages of BFRP bars with diameter of 6 mm or 8 mm and the epoxy resin matrix interface were greater under coupled effects than those under single effect,but the influence is not obvious for bars with diameter of 10 mm.The elastic modulus of BFRP bars with three different diameters is 46.2 ±1 GPa under the natural environment,while it became 46.5 ±1.5 GPa under the condition of acid solution,freeze-thaw cycles and coupled effects.Under the influence of above environmental factors,the variation of elastic modulus of BFRP bars with three different diameters reinforced is 0.44%—1.67%.BFRP bars with three different diameters have a certain precision with respect to the Lemaitre strain equivalence principle under freeze-thaw cycles.

关 键 词：BFRP筋 冻融循环 抗拉强度 应变等价 

分 类 号：TU202.6[建筑科学—建筑设计及理论]