玄武岩纤维增强地聚合物混凝土劈拉试验研究  

Splitting tensile test study on basalt fiber-reinforced geopolymer concrete

作　　者：陈勇[1] 周布奎 王丽梅 张威[2,3] 俞煌[2] 于潇 CHEN Yong;ZHOU Bukui;WANG Limei;ZHANG Wei;YU Huang;YU Xiao(Unit 32391 of PLA,Nanjing 210016,China;Defense Engineering Institute,AMS,PLA,Beijing 100850,China;Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国人民解放军32391部队,江苏南京210016 [2]军事科学院国防工程研究院,北京100850 [3]哈尔滨工程大学,黑龙江哈尔滨150001

出　　处：《防护工程》2023年第6期7-11,共5页Protective Engineering

摘　　要：为研究玄武岩纤维对地聚合物混凝土劈拉强度的增强效应,对地聚合物混凝土(geopolymer concrete,GPC)和玄武岩纤维增强地聚合物混凝土(basalt fiber reinforced geopolymer concrete,BFRGPC)进行了静态和动态劈拉试验,动态试验的应变率为2~17 s^(-1)。结果表明,玄武岩纤维对地聚合物混凝土的劈拉强度提升有限,GPC和BFRGPC的静态和动态劈拉强度相差不大,2种材料在劈拉荷载作用下均表现出脆性破坏特征,抗拉性能较差。在动荷载下,GPC和BFRGPC的劈拉强度均存在应变率效应,相似的应变率下,GPC和BFRGPC的动态强度增强因子(dynamic increase factor,DIF)差异不明显。To investigate the strengthening effect of basalt fibers on the tensile strength of geopolymer concrete,static and dynamic splitting tests were conducted on geopolymer concrete(GPC)and basalt fiber reinforced geopolymer concrete(BFRGPC).The dynamic test involved strain rates ranging from 2~17 s^(-1).The results indicate that the enhancement of tensile strength in geopolymer concrete due to the inclusion of basalt fibers is limited.There is no significant difference in the static and dynamic tensile strengths between GPC and BFRGPC.Both materials exhibit brittle failure characteristics under tensile loading,with poor tensile performance.Under dynamic loading,both GPC and BFRGPC show strain rate effects on tensile strength,and at similar strain rates,the dynamic increase factor(DIF)in tensile strength between GPC and BFRGPC is not pronounced.

关 键 词：劈拉试验 地聚合物 玄武岩纤维 高应变率 

分 类 号：TU528[建筑科学—建筑技术科学]