玄武岩纤维混凝土补强新老混凝土粘结性能试验研究  

Experimental Study on the Bond Properties of Basalt Fiber Reinforced Concrete

作　　者：周焱斌 夜鹏飞 ZHOU Yanbin;HEI Pengfei(Guangdong Traffic Engineering Quality Testing Center of Building Academy Co.,Ltd.Guangzhou 510550,China;Guangdong Province Traffic Infrastructure Intelligent Detection Engineering Technology Research Center Guangzhou 510550,China;Construction Technology Co.,Ltd.,China Communications 2nd Navigational Bureau Wuhan 430415,China)

机构地区：[1]广东建科交通工程质量检测中心有限公司,广州510550 [2]广东省交通基础设施智能检测工程技术研究中心,广州510550 [3]中交二航局建筑科技有限公司,武汉430415

出　　处：《广东土木与建筑》2023年第9期103-106,共4页Guangdong Architecture Civil Engineering

摘　　要：掺入玄武岩纤维作为一种改善混凝土收缩性能的有效手段,常常与添加减缩剂以及结合面增糙等手段联合应用于增大截面法的破旧混凝土修复工作中。从影响新老混凝土结合的3个主要因数(结合面粗糙度、减缩剂掺量以及玄武岩纤维掺量)开展混凝土试件的室内收缩试验。试验结果表明,新老混凝土试件收缩发展曲线大致经历了早期快速发展、后期平缓稳定发展两阶段,新老混凝土试件收缩随着结合面粗糙度的增加、减缩剂掺量的增加、玄武岩纤维掺量的增加而减小,其中玄武岩纤维掺量对新老混凝土粘结收缩性能影响最为显著。As an effective means to improve the shrinkage performance of concrete,basalt fiber is often used in conjunction with the ad-dition of shrinkage reducing agent and the roughness of the joint surface in the repair of dilapidated concrete with the enlarged section meth-od.The indoor shrinkage test of concrete specimens is carried out from three main factors affecting the combination of new and old concrete(the roughness of the joint surface,the amount of shrinkage reducing agent and the amount of basalt fiber).The test results show that the shrinkage development curve of the new and old concrete specimens has roughly experienced two stages of rapid development in the early stage and gentle and stable development in the later stage.The shrinkage of the new and old concrete specimens decreases with the increase of the roughness of the joint surface,the increase of the content of shrinkage reducing agent,and the increase of the content of basalt fi-ber,among which the content of basalt fiber has the most significant impact on the bond shrinkage performance of the new and old concrete.

关 键 词：混凝土 结合面 玄武岩纤维 粘结收缩 

分 类 号：TU375[建筑科学—结构工程]