冻融循环作用下玄武岩纤维混凝土抗压和抗折性能分析  

Analysis of compressive and flexural properties of basalt fiber reinforced concrete specimens under freeze-thaw

作　　者：王起台 任根立 WANG Qitai;REN Genli(College of Architecture and Engineering,Zhengzhou Business University,Zhengzhou,Henan,451200,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou,Jiangsu,221116,China)

机构地区：[1]郑州商学院建筑工程学院,郑州451200 [2]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《湖南城市学院学报（自然科学版）》2023年第4期6-12,共7页Journal of Hunan City University:Natural Science

基　　金：河南省高等学校大学生创新创业训练计划项目(S202114040015)。

摘　　要：通过掺加纤维的方法可有效改善混凝土在寒冷或者低温地区的冻害情况.基于此,本文通过控制变量法设计了5组不同冻融循环作用次数和4种玄武岩纤维掺量下的正交试验,并以此探究了不同冻融循环作用和不同玄武岩纤维掺量下混凝土的力学性能.研究结果表明:1)掺加玄武岩纤维可有效提高混凝土抗压强度、抗折强度以及抗冻融性能,且当掺量为2 kg/m^(3)时其强度提高幅度最大;2)随着玄武岩纤维掺量的增加,混凝土抗折强度提高率增大,而抗压强度提高率则先增大后减小;3)当玄武岩纤维掺量为2 kg/m^(3)时,不同冻融循环作用下混凝土抗折强度降低率随着冻融次数的增加而增加,抗压强度降低率则不明显.The frost damage of concrete in cold or low temperature areas can be effectively improved by adding fiber.In this paper,five groups of orthogonal tests under different freeze-thaw cycles and four kinds of basalt fiber content were designed by the method of controlled variables,and the mechanical properties of concrete under different freeze-thaw cycles and basalt fiber content were studied.The results show that:1)The compressive strength,flexural strength and freeze-thaw resistance of concrete can be effectively improved by adding basalt fiber,and the strength increase is the highest when the content is 2 kg/m^(3).2)With the increase of basalt fiber content,the increase rate of flexural strength of concrete increases,while that of compressive strength increases at first and then decreases.3)When the content of basalt fiber is 2 kg/m^(3),the decrease rate of flexural strength of concrete under different freeze-thaw cycles increases with the increase of freeze-thaw times,but the decrease rate of compressive strength is not obvious.

关 键 词：冻融循环 玄武岩纤维混凝土 抗压试验 抗折试验 

分 类 号：TU528[建筑科学—建筑技术科学] TU111.25