硫酸钙晶须-玄武岩纤维混凝土抗氯离子渗透性能试验  

Experimental Research on Chloride Penetration Resistance of Calcium Sulfate Whisker and Basalt Fiber Concrete

作　　者：李趁趁[1] 张文彬 张普[1] 李春跃[1] LI Chenchen;ZHANG Wenbin;ZHANG Pu;LI Chunyue(College of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学土木工程学院,郑州450001

出　　处：《工业建筑》2022年第9期48-52,66,共6页Industrial Construction

基　　金：国家自然科学基金河南省联合基金项目(U1904177)。

摘　　要：通过快速氯离子迁移系数法(RCM法)来测定氯离子在混凝土内部的非稳态迁移系数,从而评定混凝土抗氯离子渗透性能,研究了不同体积率的玄武岩纤维、不同质量掺量的硫酸钙晶须以及复掺不同掺量的玄武岩纤维和硫酸钙晶须对混凝土抗氯离子渗透性能的影响。结果表明,单掺玄武岩纤维对混凝土的抗氯离子渗透性能影响规律不明显,这与混凝土基体组成成分有关。单掺硫酸钙晶须可以提高混凝土抗氯离子渗透性能,随着掺量增加,混凝土的抗氯离子渗透性能先升后降,但均高于普通混凝土,最佳掺量为2%,此时抗氯离子渗透性能较普通混凝土提高36.8%。适量复掺玄武岩纤维和硫酸钙晶须能够提高混凝土的抗氯离子渗透性能,最大提高率为33.7%;复掺玄武岩纤维和硫酸钙晶须混凝土的抗氯离子渗透性能提高主要贡献来自硫酸钙晶须。Rapid chloride ion migration coefficient method(RCM)was used to measure the unsteady migration coefficient of chloride ion in concrete,so as to evaluate the resistance of concrete to chloride penetration.The effects of basalt fiber with different volume ratio,calcium sulfate whisker with different mass contents and different hybrid fiber contents of basalt fiber and calcium sulfate whisker on resistance of concrete to chloride penetration were studied.The results showed that the influence of single basalt fiber on the resistance of concrete to chloride penetration was not obvious.Resistance of concrete to chloride permeability could be improved by adding calcium sulfate whisker alone.With increase of the whisker content,the resistance of concrete to chloride permeability increased first and then decreased,but it was all higher than that of ordinary concrete.The optimal whisker content was 2%,and the chloride ion permeability resistance of concrete was improved by 36.8%compared with that of ordinary concrete.An appropriate hybrid fiber content of basalt fiber and calcium sulfate whisker could improve the resistance of concrete to chloride penetration,and the maximum improvement rate was 33.7%.The improvement of chloride penetration resistance of hybrid fiber concrete with basalt fiber and calcium sulfate whisker was mainly from calcium sulfate whisker.

关 键 词：玄武岩纤维 硫酸钙晶须 混凝土 纤维掺量 抗氯离子渗透性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]