玄武岩-纤维素混杂纤维混凝土抗冻性能研究  

Study on frost resistance of basalt-cellulose hybrid fiber reinforced concrete

作　　者：孙传武 王学志[1] 辛明 贺晶晶 SUN Chuanwu;WANG Xuezhi;XIN Ming;HE Jingjing(School of Civil and Architectural Engineering,Liaoning University of Technology,Jinzhou 121001,China;Power China Northwest Engineering Corporation Limited,Xi’an 710065,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《混凝土与水泥制品》2024年第7期65-69,共5页China Concrete and Cement Products

基　　金：辽宁省教育厅高等学校基本科研项目(LJKMZ20220979);陕西省自然科学基础研究计划资助项目(2021JQ-983)。

摘　　要：研究了玄武岩纤维(BF)、纤维素纤维(CF)、玄武岩-纤维素混杂纤维(BF-CF混杂纤维)对混凝土抗冻性能的影响,并进行了SEM分析。结果表明:单掺BF或CF均能提升混凝土的抗冻性能,其中,BF的提升效果更好;随着BF或CF掺量的增加,混凝土的抗冻性能呈先提高后降低的趋势,且均优于未掺纤维组;BF-CF混杂纤维对混凝土抗冻性能的改善效果优于单掺纤维,且当BF与CF的混掺比例为2∶1时,混凝土的抗冻性能相对最优;纤维混凝土在150次冻融循环后仍能保持较为紧密的内部结构。The effects of basalt fiber(BF),cellulose fiber(CF),and basalt-cellulose hybrid fiber(BF-CF hybrid fiber)on the frost resistance of concrete were investigated,and SEM analysis was performed.The results show that mixing BF or CF alone can improve the frost resistance of concrete,among which,BF has a better improvement effect.With the increase of the content of BF or CF,the frost resistance of concrete shows a tendency of increasing and then decreasing,and still better than that of the unadulterated fiber group.The improvement effect of BF-CF hybrid fiber on the frost resistance of concrete is better than that of the single fiber,and the frost resistance of the concrete is relatively optimal when the mixing ratio of BF and CF is 2∶1.After 150 freeze-thaw cycles,the fiber reinforced concrete retains a relatively tight internal structure.

关 键 词：冻融循环 玄武岩纤维 纤维素纤维 混杂纤维 微观结构 

分 类 号：TU528.572[建筑科学—建筑技术科学]