摘要
玄武岩纤维相对于钢纤维具有密度小、韧性好、耐腐蚀、耐高温及较好耐久性等优点。纤维复合材料对增强混凝土力学性能具有较大的应用价值,是近年来土木结构工程领域的研究热点之一。为进一步研究短切玄武岩纤维增强混凝土(BFRC)的增强增韧作用,首先从理论上分析了纤维增强增韧机理,并在微观上分析了不同工艺对纤维增强混凝土力学性能的影响因素;然后采用单轴试验方法,对两种不同工艺制作的BFRC进行准静态压缩试验,并与传统钢纤维增强混凝土(SFRC)进行对比。试验结果表明,在一定的加载速率下,BFRC的增强增韧作用大于SFRC;玄武岩纤维几何特征、体积掺量以及试件制备工艺对BFRC具有较大的影响。合理的BFRC制备工艺可以提高其增强增韧力学性能。最后根据实验结果给出了具有一定应用价值的玄武岩纤维含量和混杂纤维含量。
Superior to steel fiber,basalt fiber features lower density,greater toughness and corrosion resistance,higher thermo stability as well as more favorable durability.Fiber composite material,due to its great application value to the mechanical properties of reinforced concrete,recently arises as one of the research hotspots in the field of civil structure engineering.The paper attempts to further the study of strengthening and toughening effect of the short cut basalt fiber reinforced concrete(BFRC).Firstly,the mechanism of fiber strengthening and toughening is theoretically analyzed and the influential factors of different processes on the mechanical properties of fiber-reinforced concrete are analyzed on the microcosmic level respectively;then the quasi-static compression test is carried out on two different processes of BFRC,which is then compared with the traditional method Steel fiber reinforced concrete(SFRC).The results show that given a certain loading rate,the strengthening and toughening effect of BFRC is greater than that of SFRC.Moreover,the geometric characteristics,volume content and specimen preparation technology of basalt fiber have a great influence on BFRC.BFRC’s mechanical properties of strengthening and toughening can be enhanced by advanced preparation technology and the content of basalt fiber and hybrid fiber with certain application value are provided.
作者
施国栋
SHI Guodong(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;National-local Joint Engineering Laboratory of Building Health Monitoring and Disaster Prevention Technology,Hefei 230601,China)
出处
《安徽工程大学学报》
CAS
2020年第2期85-94,共10页
Journal of Anhui Polytechnic University
基金
国家自然科学研究基金资助项目(51774007)
安徽省教育厅自然科学研究基金资助项目(KJ2018JD03)
自然资源部中国地质调查局基金资助项目(DD20190647)
中安华力建设集团有限公司产学研基金资助项目(HYB20190152)。
关键词
玄武岩纤维
钢纤维
强度对比
basalt fiber
steel fiber
strength contrast
