材料导报 2021, Vol. 35 Issue (z2): 638-641
高分子与聚合物基复合材料
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短切芳纶纤维掺量对水泥基复合材料强度和孔结构的影响
李紫轩, 李地红, 卞立波, 冯雨琛, 张亚晴, 于海洋
北京建筑大学土木与交通工程学院,北京 102616
Effect of Cutting Aramid Fiber Content on Strength and Pore Structure of Cement-based Composites
LI Zixuan, LI Dihong, BIAN Libo, FENG Yuchen, ZHANG Yaqing, YU Haiyang
College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China
摘要 本文研究了不同长度的短切芳纶纤维在不同掺量下对水泥基复合材料抗折强度、抗压强度及微观孔结构的影响。试验结果表明,加入短切芳纶纤维能显著提高水泥基复合材料的准静态力学性能(抗折强度、抗压强度)。长度为1 mm、3 mm的纤维,分别在掺量10 vol%、2vol%时,水泥基复合材料的抗折强度达到峰值;试件的抗压强度,随着纤维掺量的增加,呈现先增大后减小的趋势;此外,随着芳纶纤维掺量的变化,试件的凝胶孔含量、细化孔结构的效果与抗折强度、抗压强度的增减呈现一致性。
关键词:
短切芳纶纤维
纤维掺量
强度
孔结构
Abstract: The effects of chopped aramid fibers with different lengths on the flexural strength, compressive strength and microscopic pore structure of cement-based composites were studied in this paper. The results show that the quasi-static mechanical properties (flexural strength and compressive strength) of cement-based composites are significantly improved by adding chopped aramid fiber. The flexural strength of fibers with length of 1 mm and 3 mm reaches the peak when the content of fibers is 10 vol% and 2vol%, respectively. The compressive strength of the specimen increases first and then decreases with the increase of fiber content. In addition, with the change of the content of aramid fiber, the gel pore content and the effect of refining pore structure of the specimen are consistent with the increase and decrease of the flexural strength and compressive strength.
Key words:
aramid fiber
fiber content
structure
flexural strength
发布日期: 2021-12-09
通讯作者:
bianlibo@bucea.edu.cn
作者简介: 李紫轩,北京建筑大学土木与交通工程学院硕士研究生,从事土木工程材料研究工作,主要研究方向为纤维增强水泥基复合材料。 卞立波,2016 年6 月毕业于北京科技大学,获得工学博士学位。现为北京建筑大学副教授,讲授《建筑材料测试技术》《土木工程材料》及无机非金属材料工程专业课程中的试验课程。主持北京市自然基金、北京市教委项目、科技部重点研发技术、企业委托项目多项。主要研究领域为多元复合新型胶凝材料技术、多孔质混凝土混凝土技术和特种及新型建材。授权/申请发明专利16 项,实用新型7 项,发表相关论文20 余篇。
引用本文:
李紫轩, 李地红, 卞立波, 冯雨琛, 张亚晴, 于海洋. 短切芳纶纤维掺量对水泥基复合材料强度和孔结构的影响[J]. 材料导报, 2021, 35(z2): 638-641.
LI Zixuan, LI Dihong, BIAN Libo, FENG Yuchen, ZHANG Yaqing, YU Haiyang. Effect of Cutting Aramid Fiber Content on Strength and Pore Structure of Cement-based Composites. Materials Reports, 2021, 35(z2): 638-641.
链接本文:
http://www.mater-rep.com/CN/
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http://www.mater-rep.com/CN/Y2021/V35/Iz2/638
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