偶联剂改性玄武岩纤维增强水泥基复合材料力学性能

材料导报

2019, Vol. 33

Issue (Z2): 273-277

无机非金属及其复合材料

偶联剂改性玄武岩纤维增强水泥基复合材料力学性能

王林¹, 王梦尧¹, 王佩勋², 卢京宇¹

1 北京建筑大学土木与交通工程学院,北京 100044;
2 中铁二局第四工程有限公司,成都 610031

Mechanic Properties of Cement Matrix Composites Reinforced with Basalt FiberModified with Silane Coupling Agent

WANG Lin¹, WANG Mengyao¹, WANG Peixun², LU Jingyu¹

1 College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044;
2 China Railway ERJU 1st Engineering Co., Ltd, Chengdu 610031

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摘要为改善玄武岩纤维(BF)与水泥基材料的界面结合作用,分别采用质量分数为0.4%、0.8%和1.2%的γ-氨丙基三乙氧基硅烷(CG550)、γ-甲基丙烯酰氧丙基三甲氧基硅烷(CG570)和乙烯基三乙氧基硅烷(Z6518)的三种硅烷偶联剂对玄武岩纤维进行表面处理,研究改性后纤维及其增强混凝土的力学性能影响规律。实验结果表明,随着CG550溶液浓度增加,改性玄武岩纤维及其水泥基复合材料力学性能整体呈上升趋势,当CG550溶液浓度为1.2%时,纤维及其增强水泥基材料有最佳的力学性能;随着CG570溶液浓度增加,改性后玄武岩纤维的断裂强度先升高后降低,断裂伸长率基本不变,纤维断裂强度最高提升5.8%,其水泥基复合材料的力学性能随溶液浓度增加呈上升趋势,抗折强度最高提升24.4%,抗压强度最高提升7.3%;随着Z6518溶液浓度上升,改性后玄武岩纤维的断裂强度逐渐降低,但断裂伸长率逐渐增高,表现出较好的延性;其水泥基复合材料力学性能随浓度变化无明显改善。综合考虑实验结果,三种硅烷偶联剂对纤维的改性效果好坏依次为CG570、CG550、Z6518。

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关键词: 玄武岩纤维水泥基复合材料表面改性硅烷偶联剂力学性能

Abstract: For improving the interface bonding effect of the basalt fiber (BF) to cement-based material, the BF was treated with different concentration (0.4%, 0.8% and 1.2%) of CG550,CG570,Z6518 respectively.The mechanical properties of the treated fiber and BF enhanced cement composites are studied. The experimental results show that with the increasing concentration of CG550 solution, the mechanical properties of treated fiber and BF/cement composite increase as a whole. The treated BF and BF/cement composites have the best mechanical properties,as the concentration of CG550 solution is 1.2%. With the increasing concentration of CG570 solution, the fracture strength of treated BF increases firstly and then decreases,and the fracture elongation remains basically unchanged. The fracture strength of BF raises by 5.8%. The mechanical properties of BF/cement composites increases with the increasing of solution concentration.The highest flexural strength raises by 24.4%, the highest compressive strength raises by 7.3%; with the increasing concentration of Z6518 solution, the fracture strength of treated BF decreases gradually, but the fracture elongation increases gradually, showing good ductility. The mechanical properties of BF/cement composites is not improved significantly with the change of concentration.Considering the experimental results, the modification effects of three silane coupling agents on the fibers were ranked as CG570, CG550 and Z6518.

Key words: basalt fiber cement matrix composite surface modification silane coupling agent mechanic properties

出版日期: 2019-11-25 发布日期: 2019-11-25

ZTFLH:

TU528

基金资助: 北京市属高校基本科研业务费专项资金(X18265)

通讯作者: wanglin@bucea.edu.cn

作者简介: 王林,北京建筑大学副教授,在清华大学获得硕士学位,在北京中国矿业大学获得博士学位。现任教于北京建筑大学。以第一作者身份发表学术论文10余篇,申请发明专利3项。主持包括国家自然科学基金项目、北京市自然科学基金项目及建设部相关项目等,主要研究方向为水泥基材料。

引用本文:

王林, 王梦尧, 王佩勋, 卢京宇. 偶联剂改性玄武岩纤维增强水泥基复合材料力学性能[J]. 材料导报, 2019, 33(Z2): 273-277.
WANG Lin, WANG Mengyao, WANG Peixun, LU Jingyu. Mechanic Properties of Cement Matrix Composites Reinforced with Basalt FiberModified with Silane Coupling Agent. Materials Reports, 2019, 33(Z2): 273-277.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/IZ2/273

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