[1]王文帅,张　鹏,尉晓雪,等.纳米SiO2和混杂纤维增强ECRM粘结特性研究[J].郑州大学学报(工学版),2026,47(01):95-101(123).[doi:10.13705/j.issn.1671-6833.2025.04.025]
　WANG Wenshuai,ZHANG Peng,WEI Xiaoxue,et al.Study on the Bonding Properties of Nano-SiO2 and Hybrid Fiber Reinforced ECRM[J].Journal of Zhengzhou University (Engineering Science),2026,47(01):95-101(123).[doi:10.13705/j.issn.1671-6833.2025.04.025]
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纳米SiO2和混杂纤维增强ECRM粘结特性研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
47
期数:
2026年01期
页码:
95-101(123)
栏目:
出版日期:
2026-01-06

文章信息/Info

Title:
Study on the Bonding Properties of Nano-SiO2 and Hybrid Fiber Reinforced ECRM
文章编号:
1671-6833(2026)01-0095-07
作者:
王文帅1;  张　鹏1;  尉晓雪2;  吴靖江2;  张承实2
1.郑州大学 水利与交通学院,河南 郑州 450001;2.中建七局交通建设有限公司,河南 郑州 450003
Author(s):
WANG Wenshuai1;  ZHANG Peng1;  WEI Xiaoxue2;  WU Jingjiang2;  ZHANG Chengshi2
1.School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China; 2.Communications Construction Company of CSCEC 7th Division Co., Ltd., Zhengzhou 450003,China
关键词:
纳米SiO2;  混杂纤维;  环氧树脂;  界面弯拉强度;  增强机理
Keywords:
nano-SiO2;  hybrid fiber;  epoxy resin;  interface flexural bonding strength;  strengthening mechanism
分类号:
TU528.58TU502TV431.3
DOI:
10.13705/j.issn.1671-6833.2025.04.025
文献标志码:
A
摘要:
为了制备出高性能的环氧树脂水泥基修复材料(ECRM),有效解决大坝裂缝修复问题,通过界面弯拉强度试验分析了环氧树脂、纳米SiO2和钢-PVA混杂纤维的掺量对水泥基修复材料粘结性能的影响,通过扫描电子显微镜试验揭示了水泥基修复材料粘结性能的增强机理。研究结果表明:随着环氧树脂、钢纤维和PVA纤维掺量的增加,水泥基修复材料的界面弯拉强度均呈现先升高后降低的变化趋势。当环氧树脂的掺量为9%(质量分数,下同),PVA纤维的体积掺量为0.9%(体积分数,下同)和钢纤维的体积掺量为1.2%时,水泥基修复材料的界面弯拉强度达到最大,此时相比于基准组(未掺环氧树脂、纳米SiO2、PVA纤维和钢纤维)提升了68.2%;随着纳米SiO2的掺量从0增加到2.0%,水泥基修复材料的界面弯拉强度逐渐增大,增幅为14.7%;相比于掺加纳米SiO2、钢纤维或PVA纤维,掺加环氧树脂对水泥基修复材料粘结性能的提升效果更加显著。水泥基修复材料粘结性能的微观增强机理可归结为环氧树脂和钢-PVA混杂纤维的掺入能够抑制基体内裂缝的产生和扩展,提高基体的整体性。纳米SiO2的掺入能够减少基体内部的孔洞缺陷,提高基体的密实度。
Abstract:
To prepare high-performance epoxy resin cementitious repair materials (ECRM) for effectively addressing dam crack rehabilitation, the influence of the content of epoxy resin, nano-SiO2, and steel-PVA hybrid fiber on the bonding properties of cementitious repair materials was analyzed by the interface flexural bonding strength test. The strengthening mechanism of the bonding properties of cementitious repair materials was revealed by the scanning electron microscope test. The results showed that the interface flexural bonding strength of cementitious repair materials increased first, and then decreased with the increase of epoxy resin, steel fiber, and PVA fiber content. When the content of epoxy resin was 9% (mass fraction, the same below), the volume content of PVA fiber was 0.9% (volume fraction, the same below), and the volume content of steel fiber was 1.2%, the interface flexural bonding strength of cementitious repair materials reached the maximum, which was an increase of 68.2% compared to the control group (without epoxy resin, nano-SiO2, PVA fibers, and steel fibers). As the content of nano-SiO2 increased from 0% to 2.0%, the interface flexural bonding strength of cementitious repair materials gradually rosed with an increase of 14.7%. Compared to nano-SiO2, steel fiber, or PVA fiber, the addition of epoxy resin had a more significant effect on the improvement of the bonding properties of cementitious repair materials. The microscopic strengthening mechanism of cementitious repair materials could be concluded as follows, the addition of epoxy resin and steel-PVA hybrid fiber could inhibit the formation and expansion of cracks in the matrix and improve the integrity of the matrix. The addition of nano-SiO2 could reduce the hole defects in the matrix and improve the compactness of the matrix.

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更新日期/Last Update: 2026-01-17