混杂纤维单组分地聚物组成设计及纤维影响效应研究

doi:10.16552/j.cnki.issn1001-1625.2024.1031

摘要/Abstract

摘要： 针对单组分地聚物韧性不足的问题,选取聚乙烯醇纤维(PVA)、仿钢纤维(ISF)、碳酸钙晶须(CCW)三种纤维,进行了单掺和混掺设计试验。通过分析三种纤维对地聚物流动性及力学性能的影响,并结合扫描电子显微镜、X射线衍射和傅里叶变换红外光谱等微观测试手段,探讨了单掺和混掺纤维对地聚物性能的影响机制及规律。结果表明,三种纤维均在不同程度上降低地聚物流动性,PVA、ISF、CCW体积掺量为0.6%、1.5%、1.5%时,对应单纤维地聚物流动度相较基准组分别降低了54.0%、33.4%、19.8%。PVA和ISF对地聚物抗压强度有负面影响,而CCW则表现出增强效果。当PVA、ISF、CCW体积掺量分别为0.4%、1.2%、1.2%时,混杂纤维地聚物抗折强度提高了89.1%。微观试验表明,PVA通过桥接效应增强地聚物韧性,ISF通过滑移效应增韧,CCW则通过填充作用提高抗折强度。优化纤维配比后,混杂纤维地聚物展现出优良的流动性和抗折强度。

关键词: 单组分地聚物, 混杂纤维, 组成设计, 影响效应, 抗折强度, 微观分析

Abstract: Aiming at the problem of insufficient toughness of one-part geopolymer, three kinds of fibers, polyvinyl alcohol fiber, imitation steel fiber and calcium carbonate whisker, were selected to design the composition of single-doped and mixed-doped geopolymers. The effects of three kinds of fibers on the fluidity and mechanical properties of geopolymers were analyzed. Combined with scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy, the mechanisms and patterns of fibers influence on the properties of geopolymers were investigated. The results show that all kinds of fibers reduce the fluidity of geopolymer to varying degrees. When the volume content of polyvinyl alcohol fiber, imitation steel fiber and calcium carbonate whisker is 0.6%, 1.5% and 1.5%, the fluidity of three kinds of single fiber geopolymer is 54.0%, 33.4% and 19.8% lower than that of the reference group, respectively. The incorporation of polyvinyl alcohol fiber and imitation steel fiber has a negative effect on the compressive strength of geopolymer, while calcium carbonate whisker shows a reinforcing effect. When the volume content of polyvinyl alcohol fiber, imitation steel fiber and calcium carbonate whisker is 0.4%, 1.2% and 1.2%, the flexural strength of hybrid fiber geopolymer increases by 89.1%. Microscopic analysis indicates that polyvinyl alcohol fiber enhances the toughness of geopolymers via bridging effects, imitation steel fiber contributes to toughening primarily through slip mechanisms, and calcium carbonate whisker improves flexural strength by filling voids. Optimized fiber proportion results in hybrid fiber geopolymers with superior fluidity and flexural strength.

Key words: one-part geopolymer, hybrid fiber, composition design, influence effect, flexural strength, microscopic analysis

中图分类号:

TB332

高英力, 熊浩宇, 冯心崚, 朱俊材, 赵福意. 混杂纤维单组分地聚物组成设计及纤维影响效应研究[J]. 硅酸盐通报, 2025, 44(4): 1357-1366.

GAO Yingli, XIONG Haoyu, FENG Xinling, ZHU Juncai, ZHAO Fuyi. Composition Design and Fiber Influence Effects of Hybrid Fiber One-Part Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1357-1366.

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