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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (8): 2794-2805.DOI: 10.16552/j.cnki.issn1001-1625.2026.0178

• 资源综合利用 • 上一篇    下一篇

混掺陶瓷-纤维-橡胶复合砂浆的宏观性能与微观结构分析

徐广(), 杜向琴(), 吴廷杰, 朱元帅, 王春益, 刘兴杰   

  1. 贵州师范大学材料与建筑工程学院,贵阳 550025
  • 收稿日期:2026-02-25 修订日期:2026-03-16 出版日期:2026-08-15 发布日期:2026-09-01
  • 通信作者: 杜向琴,博士,副教授。E-mail:202008004@gznu.edu.cn
  • 作者简介:徐广(1999—),男,硕士研究生。主要从事水泥基复合材料、固体废弃物资源化应用的研究。E-mail:3803571282@qq.com
  • 基金资助:
    贵州省科技计划项目(黔科合基础-ZK〔2023〕一般261)

Macroscopic Properties and Microstructure Analysis of Mixed Ceramic-Fiber-Rubber Composite Mortar

XU Guang(), DU Xiangqin(), WU Tingjie, ZHU Yuanshuai, WANG Chunyi, LIU Xingjie   

  1. School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China
  • Received:2026-02-25 Revised:2026-03-16 Published:2026-08-15 Online:2026-09-01

摘要:

为缓解砂资源日益枯竭问题并改善砂浆的脆性缺陷,本研究利用陶瓷砂、橡胶微粒等质量替代机制砂并外掺聚丙烯纤维(PPF),设计、制作了9组不同配合比的复合砂浆试件。通过流动度测试、力学性能测试,以及扫描电子显微镜(SEM)、能谱仪(EDS)和压汞法孔隙率测试(MIP)试验,研究了陶瓷砂、PPF及橡胶微粒对砂浆工作性能、力学性能和微观结构的影响。结果表明,陶瓷砂替代50%(质量分数)机制砂时,砂浆的流动性不受影响,28 d抗压强度得到提高。复掺PPF与橡胶微粒会降低砂浆的流动度、抗压强度、劈裂抗拉强度及抗折强度,但优化了复合砂浆试件的韧性。陶瓷砂-砂浆界面密实饱满,陶瓷砂替代率为50%时,砂浆的孔隙率、平均孔径和孔隙面积均降低。PPF与橡胶微粒使砂浆界面过渡区变得薄弱,且PPF会增大砂浆的平均孔径及孔隙率,橡胶微粒则细化孔径体积、改善孔径分布,但会增加有害孔数量。

关键词: 砂浆, 陶瓷砂, 聚丙烯纤维, 橡胶微粒, 力学性能, 微观机理

Abstract:

To alleviate the increasing scarcity of sand resources and overcome the inherent brittleness of mortar, this study utilized ceramic sand and rubber particles as partial replacements of mechanism sand by mass and added polypropylene fibers to design and fabricate 9 groups of composite mortar specimens with different mix ratios. Through flowability tests, mechanical property tests, as well as scanning electron microscopy, energy dispersive spectrometer and mercury intrusion porosimetry tests, the effects of ceramic sand, PPF and rubber particles on the workability, mechanical properties and microstructure of mortar were investigated. The results show that when ceramic sand replaces 50% (mass fraction) of mechanism sand, it doesn’t adversely affect the fluidity, and the 28 d compressive strength is improved. The co-addition of PPF and rubber particles reduces the flowability, compressive strength, splitting tensile strength, and flexural strength of mortar, but improves the toughness of the composite mortar specimens. The interface between ceramic sand and mortar is dense and compact. When the replacement rate of ceramic sand is 50%, the porosity, average pore diameter and pore area of the mortar all decrease. The inclusion of PPF and rubber particles weakens the interface transition zone of mortar. Furthermore, PPF increases the average pore diameter and porosity of mortar, while rubber particles refine the pore diameter and improve the pore size distribution, but increase the number of harmful pores.

Key words: mortar, ceramic sand, polypropylene fiber, rubber particle, mechanical property, microscopic mechanism

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