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材料导报  2025, Vol. 39 Issue (10): 24050176-7    https://doi.org/10.11896/cldb.24050176
  无机非金属及其复合材料 |
纤维特性对磷酸镁基免蒸压加气混凝土性能的影响
陈畅*, 丁学成, 酒少武, 陈延信
西安建筑科技大学材料科学与工程学院,西安 710055
Effect of Fiber Performance on Properties of Magnesium Phosphate-based Non-autoclaved Aerated Concrete
CHEN Chang*, DING Xuecheng, JIU Shaowu, CHEN Yanxin
College of Materials Science and Engineering, Xi′an University of Architecture & Technology, Xi’an 710055, China
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摘要 免蒸压加气混凝土(NAAC)存在强度低和易开裂的问题。本工作采用磷酸镁水泥(MPC)作为基体制备磷酸镁基免蒸压加气混凝土(MPC-NAAC),通过添加聚丙烯纤维和玻璃纤维对其进行增强,系统研究了纤维长度和掺量对其物理、力学和耐水性能的影响;并采用X射线衍射仪和扫描电镜分析其微观结构,揭示了纤维的增强机理。研究结果表明:纤维可以在降低MPC-NAAC干密度的同时提高其抗压和抗折强度,聚丙烯纤维和玻璃纤维的最佳长度均为9 mm,最佳掺量均为0.1%。此时,聚丙烯纤维增强的MPC-NAAC抗压和抗折强度较对照组分别提高了5.95%和16.46%;玻璃纤维增强的MPC-NAAC抗压和抗折强度较对照组分别提高了12.70%和11.39%。此外,纤维与基体之间的作用是物理作用,聚丙烯纤维表现出拔出破坏机制,玻璃纤维表现出断裂破坏机制。
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陈畅
丁学成
酒少武
陈延信
关键词:  磷酸镁水泥  纤维长度  纤维掺量  力学性能  微观结构    
Abstract: Non-autoclaved aerated concrete has problems of low strength and easy cracking. In this work, magnesium phosphate cement was used as the matrix to fabricate the magnesium phosphate-based non-autoclaved aerated concrete (MPC-NAAC). The effects of length and content of polypropylene and glass fibers on the properties of MPC-NAAC were systematically investigated. The microstructure was analyzed by X-ray diffractometer and scanning electron microscope to reveal the reinforcement mechanism of the fibers. The results showed that the fibers can improve the compressive and flexural strengths of MPC-NAAC and reduce its dry density. The optimum length and content of both polypropylene and glass fibers were 9 mm and 0.10%, respectively. With this optimum length and content, the compressive and flexural strengths of polypropylene fiber-reinforced MPC-NAAC increased by 5.95% and 16.46%, respectively; and the compressive and flexural strengths of glass fiber-reinforced MPC-NAAC increased by 12.70% and 11.39%, respectively. In addition, the interaction between the fibers and the matrix was physical. A pull-out damage mechanism was exhibited for the polypropylene fiber-reinforced MPC-NAAC and a fracture damage mechanism was exhibited for the glass fibers-reinforced MPC-NAAC.
Key words:  magnesium phosphate cement    fiber length    fiber content    mechanical properties    microstructure
出版日期:  2025-05-25      发布日期:  2025-05-13
ZTFLH:  TU528  
基金资助: “十四五”国家科技重点项目(2022YFC3801401);安徽省科技重点项目(2021e03020003);陕西省创新能力支撑计划项目(2021TD-53)
通讯作者:  *陈畅,博士,西安建筑科技大学材料科学与工程学院副教授、硕士研究生导师。目前主要从事复合材料、相变材料、多孔材料等方面的研究。changchen420@xauat.edu.cn   
引用本文:    
陈畅, 丁学成, 酒少武, 陈延信. 纤维特性对磷酸镁基免蒸压加气混凝土性能的影响[J]. 材料导报, 2025, 39(10): 24050176-7.
CHEN Chang, DING Xuecheng, JIU Shaowu, CHEN Yanxin. Effect of Fiber Performance on Properties of Magnesium Phosphate-based Non-autoclaved Aerated Concrete. Materials Reports, 2025, 39(10): 24050176-7.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24050176  或          https://www.mater-rep.com/CN/Y2025/V39/I10/24050176
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