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玻璃纤维对普通硅酸盐水泥与硫铝酸盐水泥复合材料的改性机理

Modification Mechanism of Glass Fibers on Ordinary Portland Cement and Sulphoaluminate Cement Composites.

作者信息

Li Jiaxin, Shao Tingquan, Guo Haoyan, Wang Zhenjun, Zhang Ting, Zhai Jianliang, Lei Yu

机构信息

School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.

Shaanxi Union Research Center of University and Enterprise for Advanced Transportation Infrastructure Materials, Xi'an 710061, China.

出版信息

Materials (Basel). 2025 Apr 14;18(8):1785. doi: 10.3390/ma18081785.

DOI:10.3390/ma18081785
PMID:40333473
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12028671/
Abstract

The problems of easy cracking, high brittleness, and low bond strength of ordinary Portland cement and sulphoaluminate cement (OPC-SAC) composites limit their application as rapid repair materials. In this study, glass fibers (GFs) were added to OPC-SAC composites with the content of 0.0-1.5% to improve their properties. Fluidity, mechanical properties, bond properties, and drying shrinkage properties were researched, and their microstructure was characterized by SEM and ICT. Hydration products at different curing ages were studied by XRD and FTIR. The results showed that GFs improved the mechanical properties of OPC-SAC composites. The 28 d flexural strength, compressive strength, and bond strength of specimens with 0.5% GFs reached maximum values, increasing by 22.1%, 12.1%, and 82.9%, respectively, compared with the control group without GFs.. GFs significantly inhibited the drying shrinkage of composites, and the inhibitory effect was magnified with the content of GFs. Adding 0.5% of GFs could reduce the porosity of specimens, decrease the volume proportion of pores (>10 mm), and refine the pore structure. In summary, 0.5% is recommended as the optimal content of GFs to be added into the OPC-SAC composites.

摘要

普通硅酸盐水泥与硫铝酸盐水泥（OPC-SAC）复合材料存在易开裂、脆性高和粘结强度低等问题，限制了其作为快速修复材料的应用。在本研究中，向OPC-SAC复合材料中添加了含量为0.0 - 1.5%的玻璃纤维（GFs）以改善其性能。研究了流动性、力学性能、粘结性能和干燥收缩性能，并通过扫描电子显微镜（SEM）和工业计算机断层扫描（ICT）对其微观结构进行了表征。通过X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）研究了不同养护龄期的水化产物。结果表明，GFs改善了OPC-SAC复合材料的力学性能。含0.5% GFs的试件28 d抗弯强度、抗压强度和粘结强度达到最大值，与不含GFs的对照组相比，分别提高了22.1%、12.1%和82.9%。GFs显著抑制了复合材料的干燥收缩，且抑制效果随GFs含量增加而增强。添加0.5%的GFs可降低试件孔隙率，减少孔径大于10 mm的孔隙体积比例，并细化孔隙结构。综上所述，建议将0.5%作为GFs添加到OPC-SAC复合材料中的最佳含量。

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本文引用的文献

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Glass Fibers Reinforced Concrete: Overview on Mechanical, Durability and Microstructure Analysis.玻璃纤维增强混凝土：力学、耐久性及微观结构分析综述
Materials (Basel). 2022 Jul 22;15(15):5111. doi: 10.3390/ma15155111.
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Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review.纤维素纤维增强地聚合物的耐久性：综述。
Molecules. 2022 Jan 25;27(3):796. doi: 10.3390/molecules27030796.