不同聚合物-水泥比例的碳纤维增强聚合物混凝土的力学性能

Mechanical Properties of Carbon Fiber-Reinforced Polymer Concrete with Different Polymer-Cement Ratios.

作者信息

Liu Gao-Jie, Bai Er-Lei, Xu Jin-Yu, Yang Ning

机构信息

Department of Airfield and Building Engineering, Air Force Engineering University, Xi'an 710038, China.

College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi'an 710072, China.

出版信息

Materials (Basel). 2019 Oct 28;12(21):3530. doi: 10.3390/ma12213530.

DOI:10.3390/ma12213530

PMID:31661824

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6862260/

Abstract

To study the effect of redispersible polymer emulsion powder on the mechanical properties of carbon fiber-reinforced polymer concrete (CFRPC), the compressive, flexural, and splitting tests of CFRPC specimens with different polymer-cement ratios (polymer-cement mass ratios) were performed in this study. The modification effect of emulsion powder on CFRPC was analyzed from the perspectives of the strength and deformation properties of the specimens. The results show that the static properties of CFRPC increased first and then decreased with the increase of the polymer-cement ratio, in which the splitting tensile strength had the most significant increase; the flexural strength took second place and the compressive strength had a slight increase. When the polymer-cement ratio was 8%, the flexural and splitting tensile strength of the CFRPC specimens increased significantly by 36% and 61%, respectively. According to electron microscopy images, adding emulsion powder can effectively improve the structure of fiber-matrix transition zones and enhance the bond property between fibers and the matrix.

摘要

为研究可再分散聚合物乳液粉对碳纤维增强聚合物混凝土（CFRPC）力学性能的影响，本研究对不同聚合物 - 水泥比（聚合物 - 水泥质量比）的CFRPC试件进行了抗压、抗弯和劈裂试验。从试件的强度和变形性能角度分析了乳液粉对CFRPC的改性效果。结果表明，CFRPC的静态性能随聚合物 - 水泥比的增加先增大后减小，其中劈裂抗拉强度增幅最为显著；抗弯强度次之，抗压强度略有增加。当聚合物 - 水泥比为8%时，CFRPC试件的抗弯和劈裂抗拉强度分别显著提高了36%和61%。根据电子显微镜图像，添加乳液粉可有效改善纤维 - 基体过渡区结构，增强纤维与基体之间的粘结性能。