Li Wei-Wen, Ji Wei-Ming, Wang Yao-Cheng, Liu Yi, Shen Ruo-Xu, Xing Feng
Guangdong Key Provincial Durability Center for Marine Structure, Shenzhen Durability Center for Civil Engineering, Department of Civil Engineering, Shenzhen University, Shenzhen 518060, China.
Shenzhen Graduate School of Harbin Institute of Technology, Shenzhen 518055, China.
Materials (Basel). 2015 Dec 14;8(12):8780-8792. doi: 10.3390/ma8125491.
This paper aimed to explore the mechanical properties of a cement-based material with carbon nanotube (CNT) under drying and freeze-thaw environments. Mercury Intrusion Porosimetry and Scanning Electron Microscopy were used to analyze the pore structure and microstructure of CNT/cement composite, respectively. The experimental results showed that multi-walled CNT (MWCNT) could improve to different degrees the mechanical properties (compressive and flexural strengths) and physical performances (shrinkage and water loss) of cement-based materials under drying and freeze-thaw conditions. This paper also demonstrated that MWCNT could interconnect hydration products to enhance the performance of anti-microcracks for cement-based materials, as well as the density of materials due to CNT's filling action.
本文旨在探究含碳纳米管（CNT）的水泥基材料在干燥和冻融环境下的力学性能。采用压汞法和扫描电子显微镜分别分析碳纳米管/水泥复合材料的孔隙结构和微观结构。实验结果表明，多壁碳纳米管（MWCNT）能在不同程度上改善水泥基材料在干燥和冻融条件下的力学性能（抗压强度和抗折强度）及物理性能（收缩率和失水量）。本文还表明，多壁碳纳米管可使水化产物相互连接，增强水泥基材料的抗微裂纹性能，同时由于碳纳米管的填充作用提高材料密度。
