Investigation on the Mechanical Properties of a Cement-Based Material Containing Carbon Nanotube under Drying and Freeze-Thaw Conditions

Materials

Wei-Wen Li²  Wei-Ming Ji²  Yao-Cheng Wang²  Yi Liu²  Ruo-Xu Shen¹  Feng Xing² 

[1] Shenzhen Graduate School of Harbin Institute of Technology, Shenzhen 518055, China;Guangdong Key Provincial Durability Center for Marine Structure, Shenzhen Durability Center for Civil Engineering, Department of Civil Engineering, Shenzhen University, Shenzhen 518060, China;

关键词: carbon nanotube (CNT);    cement-based material;    mechanical property;    durability;    drying;    freeze-thaw;   

DOI  :  10.3390/ma8125491

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.