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http://dx.doi.org/10.14190/JRCR.2022.10.4.489

Evaluation on the Mechanical Performance and Microstructure of Cement Pastes Using Carbon Nanotube  

Chae-Ik, Lim (Dept. of Civil Engineering, Kunsan National University)
Se-Ho, Park (Dept. of Civil Engineering, Kunsan National University)
Won-Woo, Kim (Korea Institute of Civil engineering and Building Technology)
Jae-Heum, Moon (Korea Institute of Civil engineering and Building Technology)
Seung-Tae, Lee (Dept. of Civil Engineering, Kunsan National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.4, 2022 , pp. 489-497 More about this Journal
Abstract
In this study, the fluidity, mechanical properties and microstructure of cement pastes with carbon nanotube (CNT) were experimentally investigated. The 6 types of cement paste mixes with different PCE:CNT and w/b had been manufactured, and several tests including flow, compressive strength, absorption and water porosity were performed on cement pastes with or without CNT.Additionally, microstructural observations such as x-ray diffraction (XRD) and scanning electron microscopy (SEM) were carried out to examine hydrates formed in cement paste with CNT. As a result, it was found that the performance of cement pastes with CNT was better compared to that of control cement paste (OPC) due to both of hydration acceleration effect and filling effect. Furthermore, the SEM images clearly showed that CNT can bridge cracks formed in cement matrix. Conclusively, it is believed that the CNT, if mixed appropriately, could be an option as nono-materials to improve performance of concrete structures.
Keywords
Mechanical performance; Microstructure; Carbon nanotube; Cement paste;
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