Behavior of multi-walled carbon nanotubes on the porosity and microstructure of cement-based materials |
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Authors: | Thanongsak NochaiyaArnon Chaipanich |
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Affiliation: | Advanced Cement-Based Materials Research Unit/Cement and Concrete Research Laboratory, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, 239 Huay Gaew, Suthep, Chiang Mai 50200, Thailand |
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Abstract: | The porosity and microstructure of a Portland cement-multi-walled carbon nanotube composite were investigated. Multi-walled carbon nanotubes (CNTs), up to 1 wt.% of cement, synthesized by infusion chemical vapor deposition, and Portland cement type I (PC) were used to produce pastes with a water to cement ratio of 0.5. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were used to characterize Portland cement-CNTs systems. MIP analysis of the results indicates that total porosity of the mixes with CNTs was found to decrease with increasing CNTs content. Moreover, an important effect of additional CNTs was a reduction in the number of mesopores, while SEM technique showed dispersion of CNTs between the hydration phases of Portland cement pastes. |
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Keywords: | Cement Carbon nanotubes Nano additives Microstructure Mercury intrusion porosimetry |
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