| Title |
A Study about the Strength and Microstructure of Hardened Cement Pastes Including Nanofibers |
| Authors |
응유옌 트리(Nguyen, Tri N.M) ; 김정중(Kim, Jung Joong) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.2.0177 |
| Keywords |
나노 섬유;미세구조;시멘트;인장강도;압축강도 Nanofibers;Microstructure;Cement;Tensile strength;Compressive strength |
| Abstract |
In this study, the effect of nanofibers in cement pastes on the compressive and tensile strength of hardened cement pastes was studied. Two types of nanofibers, nylon 66 nanofibers and carbon nanotube-nylon 66 hybrid nanofibers, were manufactured by electrospinning methodology and mixed in cement powder respectively. The specimens for experiments were prepared by water to cement ratio of 0.5 and cured in water for 28 days. The effect of nanofibers on the increase of the compressive and tensile strength were confirmed by the experimental results. The well-linking effect of nanofibers in the microstructure of the hardened cement pastes has been found by scanning electron microscope (SEM) analysis and well-explained for the increase in mechanical strength. Besides, field emission transmission electron microscope (FE-TEM) analysis and thermal gravimetric analysis (TGA) have also been conducted to analyze the properties of nanofibers as well as the microstructure of the hardened modified cement pastes. |