그래핀 옥사이드, 기능성 탄소 나노 튜브, 나노 실리카 혼입 비율이 시멘트 경화체의 역학적 성능에 미치는 영향

초록

This research investigated the optimal ratio of graphene oxide (GO), functionalized carbon nanotube (f-CNT), and nanosilica (NS) for reinforcing cement paste. The dispersity of the ultrasonicated nanomaterials mixed with Ca(OH)2 solution was measured to assess the dispersion properties of the mixed nanomaterials in cement paste. Furthermore, the compositions of the cement hydrates and the compressive strength of the nanomaterial-reinforced cement pastes with various mixing ratios were evaluated in order to probe which mixing ratio of the three nanomaterials successfully strengthened the cement paste. In addition, the correlation between the dispersity of the nanomaterials and the compressive strength of the nanomaterial-reinforced cement paste was investigated. The triple-hybrid reinforced cement paste with an optimal ratio of 0.04 g of GO, 0.01 g of f-CNT, and 1 g of NS presented an improved compressive strength compared with single- and hybrid-nanomaterial—reinforced cement paste owing to the excellent dispersity of nanomaterials.

키워드