Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature properties of cement paste with graphene oxide agglomerates
Highlights GO can effectively suppress the pore structure coarsening of cement pastes during heat treatment. Adding GO delays the compressive strengths loss of the cement pastes exposed to high temperatures. The water bound in GO agglomerates is negligible, the interlaminar water content comprises approximately 0.06% of the total weight loss.
Abstract This study investigated the high-temperature properties of cement pastes with graphene oxide (GO) agglomerates at temperatures of 105 °C, 200 °C, 300 °C, and 450 °C. Generally, at ambient temperatures, incorporating GO can refine the pore structures and crystal sizes of calcium hydroxide, which is beneficial for the thermal resistance of a cement paste. In this study, during heat treatment, it was found that the water bound in GO agglomerates is negligible (from conducting a weight loss analysis). The GO agglomerates suppress the pore structure coarsening of cement pastes. The pore structure is finer and the total porosity is reduced by 8.5% with incorporation of 0.04% (by weight) GO at 300 °C which is close to critical point of water. With incorporation of 0.04% by weight GO in cement pastes at 200 °C, 300 °C, and 450 °C, the residual compressive strengths are 9.28%, 12.63%, and 10.83% higher than that of a reference sample, respectively.
High-temperature properties of cement paste with graphene oxide agglomerates
Highlights GO can effectively suppress the pore structure coarsening of cement pastes during heat treatment. Adding GO delays the compressive strengths loss of the cement pastes exposed to high temperatures. The water bound in GO agglomerates is negligible, the interlaminar water content comprises approximately 0.06% of the total weight loss.
Abstract This study investigated the high-temperature properties of cement pastes with graphene oxide (GO) agglomerates at temperatures of 105 °C, 200 °C, 300 °C, and 450 °C. Generally, at ambient temperatures, incorporating GO can refine the pore structures and crystal sizes of calcium hydroxide, which is beneficial for the thermal resistance of a cement paste. In this study, during heat treatment, it was found that the water bound in GO agglomerates is negligible (from conducting a weight loss analysis). The GO agglomerates suppress the pore structure coarsening of cement pastes. The pore structure is finer and the total porosity is reduced by 8.5% with incorporation of 0.04% (by weight) GO at 300 °C which is close to critical point of water. With incorporation of 0.04% by weight GO in cement pastes at 200 °C, 300 °C, and 450 °C, the residual compressive strengths are 9.28%, 12.63%, and 10.83% higher than that of a reference sample, respectively.
High-temperature properties of cement paste with graphene oxide agglomerates
Chen, Ya (Autor:in) / Li, Xiangyu (Autor:in) / Dong, Biqin (Autor:in) / Du, Hongxiu (Autor:in) / Yan, Ruizhen (Autor:in) / Wang, Linhao (Autor:in)
29.12.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017
| British Library Online Contents | 2017