Abstract
Cementitious materials are the most widely used construction materials throughout the world. Recently, a number of studies have investigated the significant potential of graphene oxide (GO) for enhancing mechanical properties of cementitious materials and designing new composites. However, there is considerable inconsistency in the results of these studies showing different influences of GO on the mechanical behavior of composites because of the use of different GO materials and preparation conditions. In this study, we investigated the influence of GO contents on the physiochemical and mechanical properties of cement mortar composites. GO-cement mortar composites were prepared using different GO concentrations (i.e. 0-0.5% by weight of cement) and their physical, chemical, and mechanical properties were comprehensively characterized using scanning electron micrographs (SEM), energy-dispersive -ray spectroscopy (ED ), -ray diffraction ( RD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and axial compression and tension tests. Mechanical test results showed that the optimum concentration (i.e. 0.1%) of GO in the cement mortar composite resulted in a 38% and 78% increase in the 28-day tensile and compressive strengths of GO-cement mortar composites compared to that of plain cement mortar composite. It was also found that GO could prevent the crack propagation from the nanoscale to microscale and increase the hydration degree of the cement mortar composites. Furthermore, the inclusion of GO in the composite resulted in the improved accessibility of the water to the GO oxygen functional groups and cement C-S-H component. It was also seen that increasing the dosage of GO above the optimum concentration resulted in several micro-cracks related to restacking and aggregation of GO sheets in cement matrix.
| Original language | English |
|---|---|
| Title of host publication | 20th International Conference on Composite Structures |
| Editors | Antonio J.M. Ferreira, Walid Larbi, Jean-François Deu, Francesco Tornabene, Nicholas Fantuzzi |
| Place of Publication | Paris, France |
| Publisher | Societá Editrice Esculapio |
| Pages | 286-287 |
| Number of pages | 2 |
| Edition | First |
| ISBN (Print) | 978-889-385-041-4 |
| Publication status | Published - Aug 2017 |
| Externally published | Yes |
| Event | 20th International Conference on Composite Structures - Conservatoire national des arts et métiers, Paris, France Duration: 4 Sept 2017 → 7 Sept 2017 Conference number: 20 |
Conference
| Conference | 20th International Conference on Composite Structures |
|---|---|
| Abbreviated title | ICCS20 |
| Country/Territory | France |
| City | Paris |
| Period | 4/09/17 → 7/09/17 |
| Other | Composite materials have aroused a great interest over the last few decades, as proven by the huge number of scientific papers and industrial progress. The increase in the use of composite structures in different engineering practices justify the present international meeting where researches from every part of the globe can share and discuss the recent advancements regarding the use of structural components within advanced applications such as buckling, vibrations, repair, reinforcements, concrete, composite laminated materials and more recent metamaterials. Studies about composite structures are truly multidisciplinary and the given contributions can help other researches and professional engineers in their own field. This Conference is suitable as a reference for engineers and scientists working in the professional field, in the industry and the academia and it gives the possibility to share recent advancements in different engineering practices to the outside world. This book aims to collect selected plenary and key-note lectures of this International Conference. For this reason, the establishment of this 20th edition of International Conference on Composite Structures has appeared appropriate to continue what has been begun during the previous editions. ICCS wants to be an occasion for many researchers from each part of the globe to meet and discuss about the recent advancements regarding the use of composite structures, sandwich panels, nanotechnology, bio-composites, delamination and fracture, experimental methods, manufacturing and other countless topics that have filled many sessions during this conference. As a proof of this event, which has taken place in Paris (France), selected plenary and key-note lectures have been collected in the present book. |
Keywords
- Cementitious materials
- Graphene Oxide (GO)
- Composites
- Cement mortar