Mechanical and electrical properties of hydraulic lime pastes reinforced with carbon nanomaterials
| Autor: | Stavros K. Kourkoulis, Christina-Margarita Charalampidou, Angeliki-Eirini Dimou, Zoi S. Metaxa, Ioannis Karatasios, Nikolaos D. Alexopoulos, Georgios Asimakopoulos |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Graphene Hydraulic lime Oxide 02 engineering and technology Carbon nanotube engineering.material 021001 nanoscience & nanotechnology law.invention Nanomaterials chemistry.chemical_compound 020303 mechanical engineering & transports Compressive strength 0203 mechanical engineering Flexural strength chemistry law engineering Composite material 0210 nano-technology Metakaolin Earth-Surface Processes |
| Zdroj: | Procedia Structural Integrity. 28:1694-1701 |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2020.10.144 |
| Popis: | The aim of the present work is to study a binary paste matrix applied for the development of Cultural Heritage restoration mortars, which incorporates modified carbon nanomaterials as reinforcement. In specific, a mixture of natural hydraulic lime and metakaolin was examined. The incorporation of two different, nanomaterials was studied, namely reduced graphene oxide and carboxylated carbon nanotubes. Both types of nano-reinforcement were added at a concentration of 0.15 wt % of the binder. The pastes were studied through mechanical tests (compression, flexure), as well as electrical resistance measurements. The mechanical tests showed that the flexural strength is significantly increased when the carboxylated carbon nanotubes are added, due to the anchoring capability of the nanotubes. The addition of reduced graphene oxide increases the compressive strength of the paste, while for both nano-reinforcements a decrease in electrical resistance is recorded that indicates a good distribution of the electrically conductive nanomaterials within the binder, forming an efficient electrical network. The experimental test results strongly indicate the potential use of the nano-composite binder for the structural health monitoring of cultural heritage architectural monuments. |
| Databáze: | OpenAIRE |
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