Nano-tailored multi-functional cementitious composites
| Autor: | Mustafa Şahmaran, Hocine Siad, Oğuzhan Öztürk, Ülkü Sultan Keskin, Gürkan Yıldırım |
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| Přispěvatelé: | Kırıkkale Üniversitesi, KKÜ |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microscope
Materials science Scanning electron microscope Self-healing Nano-silica (NS) 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Industrial and Manufacturing Engineering law.invention law Electrical resistivity and conductivity Nano Self-sensing Composite material Mechanical Engineering 021001 nanoscience & nanotechnology 0104 chemical sciences Compressive strength Carbon nanotubes (CNT) Mechanics of Materials Ceramics and Composites Engineered cementitious composites (ECCs) Cementitious 0210 nano-technology Science technology and society |
| ISSN: | 0005-0962 |
| Popis: | WOS: 000509629400050 This paper explores the effects of single and binary use of nano-additions on the self-sensing and self-healing efficiencies of cementitious composites in achieving a material that combines high mechanical and multifunctional performances. The researchers studied three nano-tailored cementitious compositions incorporating nano-silica (NS), multi-walled carbon nanotubes (CNT) and binary NS/CNT, as well as control composites prepared without nano-additions. The study included compressive strength testing on sound specimens and an evaluation of combined self-sensing/self-healing capabilities with electrical resistivity (ER) measurements conducted before and after preloading and during the self-healing recovery stage. Recovery rates were also evaluated via crack width measurements recorded by video microscope and compared to ER testing results. To account for different self-healing products, microstructural characterization was performed on healed cracks using scanning electron microscopy coupled with EDX (SEM/EDX) and thermo-gravimetric (TG/DTG) analyses. Results show that while the single use of CNT can promote self-sensing and self-healing properties, using binary NS/CNT can significantly enhance these performances. The density and amounts of C-S-H and CaCO3 in healed cracks increased with the addition of nano-materials, especially for the binary NS/CNT. Scientific and Technical Research Council (TUBITAK) of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [114R043, 117M954] The authors gratefully acknowledge the financial assistance of the Scientific and Technical Research Council (TUBITAK) of Turkey provided under projects: 114R043 and 117M954. |
| Databáze: | OpenAIRE |
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