| Autor: |
Mostafa FEM; Civil Engineering Department, Faculty of Engineering, Fayoum University, Fayoum 2933110, Egypt., Smarzewski P; Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 gen. Sylwestra Kaliskiego, 00-908 Warsaw, Poland., El Hafez GMA; Chemistry Department, Faculty of Science, Fayoum University, Fayoum 2933110, Egypt., Farghali AA; Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni Suef 2722165, Egypt., Morsi WM; Building Physics Research Institute, Housing & Building National Research Center (HBRC), Cairo 11511, Egypt., Faried AS; Civil Engineering Department, Faculty of Engineering, Fayoum University, Fayoum 2933110, Egypt., Tawfik TA; Department of Construction and Building Engineering, High Institute of Engineering, 6th October City 3226010, Egypt.; Institute of Construction and Architecture, Slovak Academy of Sciences, Dúbravská Cesta 9, SK-845 03 Bratislava, Slovakia. |
| Abstrakt: |
The goal of this paper is to investigate the impact of nano-materials on the mechanical and electrochemical properties of self-cleaning concrete. Nano-titanium dioxide and nano-zinc oxide were used as additives for this purpose. Additionally, a comparative study on the effect of using these materials on the self-cleaning concrete's characteristics was conducted. The dosages of nano-titanium dioxide (nps-TiO 2 ) and nano-zinc oxide (nps-ZnO) used were 0, 0.5, 1, 1.5, 2, and 2.5% and 0, 1, 2, and 3% of the weight of the cement, respectively. The results showed that the optimum compressive strength and the lowest corrosion rate were fulfilled at 2.5% of nps-TiO 2 and 1% of nps-ZnO, and using 2.5% of nps-TiO 2 achieved the highest improvement in the corrosion rate. However, 1% for nps-TiO 2 mixtures and 1% for nps-ZnO mixtures were the best ratios for flexural strength. On the other hand, for the corrosion rate, the samples were tested at 2 and 6 months. When nps-TiO 2 and nps-ZnO samples were compared to the control sample, 2.5% and 1% of nps-TiO 2 and nps-ZnO, respectively, showed the largest improvement in resistance to corrosion. Also, the self-cleaning property of the samples containing nano-materials (nps-TiO 2 and nps-ZnO) was tested. As the results illustrated, the self-cleaning property of the samples was increased over time due to photocatalytic degradation. Furthermore, the results of the photocatalytic tests showed that nps-TiO 2 samples outperformed nps-ZnO samples overall. |
