Affiliation:
1. VAN YÜZÜNCÜYIL ÜNİVERSİTESİ
Abstract
In this study, initial and final setting time, compressive strength, and photon attenuation properties of cement mortar samples produced with 0.5%, 1%, 2%, and 4% nano-scale SiO2 addition were investigated. For this purpose, cement mortar samples were prepared and cured for 1, 2, 7, 28, and 90 days. Increases in compressive strength values were observed in the early curing ages, with a slight decrease of 3.17% and 0.33% for low nano-SiO2 rates (0.5% and 1%) in later ages. In addition, these results were evaluated with Scanning Electron Microscope (SEM) images. In the samples added 4% nano-SiO2, there was a 13.3% and 9.09% reduction in the initial and final setting times, respectively. Furthermore, mass attenuation coefficients were compared for different cure ages. It was aimed to determine the effect of the curing time on the photon attenuation property by adding nano-SiO2 to the concrete.
Publisher
Van Yuzuncu Yil University
Subject
Metals and Alloys,Mechanical Engineering,Mechanics of Materials
Reference24 articles.
1. Beigi, M. H., Berenjian, J., Omran, O. L., Nik, A. S., & Nikbin, I. M. (2013). An experimental survey on combined effects of fibers and nano-silica on the mechanical, rheological, and durability properties of self-compacting concrete. Materials & Design, 50, 1019-1029. doi:10.1016/j.matdes.2013.03.046
2. Behfarnia, K., & Rostami, M. (2017). Effects of micro and nanoparticles of SiO2 on the permeability of alkali activated slag concrete. Construction and Building Materials, 131, 205-213. doi:10.1016/j.conbuildmat.2016.11.070
3. Behfarnia, K., & Salemi, N. (2013). The effects of nano-silica and nano-alumina on frost resistance of normal concrete. Construction and Building Materials, 48, 580-584. doi:10.1016/j.conbuildmat.2013.07.088
4. El-Gamal, S. M. A., Hashem, F. S., & Amin, M. S. (2017). Influence of carbon nanotubes, nanosilica and nanometakaolin on some morphological-mechanical properties of oil well cement pastes subjected to elevated water curing temperature and regular room air curing temperature. Construction and Building Materials, 146, 531-546. doi:10.1016/j.conbuildmat.2017.04.124
5. Elsharkawy, E. R., & Sadawy, M. M. (2016). Effect of gamma ray energies and addition of nano-SiO2 to cement on mechanical properties and mass attenuation coefficient. IOSR Journal of Mechanical and Civil Engineering, 13(6), 17-22.