University of Tabriz Journal of Civil and Environmental Engineering 2008-7918 47 89 2018 02 20 The Effect of Steel Fibers and Nano-Silica on the Structural Lightweight Concrete Built with Different Combinations of Leca and Perlite The Effect of Steel Fibers and Nano-Silica on the Structural Lightweight Concrete Built with Different Combinations of Leca and Perlite 75 84 7197 FA Yaghoub Mohammadi Department of Civil Engineering, University of Mohaghegh Ardabili Mohsen Dadashi University of Mohaghegh Ardabili Journal Article 2018 03 12      In this paper, our concern is to produce light-weight concrete with using different ingredients in the concrete mix. Specimens were satisfied the density and strength regulators of structural lightweight concretes. The final aim is to increase ultimate strength and effects of added Nano-silica and steel fiber on the mechanical behavior. Nano-silica increases tensile compression and flexural strength with improving the concrete structure (Quercia et al. 2010). In the other hand, using steel fibers reduces the crack width and parallelize their orientation by bridging between microcracks (Qing et al. 2007).      In this paper, our concern is to produce light-weight concrete with using different ingredients in the concrete mix. Specimens were satisfied the density and strength regulators of structural lightweight concretes. The final aim is to increase ultimate strength and effects of added Nano-silica and steel fiber on the mechanical behavior. Nano-silica increases tensile compression and flexural strength with improving the concrete structure (Quercia et al. 2010). In the other hand, using steel fibers reduces the crack width and parallelize their orientation by bridging between microcracks (Qing et al. 2007). https://ceej.tabrizu.ac.ir/article_7197_919c48eda1b4229e2887c967cf9a57f9.pdf