Enhancing the permeability and abrasion resistance of concrete using colloidal nano-SiO2 oxide and spraying nanosilicon practices
Highlights • Reducing permeability and enhance the water resistance properties of concrete. • Spraying nanosilicon to surface and treatment in water-diluted nano-SiO 2 oxide. • Comparing mechanical & microstructure properties of treated and untreated concrete. • Nano-SiO 2 as an additive after preparing concrete and during curing process. Abstract By protecting concrete from penetration of aggressive chemicals, low permeability is one of the most important contributory factors to the concrete’s durability. In this paper the effects of nano-SiO 2 particles on concrete permeability are studied through employing the technique of spraying nanosilicon and treatment in the water-diluted nano-SiO 2 oxide. To this end, some mechanical and microstructure properties of concrete are investigated. The results show that the compression strength and the resistance of specimens to water penetration are significantly increased, whether in the mixtures cured in