Fracture and permeability properties of glass fiber reinforced self-compacting concrete with and without nanosilica

摘要

This article studied the influence of utilizing nanosilica (NS) and glass fiber (GF) on mechanical and permeability properties of self-compacting concrete (SCC) with fly-ash blended. There were three SCC series designed. This study had a constant amount of water-to-binder (w/b) ratio and total binder content which is 0.35 and 550 kg/m(3), respectively. This study utilized three different percentages of nanosilica to replace cement. These percentages were 0%, 2%, and 4% by weight, respectively. The incorporation of fly ash (FA) was done by using 25% of total binder content by weight in all the SCC mixtures. Moreover, glass fiber was used as an additive material with levels of 0%, 0.35%, 0.70%, 1.0%, and 1.5%, respectively. To experimentally evaluate mechanical properties; compressive strength; static modulus of elasticity; splitting tensile strength; fracture energy, and the permeability properties of the mixtures; sorptivity index; rapid chloride permeability test (RCPT); gas permeability test were done. The results showed that with utilizing nanosilica which ranged from 0% to 4% with replacement up until 0.7% glass fiber, indicated to enhance the mechanical and permeability properties of self-compacting concrete. (C) 2019 Elsevier Ltd. All rights reserved.