Corrosion Studies on Ternary Blended High Performance Self-Compacting Concretes Containing Fly Ash and Graphene Oxide

Abstract

Effective utilization of industrial byproducts as mineral admixtures and filler materials in cement concrete has been a practice to develop sustainable construction materials. The use of mineral admixtures like fly ash, silica fume, ground granulated blast furnace slag etc. as a partial replacement of cements have proved to improve the performance characteristics of concrete through reduced porosity and improved mechanical characteristics through pozzolanic effect and filler effect. Moreover, extensive research in the recent period has been mainly focused to study the effect of nano-additions in concrete. The present work was focused to assess the performance of ternary blended high performance self-compacting concretes with varied quantities of graphene oxide additions. Control concrete of M60 grade was designed in correspondence to IS-10262:2019 containing fly ash, and three other concretes mixes were formulated with 0.03%, 0.06% and 0.09% addition of Graphene Oxide (By weight of total cementitious material). The specimens were cast and tested at different ages to determine rheological, mechanical and durability characteristics by evaluating slump flow, Compressive Strength, Split Tensile Strength, Absorption- Desorption characteristics, Rapid Chloride Penetration Test values and resistance to accelerated corrosion cracking. Moreover, the specimens were assessed for corrosion resistance by conducting a cyclic wet – dry test, where parameters like UPV & depth of chloride penetration in concrete were measured. Results depict the fact that addition of Graphene Oxide improves the durability characteristics to a great extent. The optimum results for most of parameters were obtained at 0.06% of Graphene Oxide addition in comparison to remaining mix proportions.