Durability Characteristics of Slag / Fly Ash Based Alumina Silicate Concrete at Ambient Temperature

Abstract

To diminish the environmental pollution in the making of conventional concrete using cement, an urgent demand to use other materials to manufacture concrete is required. In this current situation, the advanced material such as alkali-activated concrete is to be replaced for concrete, which are the combinations of ingredients containing Ground Granulated Blast Furnace Slag (GG BFS), Fly ash.(FA) These mineral admixtures contains rich amount of aluminium and silicon. This article presents the results on Strength, Water absorption and Water Penetrability, Sorptivity and Resistance against Chloride Ion Penetration Test (RCPT) of Alumina Silica Concrete based on GGBFS blended with fly ash. GGBFS is partially substituted with various combinations of Zero to fifty percentages in a standard concentration of 12 M under ambient curing. From the experimental investigation, the robustness of alkali activated concrete (GGBFS alone) performing better in comparison to alkali activated concrete with GGBFS blended with FA. Same results are also observed in water absorption and sorptivity related properties. In the replacement levels, 40% replacement (GPC-E) performed better compared to other replacement levels. Thus, alumina silicate concrete with partial substitution of 40 percentage of fly ash to GGBFS is the precise level of substitution which satisfies the above mentioned durable parameters as it is cheaper than GGBFS.