Strength Based Comparative Study of Green Concrete

Abstract

Green concrete may be a revolutionary topic within the history of concrete trade. It is a kind of concrete that resembles the standard concrete however, the assembly or usage of such concrete needs minimum quantity of energy and causes least damage to atmosphere. Recycled coarse mixture may be employed by partly substitution natural concrete aggregates, so construction and demolition waste may be more used for aggregates in new construction. Recycled coarse aggregate includes brick, tile aggregates, crushed stone aggregates, glass aggregates, and demolished aggregates. In this paper, different recycled aggregates are used by 40 and 60% replacement with natural aggregates of size 20 mm. Granite stone, brick stone, concrete debris are used as recycled coarse aggregates (RCA) in this experimental work. Ordinary Portland Cement is replaced by 30% with fly ash and 10% replacement of silica fume is used, respectively. Test results show that under the equivalent mix proportions, the workability decreases with an increment in the recycled coarse aggregate as replacement percentages. Test results show that if government implements the projects for temporary shelters for those which are affected by natural disaster, this type of material can be used for economic feasibility.

Keywords: Green concrete, Brick stone, Concrete debris, Fly ash, Silica fume, Workability, Compressive strength