Properties of Papercrete Concrete Containing Crushed Concrete Waste As Coarse Aggregate

Abstract

Researches on the effect of waste recycling in the concrete industry are increasing due to its low cost as well as considering it as a significant method for protecting the environment by minimizing solid waste. This research evaluates the possibility of using concrete waste as partial replacement with coarse aggregate in Papercrete, and its effect on some concrete properties which include compressive strength, splitting tensile strength and heating resistance. Wasted paper used in this study as an additional material with three various ratios (5%, 10% and 15% by weight of cement) was mixed with concrete which have 0, 10%, 20% and 30% of concrete waste as a partial replacement of the coarse aggregate to produce twelve concrete mixtures. As compared with the plain mixture, it was found that workability decreasing with the increasing of both wasted paper and wasted concrete content. The study illustrated that the optimum percentage of adding wasted paper and wasted concrete replacement are 5% and 10% respectively, due to increasing in both compressive and tensile strength by 11.99% and 13.54% respectively compared with the plain mix. The residual strength of concrete after heat exposure was affected significantly by the increasing of wasted paper content.