Combined Effects of Sawdust and Building Rubbles as Aggregate on the Concrete

Abstract

Most of building rubbles or wastes  contain some damaged materials such as cement, brick, steel, ceramic, plastic and other substances. Among these materials, ceramic and brick when using both  of them as a partial replacement  by the weight of conventional coarse aggregate in mixture concrete with presence of variety  ratios ( 10% to 30%) for sawdust  as replacement of fine aggregate, the resulting concrete properties will affected. So, this paper was based on the study some properties of concrete that produced of 50% replacement for those rubbles plus to presence  10%, 20% and 30% sawdust for both of  them. The results revealed that present of sawdust with each of type of those rubbles  provides database which are potential to be used in the production of lighter and economical new concrete material. Furthermore, the higher ratios of sawdust (more than 10 %)  lead to obvious affected on the strength as well as other properties. While, those negative effects will perceptible improved when added 10% sawdust in ceramic aggregate concrete compared to brick aggregate concrete.