Study on mechanical properties of mortar blocks using marble dust waste as cement or fine aggregate replacement materials

Abstract

[EN[In the recent years, the use of the binding materials and the substitute materials of different types in addition to cement or to fine aggregate has become very wide in the production of mortars, such as blending of portland cement with marble dust, so it is necessary to investigate the influence of the binder and the substitution material on the mortar properties. In order to assess the performance of this type of mortar, it is important to understand the changes in the mortar properties. The main objective of the research work is to investigate the possibility of utilizing marble dust as a partial replacement of cement or fine aggregate. Several mortar pastes were prepared using marble dust. In order to evaluate the effects of the marble dust on the mechanical behavior, many different mortar mixtures were tested. Mixtures were evaluated based upon cement or sand substitution by the marble powder. The percentage of marble dust that replace the cement or the fine aggregates in this research was 10%, 20% and 30% by volume. Compressive and bending test were performed in order to find the perfect combination of marble dust waste as a replacement material. The main conclusion of the project is that in terms of compressive and tensile strength it can be said with certainty that the optimum proportion when using dry marble dust is S30-D and when using pre-wet marble dust is S10-D.