Mechanical and chemical effects of incorporating stone powder residue in mortars

Abstract

The construction industry is actively integrating technological innovations to optimize processes and mitigate solid waste in response to global challenges due to population growth and globalization. In this sense, this work addresses the imperative of sustainable development and waste decrease in construction. The research delves into using solid waste, such as ceramic block waste, granites, and marbles, in concrete and mortar production, highlighting challenges related to porosity and reduced mechanical strength. Additionally, the study investigates the incorporation of fibers to enhance the tensile strength of mortars. The main goal is the analysis of stone waste incorporation in mortar production, replacing 10% of sand, cement, and lime by considering particle size, water absorption, and chemical properties of stone powder. Experimental procedures involved cement of type 2, fine sand, and hydrated lime, with sieving systems applied for sand particle size testing. Compressive strength tests of a set of mortar compositions, including reference and modified proportions, were performed. chemical analysis through X-ray fluorescence (XRF) revealed composition aspects of stone powder and its impact on cementitious composites. Finally, it is advanced insights into compressive strength, particularly when the sand is replaced by stone powder, leading to the potential of stone powder to enhance sustainability in construction practices.