Experimental Study on Compressive Strength of Magnesium Oxychloride Cement Mortar Using Stone Crushed Powder by Varying Molar Ratio

Abstract

Abstract: One of the major consumers of natural resources and a significant contributor to CO2 emissions is the construction sector. The manufacture of cement and building materials was found to be the source of the highest greenhouse gas emissions. In order to lessen the damaging effects of the building industry on the environment, this paper seeks to determine whether magnesium oxychloride cement (MOC) may be used as a mortar substitute for regular Portland cement. A thorough review of the literature, an experimental investigation, and an internal structure analysis based on the ideal molar ratio are all part of the research technique. In this study, MOC cement with powdered stone is experimentally investigated utilizing various molar ratios with phases 3 and 5. In the first set of results usage of unheated magnesium oxide powder, SEM image shown some amount of MgO left inactive and compressive strength depicted lower values. Eventually, a modification was implemented in order to boost compressive strength. In order to improve the reaction or gel formation that would boost the compressive strength, the MgO powder was heated and added to the cement. Different molar ratios produced various compressive strength values in the mortar cubes. Two ideal molar ratios are chosen from each phase, SEM and EDXA are used to analyse the micro structure. The MgO6 octahedral crystal structures of Phases 3 and 5 are visible in the SEM pictures as double and tripple ribbons of shared edges with water molecules and chloride anions. The percentage of elemental weight in the specimens is displayed by EDXA.