Dedolomitization of dolostone filler: Modifying the course of Mg with SCM

Abstract

This study examines the stability of dolomitic filler (DF), both in isolation and in interaction with supplementary cementitious materials (SCMs), when immersed in water media at different pH at 40 °C. Additionally, the interaction of DF with Portland cement (PC) is analyzed. In the presence of SCMs or PC, results reveal that DF undergoes dedolomitization in alkaline environments, which confirms the absence of brucite in this process. As corroboration, the volumetric stability of mortar bars containing 20 wt% DF is demonstrated and the compressive strength remained after immersion in pore water at 40 °C for 5 years.