Production and performance characterization of special concrete containing artificial carbon sequestrating aggregate

Abstract

This study investigates the creation of carbon-negative manufactured aggregates sourced from magnesium-based carbonate. The primary objectives encompass studying the factors that govern their mechanical performance and delving into the facets influencing the carbon sequestration capacity of these aggregates. The findings reveal that aggregates made up of CemR3 + CS + GGBS, and 5% carbonate, treated under carbonation curing, display a notable compressive strength of 21.5 MPa while maintaining a carbon-negative status. This research highlights the promise of these aggregates not just in meeting structural needs but also in reducing carbon emissions in construction materials. Moreover, this accomplishment marks a fundamental step forward in the realm of eco-friendly concrete manufacturing. It paves the way for significant advancements in harmonizing carbon negativity with durable mechanical attributes. Implementing Carbon Capture, Utilization, and Storage (CCUS) techniques within this framework stands as a pivotal method to amplify the carbon sequestration capacity of these aggregates, thus driving the progress of sustainable construction materials. To unleash the complete capability of these optimized aggregates, continued exploration is imperative. Nonetheless, in-depth studies will be instrumental in harnessing these aggregates to their maximum efficiency, a critical aspect in the progression of carbon-negative aggregate production.