This doctoral thesis thoroughly explores the feasibility of attaining net-zero and carbon-negative transformations in lime-based construction materials, with a particular focus on masonry applications, employing advanced life-cycle assessment modelling. The primary focus lies in the production stage, where the research seamlessly integrates circular economy practices, a transition towards eco-friendlier energy sources, and optimized production systems, leveraging innovative kiln technologies. By successfully implementing these decarbonization strategies throughout the entire life cycle, the study envisions scenarios in which lime-based rendering materials serve as a carbon sink during their utilization phase, leading to carbon-negative transformations.

The research underscores the transformative nature of repositioning CO₂ from a critical emission to a valuable by-product, presenting a notable competitive advantage for the lime industry. Supported by quantitative evidence, the thesis envisages a future where CO₂ evolves into a valuable resource for green energy and sustainable products. To bring this vision to fruition, the thesis proposes a comprehensive action plan finely tuned to environmental objectives within the 2050 European Action Plan, specifically tailored for the lime-based building materials industry. This research not only provides essential insights into sustainable practices but also delineates a strategic roadmap for the lime sector to embrace a more environmentally conscious and economically viable future.