The “circular model” approach to contemporary urban systems is an evolving economic development concept that has changed production and consumption patterns in various sectors, particularly in construction, which has always represented significant amounts in terms of energy and emissions. Its main purpose is to optimize the flow of materials, energy, and services, as well as to massively decarbonize buildings across their entire value chain. In particular, it breaks with the traditional linear approach by promoting the regenerative loop thus enabling sustainable consumption and an optimal life cycle for buildings. However, initiatives at this stage cannot be taken in isolation; stakeholders in the value and supply chain, design, operation, and construction must collaborate to harmonize their actions in an integrated model, which highlights building performance simulation's capabilities and building information modeling to enhance the cross-functional commitments of stakeholders for a circular and efficient built environment. This article proposes reactive pozzolan as a local aggregate elaborated in the form of sustainable cement, an important trend in architectural theory that is gradually being adopted as a composite thermal insulator and providing significant support for the circular economy. A laboratory test was carried out and approved with a dynamic analysis of heating performance for two distinct climate zones in Morocco, using cooperation between Revit and gbxml and Energy Plus. The results show a significant reduction in energy consumption for cooling and heating and highlight the workflow's ability to manage material assessment from the early stages of construction as part of a detailed sustainable analysis.