If we look at its composition, concrete is a strong binder, capable of hardening in a mold without any post-curing by firing, and of agglomerating aggregates whose size varies depending on the application. The production of cement, the most widely used binder in modern concrete today—is responsible for nearly 52% of CO₂ emissions in the construction sector.The excessive extraction of aggregates required for its production represents a significant threat to global sand reserves. Moreover, cement-based concrete often delivers performances that exceed actual needs, while demolition waste, mostly reused for road sublayers, is relegated to lower-value applications. All these observations make the near-systematic use of cement concrete environmentally questionable. However, established practices remain influential: designers, builders, and masons tend to default to concrete. It is therefore essential to question the materials that make up concrete and to explore alternative approaches to reduce the environmental footprint of our constructions.This research emerged from the intersection of a project, excavation sites in Morocco—particularly in Casablanca—the vision of a forward-thinking industrialist, and our commitment to eco-responsible materials.This material, extracted from the Moroccan subsoil and used to shape Marrakech, is recyclable, capable of binding heterogeneous materials together, and requires less energy to produce than cement.