The low environmental impact of earth – or soil – materials makes them interesting alternatives to lower CO₂ emissions from the construction sector. Nevertheless, since they are often stabilized with Portland cement, the improvements in technical performance come at an environmental cost. In this paper, we revisit a vernacular stabilization technique to formulate a trass-gypsum-lime binder aiming at increasing strength and reducing environmental impact. To do so, we tailor the binder reaction product assemblage and make use of local low-footprint raw materials. The increase in the trass content in the binder – at the expense of the content of gypsum hemihydrate – resulted in improved hydrated phase assemblage, i.e., ettringite, C-A-S-H, higher compressive strength, and lower carbon footprint. An additional strength gain was obtained by adding a low sucrose dosage to the binder, which ultimately resulted in an optimized strength/impact relation. This approach offers a new perspective on the engineering of binders for earth-based construction.

地球（或土壤）材料对环境的低影响使它们成为降低 CO _{2的有趣替代品}建筑行业的排放。然而，由于它们通常用波特兰水泥稳定，因此技术性能的改进是以环境为代价的。在本文中，我们重新审视了一种乡土稳定技术，以制定一种旨在提高强度和减少环境影响的石膏-石灰粘合剂。为此，我们定制了粘合剂反应产品组合，并利用当地的低足迹原材料。粘合剂中杂草含量的增加——以石膏半水合物的含量为代价——导致改善的水合相组合，即钙矾石、CASH、更高的抗压强度和更低的碳足迹。通过向粘合剂中添加低剂量的蔗糖，获得了额外的强度增益，这最终导致了优化的强度/冲击关系。