Sodium carbonate (SC) activated ground granulated blast-furnace slag (GGBS) and fly ash (FA) is a potential substitute of traditional cement with ultra-low carbon footprint. However, its hydration rate and strength growth are limited, owing to the slow leaching of ions during the activation of weak base. In this work, 60% wet-grinded GGBS and 40% FA were blended as the binder, and two organic alkalis, i.e. triethanolamine (TEA) and triisopropanolamine (TIPA), were adopted to facilitate the ions dissolution and pozzolanic reaction of SC activated GGBS-FA blended cementitious material (SCSF). The compressive strength was tested and the hydration kinetics was studied by hydration heat and chemical shrinkage. Besides, ions leaching behavior was characterized by ICP; hydrates and microstructure were also detected by XRD, TG-DTG and SEM. Results indicated that the addition of TEA or TIPA significantly promoted the ions dissolution. 0.05% TEA increased the concentration of leached Ca²⁺, Al³⁺ and Fe³⁺ by 36%, 33% and 1545%, respectively. This solubilizing effect was also found in TIPA. Moreover, these two chemicals could promote the formation of hydrates, such as C-S(A)-H gel, hydrotalcite, calcite and aragonite, especially at the early period; these also activated the hydration process of SCSF effectively, and the compressive strength of the mortar reached above 40.0 MPa at 7 d and 48.0 MPa at 28 d. The carbon emission of the designed system is 85.9% and 55.9% lower than that of PC and strong base activated GGBS system, respectively.

碳酸钠 (SC) 活化磨碎的高炉矿渣 (GGBS) 和粉煤灰 (FA) 是具有超低碳足迹的传统水泥的潜在替代品。然而，由于弱碱活化过程中离子的缓慢浸出，其水化速率和强度增长受到限制。在这项工作中，将 60% 湿磨的 GGBS 和 40% FA 混合作为粘合剂，并采用两种有机碱，即三乙醇胺 (TEA) 和三异丙醇胺 (TIPA) 来促进 SC 活化的 GGBS 的离子溶解和火山灰反应-FA 混合胶凝材料 (SCSF)。测试了抗压强度，并通过水化热和化学收缩研究了水化动力学。此外，离子浸出行为由ICP表征；XRD、TG-DTG 和 SEM 还检测了水合物和微观结构。结果表明，TEA 或 TIPA 的添加显着促进了离子溶解。0.05% TEA 增加浸出钙浓度²⁺、Al ³⁺和 Fe ^{3+ 分别}增加了 36%、33% 和 1545%。在 TIPA 中也发现了这种增溶作用。此外，这两种化学物质可以促进水合物的形成，如CS(A)-H凝胶、水滑石、方解石和文石，尤其是在早期；这些也有效地激活了 SCSF 的水化过程，砂浆的抗压强度在 7 d 时达到了 40.0 MPa 以上，在 28 d 时达到了 48.0 MPa。所设计系统的碳排放量分别比PC和强碱活化GGBS系统低85.9%和55.9%。