Hybrid alkali activated cement (HAAC) is considered as a promising alternative material to Portland cement due to its low carbon emissions and excellent mechanical properties. In this study, HAACs were prepared using 75 % granulated blast furnace slag (GBFS) and/or fly ash (FA) and 25 % Portland cement with external addition of 3%–5% alkali activator. The influence of precursors and Na₂O content on hydration heat, reaction extent and microstructural development were investigated to understand the early hydration kinetics. Through the characterization via XRD quantitative analysis and ²⁹Si NMR spectroscopy, it is shown that increasing the Na₂O content improved the compressive strength and reaction extent gradually despite the hydration process being delayed in the first few hours. The much lower reactivity of FA led to slower hydration rate and lower reaction extent of the HAACs containing more FA, thus reduced compressive strength yet only slightly delayed setting.

由于其低碳排放和优异的机械性能，混合碱活化水泥（HAAC）被认为是一种有前途的硅酸盐水泥替代材料。在这项研究中，HAAC 是使用 75% 粒状高炉矿渣 (GBFS) 和/或粉煤灰 (FA) 和 25% 波特兰水泥以及外部添加 3%–5% 碱活化剂制备的。研究了前体和 Na ₂ O 含量对水合热、反应程度和微观结构发展的影响，以了解早期水合动力学。通过 XRD 定量分析和²⁹ Si NMR 光谱表征，表明增加 Na ₂尽管水化过程在最初的几个小时被延迟，但 O 含量逐渐提高了抗压强度和反应程度。FA 的低得多的反应性导致含有更多 FA 的 HAAC 的水合速率较慢和反应程度较低，从而降低了抗压强度，但仅略微延迟了凝固。