With the advantages of rapid setting, high strength and durability properties, calcium sulfoaluminate (CSA) cement is usually used as rapid repairing materials and grouting materials in building and other engineering projects. In order to improve the physical properties of CSA grouting materials, the effect of adding sodium aluminate and quicklime was investigated through hydration heat, DTA-TG, XRD and SEM. Their effects on the kinetics of ettringite formation in CSA grouting materials were analyzed. The results show that with the increase of sodium aluminate in Slurry A (CSA cement paste) from 0% to 1.5% (by weight of CSA cement), the setting time of the grouting materials gradually shortened, the compressive strength at early ages (2 h and 3 days) fast increased, but the compressive strength at 28 days decreased continuously. The greatest compressive strength was achieved in the mix with 20% quicklime and 80% anhydrite in Slurry B (quicklime + anhydrite paste). The results from hydration heat, DTA-TG and XRD show that the formation of ettringite (AFt) was accelerated at early ages by sodium aluminate and quicklime, and quicklime could accelerate the formation of AFt at all ages. It was found that sodium aluminate only accelerated the early formation of ettringite but did not affect the overall amount of hydration products, and the initial accelerated hydration could provide a proper structural layout for the later strength development.

硫铝酸钙（CSA）水泥具有快速凝固、高强度和耐久性能等优点，通常用作建筑和其他工程项目的快速修补材料和灌浆材料。为改善CSA灌浆材料的物理性能，通过水化热、DTA-TG、XRD和SEM研究了添加铝酸钠和生石灰的效果。分析了它们对 CSA 灌浆材料中钙矾石形成动力学的影响。结果表明，随着A浆（CSA水泥浆）中铝酸钠的添加量从0%增加到1.5%（以CSA水泥重量计），灌浆材料的凝结时间逐渐缩短，早期抗压强度（2 h 和 3 天）快速增加，但 28 天抗压强度持续下降。在浆料 B（生石灰 + 硬石膏浆料）中含有 20% 生石灰和 80% 硬石膏的混合物中获得了最大的抗压强度。水化热、DTA-TG和XRD结果表明，铝酸钠和生石灰在早期加速了钙矾石(AFt)的形成，而生石灰在各个年龄阶段都能加速AFt的形成。研究发现，铝酸钠仅加速钙矾石的早期形成，不影响水化产物总量，初期加速水化可为后期强度发展提供合适的结构布局。DTA-TG和XRD表明，铝酸钠和生石灰在早期加速钙矾石（AFt）的形成，而生石灰在所有年龄都可以加速AFt的形成。研究发现，铝酸钠仅加速钙矾石的早期形成，不影响水化产物总量，初期加速水化可为后期强度发展提供合适的结构布局。DTA-TG和XRD表明，铝酸钠和生石灰在早期加速钙矾石（AFt）的形成，而生石灰在所有年龄都可以加速AFt的形成。研究发现，铝酸钠仅加速钙矾石的早期形成，不影响水化产物总量，初期加速水化可为后期强度发展提供合适的结构布局。