In order to provide theoretical guidance for sulfoaluminate cement as grouting material used for coal mines, the purpose of this paper is to trace the hydration process and study the hydration kinetics of sulfoaluminate cement. The influence of the water/cement ratio (W/C) on the hydration exothermic characteristics of sulfoaluminate cement was studied by TAM air hydration microcalorimeter, Raman spectrum and compressive strength test, respectively. The results show that the rapid hydration of sulfoaluminate cement can be divided into three hydration processes: acceleration period, deceleration period and stability period. With the increase of W/C, the maximum heat release rate of cement decreases, while the cumulative heat release increases. In addition, increasing W/C can affect the microstructure of the cement paste, increase the porosity and further decrease the strength. Meanwhile, the Krstulović–Dabić model was used to analyse the hydration kinetics of sulfoaluminate cement with different W/C. The results show that the hydration mechanism of sulfoaluminate cement is not affected by increasing W/C. The hydration kinetics process can include three stages: nucleation and growth mechanism, phase boundary reaction and diffusion reaction.

中文翻译：

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不同水灰比硫铝酸盐水泥作为煤矿灌浆材料的水化动力学

为了给硫铝酸盐水泥作为煤矿灌浆材料提供理论指导，本文旨在追踪水化过程，研究硫铝酸盐水泥的水化动力学。分别通过TAM空气水化微量热仪、拉曼光谱和抗压强度试验研究了水灰比(W/C)对硫铝酸盐水泥水化放热特性的影响。结果表明，硫铝酸盐水泥的快速水化可分为三个水化过程：加速期、减速期和稳定期。随着W/C的增加，水泥的最大放热率降低，而累积放热量增加。此外，增加 W/C 会影响水泥浆体的微观结构，增加孔隙率并进一步降低强度。同时，采用 Krstulović-Dabić 模型分析了不同 W/C 的硫铝酸盐水泥的水化动力学。结果表明，硫铝酸盐水泥的水化机理不受W/C增加的影响。水合动力学过程可包括三个阶段：成核和生长机理、相界反应和扩散反应。