Certain drawbacks of alkali-activated slag (AAS) concrete, such as rapid reactions releasing substantial heat and higher drying shrinkage, limit its application in practice. This work investigated controlling the hardening temperature, shrinkage, and cracks by means of low-temperature preparation technology. The effects of different curing procedures on the hardening temperature, drying shrinkage, mechanical properties, and microstructures of AAS concretes were determined. The hardening temperature of the AAS concretes could be significantly reduced by using low-temperature preparation technology, which could improve the compressive strength of the NaOH- or 1.0 M waterglass-activated slag concretes, but had a slight adverse effect on the flexural strength. X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) results demonstrated that katoite phases and gypsum were generated from the NaOH activated slag concretes prepared by low-temperature technology, which was contributed to the reduction in the drying shrinkage. Meanwhile, the microcrack densities of the concretes prepared in this manner were significantly reduced.

碱活化矿渣（AAS）混凝土的某些缺点，例如快速反应释放大量的热量和较高的干燥收缩率，限制了其在实践中的应用。这项工作研究了通过低温制备技术控制硬化温度，收缩和裂纹的方法。确定了不同固化程序对AAS混凝土的硬化温度，干燥收缩，机械性能和微观结构的影响。低温制备技术可以显着降低AAS混凝土的硬化温度，可以提高NaOH或1.0 M水玻璃活化矿渣混凝土的抗压强度，但对挠曲强度有轻微的不利影响。X射线衍射（XRD）和能量色散X射线光谱（EDS）结果表明，采用低温技术制备的NaOH活性矿渣混凝土产生了钙钛矿相和石膏，这有助于减少干燥收缩率。同时，以这种方式制备的混凝土的微裂纹密度显着降低。