Ferrous slag: electric arc furnace slag (EAFS) and ladle furnace slag (LFS); and non-ferrous slag: copper slag (CS) and silicon-manganese slag (SiMnS) have been used as precursors for alkali activated cements (AACs). The objective of the study was to evaluate the effect of the silica modulus (Ms = SiO₂/K₂O) (0.5–1.8) of the potassium silicate/potassium hydroxide solution on the microstructure and technological properties of AACs using individual slags. The results obtained indicate that under the activation conditions used, CS and EAFS are more reactive slags, giving rise to AACs with optimum flexural and compressive strengths of 7.5 and 51.5 MPa and 5.7 and 30.5 MPa for a Ms = 1.4, respectively. While the SiMnS and LFS are less reactive resulting in AACs with flexural and compressive strengths of 3.2 and 11.6 MPa at Ms = 1.4 for SiMnS and 1.1 MPa and 4.6 MPa at Ms = 0.9 for LFS. In all AACs, the development of the alkaline activation reaction is confirmed due to the presence of gel, of different nature and quantity depending on the precursor used. The lower mechanical properties of the AACs using SiMnS and LFS as precursor may also be due to the presence of microcracks. Therefore, this study confirms that ferrous and non-ferrous slags can be used as precursors of AACs, with the type of precursor and the modulus of the activating solution influencing mechanical properties. AACs using CS and EAFS can be used in structural applications, while those using SiMnS and LFS can be used in non-structural applications in civil engineering.

黑色金属渣：电弧炉渣（EAFS）和钢包炉渣（LFS）；和有色金属矿渣：铜矿渣（CS）和硅锰矿渣（SiMnS）已被用作碱活化水泥（AAC）的前体。本研究的目的是评估硅酸钾/氢氧化钾溶液的二氧化硅模量 (Ms = SiO ₂ /K ₂ O) (0.5–1.8) 对使用单独炉渣的加气混凝土的微观结构和工艺性能的影响。所得结果表明，在所使用的活化条件下，CS 和 EAFS 是更具活性的炉渣，当 Ms = 1.4 时，所产生的 AAC 的最佳弯曲和压缩强度分别为 7.5 和 51.5 MPa 以及 5.7 和 30.5 MPa。而SiMnS和LFS的反应性较低，导致SiMnS在Ms = 1.4时AAC的弯曲和压缩强度分别为3.2和11.6 MPa，而LFS在Ms = 0.9时弯曲和压缩强度分别为1.1 MPa和4.6 MPa。在所有 AAC 中，由于凝胶的存在，碱性活化反应的发生得到证实，凝胶的性质和数量取决于所使用的前体。使用 SiMnS 和 LFS 作为前驱体的 AAC 的机械性能较低也可能是由于微裂纹的存在。因此，本研究证实黑色金属和有色金属矿渣可以用作加气混凝土的前驱体，前驱体的类型和活化溶液的模量影响机械性能。使用 CS 和 EAFS 的加气混凝土可用于结构应用，而使用 SiMnS 和 LFS 的加气混凝土可用于土木工程的非结构应用。