Basic oxygen furnace (BOF) slag, a by-product of the steelmaking process, has never been effectively utilised owing to its various drawbacks. In this study, BOF slag was used as the calcareous raw material of autoclaved aerated concrete (AAC) to successfully and completely replace lime with BOF slag. Moreover, the slurry was regulated with NaOH and a thickening agent, successfully reducing bulk density from the B07 level to the B05 level without reducing mechanical performance. The reaction products of AAC were analysed using X-ray diffraction and scanning electron microscopy. The results demonstrate that the addition of BOF slag can hinder the formation of xonotlite which offsets the other negative effects of BOF slag to a certain extent. In addition, kirschsteinite and part of C₂F were involved in generating tobermorite during the autoclaving process.

碱性氧气炉（BOF）炉渣是炼钢过程的副产品，由于其各种缺点，从未得到有效利用。本研究以转炉渣作为蒸压加气混凝土（AAC）的钙质原料，成功地用转炉渣完全替代了石灰。此外，使用 NaOH 和增稠剂调节浆料，成功地将堆积密度从 B07 水平降低到 B05 水平，而不会降低机械性能。使用 X 射线衍射和扫描电子显微镜分析 AAC 的反应产物。结果表明，加入转炉渣可以阻碍硬硅钙石的形成，在一定程度上抵消了转炉渣的其他负面影响。此外，克氏石和部分 C ₂F 在高压灭菌过程中参与了生成 tobermorite。