Six concrete mixes with different proportions of various pozzolanic materials were investigated for the development of high-strength non-autoclaved aerated concrete (NAAC). Fly ash and slag were used as partial cement replacements in order to perform comparative studies on the effects of fly ash and slag on NAAC. Aluminium powder was used as an expanding agent to produce gas in the mixes. The compressive strength of each mix after 7 and 28 d of curing was determined. The microstructure of the pozzolanic cellular concrete was also investigated using scanning electron microscopy. The influence of the pozzolanic materials on the microstructural and macrostructural characteristics of the cellular concrete was assessed. A cement-based concrete mix, with pozzolanic materials as partial replacements of cement and sand, was thus developed for lightweight cellular concrete with a 28 d compressive strength exceeding 17 MPa. The developed foam concrete with relatively high strength is ideal for several structural and non-structural applications.

中文翻译：

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高强度轻质免蒸加气混凝土的开发

研究了六种不同比例的各种火山灰材料的混凝土混合物，以开发高强度的免蒸加气混凝土（NAAC）。粉煤灰和矿渣被用作水泥的部分替代品，以便对粉煤灰和矿渣对NAAC的影响进行比较研究。铝粉用作膨胀剂以在混合物中产生气体。测定固化7和28天后每种混合物的抗压强度。还使用扫描电子显微镜研究了火山灰多孔混凝土的微观结构。评估了火山灰材料对多孔混凝土微观结构和宏观结构特征的影响。水泥基混凝土混合物，火山灰材料可部分替代水泥和沙子，因此开发出了用于28 d抗压强度超过17 MPa的轻质蜂窝混凝土的产品。强度相对较高的已开发泡沫混凝土是多种结构和非结构应用的理想选择。