蒸压加气混凝土的孔结构及表征方法研究进展

Development on Pore Structure and Characterization of Autoclaved Aerated Concrete

蒸压加气混凝土因其质轻、保温性好、环保等优点而受到人们的重视。作为一种典型的宏观多孔建筑材料,蒸压加气混凝土的孔结构特征与其微观结构和性能有密切的关系。钙硅比、水料比、铝粉及工艺参数是影响蒸压加气混凝土孔结构的重要因素,孔隙率、孔径分布等孔结构特征与蒸压加气混凝土的强度、吸水性、干燥收缩、导热性能及耐久性等性能有紧密的联系。本文重点阐述了蒸压加气混凝土的孔结构特征及影响孔结构的主要因素,孔结构对蒸压加气混凝土性能的影响,并简述了蒸压加气混凝土孔结构现阶段主要采用的表征方法。

Autoclaved aerated concrete(AAC)has attracted extensive attention due to its better properties of light-weight,high-strength,insulation and pro-environment.As typical macroscopic porous building materials,pore structure of AAC is closely related to its microstructure and performance.The ratio of calcium to silicon,the ratio of water to material,aluminum powder and process parameters have significants impact on the pore structure of AAC.Porosity and pore size distribution are closely related to the properties of AAC such as strength,water absorption,drying shrinkage,thermal conductivity and durability.For pore structure of AAC,the characteristics of pore structure,the factors of influencing pore structure and the impact on the performance are emphatically elaborated.And the characterization methods of pore structure in AAC is briefly introduced.