Foamed concrete is highly porous, and the pores inside the material improve the insulation performance. However, the material strength decreases with increasing pores (porosity). To enhance the mechanical properties of the material without reducing porosity, the solid matrix of foamed concrete can be adjusted. For this purpose, several foamed cementitious specimens with various supplementary cementing materials (SCMs) and compositions were produced and investigated to evaluate the effect of SCMs on the microstructures of foamed cement paste. In addition to the specimen with cement only, SCMs such as fly ash and silica fume were used to produce foamed cementitious specimens with increased strength. To compare the effect of the water/binder ratio on the microstructure characteristics, a set of specimens was prepared with varying water/binder ratios. The microstructures of the foamed cementitious specimens with the various SCMs were analyzed using three different approaches: X-ray diffraction, scanning electron microscopy, and X-ray micro-computed tomography. The results from those approaches as complementary tools demonstrated that pozzolanic SCMs can improve the material strength of foamed cement paste by increasing the amount of C-S-H or Si phases. In addition, the microstructural investigation also confirmed that the water/binder ratio affects the degree of hydration.

泡沫混凝土的孔隙率很高，并且材料内部的孔隙改善了隔热性能。但是，材料强度随着孔（孔隙率）的增加而降低。为了在不降低孔隙率的情况下增强材料的机械性能，可以调节泡沫混凝土的固体基质。为此，生产了几种带有各种辅助胶结材料（SCM）和组成的泡沫水泥样品，并进行了研究，以评估SCM对泡沫水泥糊的微观结构的影响。除了仅含水泥的标本外，还使用粉煤灰和硅粉等SCM生产强度更高的泡沫水泥样品。为了比较水/粘合剂比率对微观结构特征的影响，制备了一组具有变化的水/粘合剂比率的样品。使用三种不同的方法分析了具有各种SCM的泡沫水泥样品的微观结构：X射线衍射，扫描电子显微镜和X射线微计算机断层扫描。这些方法作为补充工具的结果表明，火山灰SCM可以通过增加CSH或Si相的含量来提高泡沫水泥浆的材料强度。另外，微观结构研究还证实水/粘合剂比率影响水合度。这些方法作为补充工具的结果表明，火山灰SCM可以通过增加CSH或Si相的含量来提高泡沫水泥浆的材料强度。另外，微观结构研究还证实水/粘合剂比率影响水合度。这些方法作为补充工具的结果表明，火山灰SCM可以通过增加CSH或Si相的含量来提高泡沫水泥浆的材料强度。另外，微观结构研究还证实水/粘合剂比率影响水合度。