Alkali activated foams have been extensively studied in recent years, due to their high performance and low environmental footprint compared to foams produced via other methods. Three types of fly ash differing in chemical and mineralogical composition and specific surface were used to synthesize alkali activated foams. Sodium perborate monohydrate was added as a foaming agent and sodium dodecyl sulphate as a stabilizing agent. Foams were characterized at room temperature and after exposure to an elevated temperature (1,000°C). Densities from 1.2 down to 0.3 g/cm³ were obtained, depending on the type of fly ash and quantity of foaming agent added. Correspondingly, compressive strength ranged from 1 to 6 MPa. Comparing all three fly ashes the most favorable results, in terms of density and corresponding compressive strength, were achieved from the fly ash with the highest amounts of SiO₂ and Al₂O₃, as well as the highest amorphous phase content i.e., RI fly ash. Furthermore, after firing to 1,000°C, the density of samples prepared using fly ash RI remained approximately the same, while the compressive strength increased on average by 50%. In the other two types of fly ash the density increased slightly after firing, due to significant shrinkage, and compressive strength increased by as much as 800%. X-ray powder diffraction analysis confirmed the occurrence of a crystallization process after firing to 1,000°C, which resulted in newly formed crystal phases, including nepheline, sodalite, tridymite, and gehlenite.

与生产的泡沫相比，由于其高性能和低环境足迹，近年来对碱性活性泡沫进行了广泛的研究。 通过其他方法。使用三种化学和矿物组成以及比表面积不同的粉煤灰来合成碱活化泡沫。加入过硼酸钠一水合物作为发泡剂，加入十二烷基硫酸钠作为稳定剂。在室温下以及暴露于高温（1,000°C）后对泡沫进行表征。根据飞灰的类型和所添加的发泡剂的量，获得的密度为1.2至0.3 g / cm ³。相应地，抗压强度为1至6MPa。比较所有三种粉煤灰，从密度和相应的抗压强度方面来看，最有效的结果是由粉煤灰中含有最多的SiO ₂和Al ₂ O _{3组成的。}，以及最高的非晶相含量，即RI飞灰。此外，在烧至1,000℃后，使用粉煤灰RI制备的样品的密度保持大致相同，而抗压强度平均提高了50％。在其他两种类型的粉煤灰中，由于明显的收缩，其密度在燃烧后略有增加，抗压强度提高了多达800％。X射线粉末衍射分析证实，煅烧至1000°C后会发生结晶过程，从而导致新形成的晶相，包括霞石，方钠石，鳞石英和方晶石。