Abstract
The regularities of obtaining foamed alkali-activated geopolymer materials based on different wastes of coal power engineering (fly ash, fuel (boiler) slag, ash, and slag mixture) were considered. The phase composition of the studied waste showed the presence of a significant amount of the amorphous phase, as well as a crystalline phase. mostly in the form of high quartz. The microstructure of studied the waste showed that the fly ash consisted of monodisperse hollow aluminosilicate microspheres, the fuel slag was represented by polydisperse irregular particles, and the ash and slag mixture included both of these materials in different ratios. Blowing agents such as aluminum powder, hydrogen peroxide, and sodium hypochlorite were chosen to achieve the porous structure of the geopolymer materials. The calculations of the geopolymer precursor compositions were carried out. Samples were synthesized, and their physical and mechanical properties, such as density, strength, porosity, and thermal conductivity, were analyzed. The micro- and macrostructure of the samples, as well as the pore distribution of the obtained geopolymers were studied. Conclusions were made on the choice of the most-optimal foaming agent and the optimal coal combustion waste suitable for the synthesis of the geopolymer materials.
Subject
General Materials Science
Reference47 articles.
1. Processing of ash and slag waste from coal-fired power plants into functional geopolymer materials;Yatsenko;IOP Conf. Ser. Earth Environ. Sci.,2022
2. Utilization of coal fly ash in China: A mini-review on challenges and future directions;Luo;Environ. Sci. Pollut. Res.,2021
3. Solid fuel combustion wastes at CHPP in the arctic zone of the Russian Federation: Utility in eco-geopolymer technology;Yatsenko;Glas. Ceram.,2022
4. Fly ash: Production and utilization in India-An overview;Yousuf;J. Mater. Environ. Sci.,2020
5. Addition of additives of ash and slag waste to the properties of sulfoaluminate Portland cement;Thang;Vestn. MGSU,2019
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献