Łach Michał, Kozub Barbara, Bednarz Sebastian, Bąk Agnieszka, Melnychuk Mykola, Masłoń Adam
Faculty of Material Engineering and Physics, Chair of Material Engineering and Physics, Cracow University of Technology, Jana Pawła II 37, 31-864 Cracow, Poland.
Department of Materials Science, Lutsk National Technical University, Lvivska 75, 43000 Lutsk, Ukraine.
Materials (Basel). 2024 May 14;17(10):2336. doi: 10.3390/ma17102336.
Geopolymers are binder materials that are produced by a chemical reaction between silica or aluminum compounds with an alkaline activating solution. Foamed geopolymer materials are increasingly being cited as a viable alternative to popular organic insulation materials. Since the foaming process of geopolymers is difficult to control, and any achievements in improving the performance of such materials are extremely beneficial, this paper presents the effect of the addition of basalt powder on the properties of foamed geopolymers. This paper presents the results of physicochemical studies of fly ash and basalt, as well as mechanical properties, thermal properties, and structure analysis of the finished foams. The scope of the tests included density tests, compressive strength tests, tests of the thermal conductivity coefficient using a plating apparatus, as well as microstructure tests through observations using light and scanning microscopy. Ground basalt was introduced in amounts ranging from 0 to 20% by mass. It was observed that the addition of basalt powder contributes to a reduction in and spheroidization of pores, which directly affect the density and pore morphology of the materials tested. The highest density of 357.3 kg/m was characterized by samples with a 5 wt.% basalt powder addition. Their density was 14% higher than the reference sample without basalt powder addition. Samples with 20 wt.% basalt addition had the lowest density, and the density averaged 307.4 kg/m. Additionally, for the sample containing 5 wt.% basalt powder, the compressive strength exceeded 1.4 MPa, and the thermal conductivity coefficient was 0.1108 W/m × K. The effect of basalt powder in geopolymer foams can vary depending on many factors, such as its chemical composition, grain size, content, and physical properties. The addition of basalt above 10% causes a decrease in the significant properties of the geopolymer.
地质聚合物是通过硅化合物或铝化合物与碱性活化溶液之间的化学反应生成的粘结材料。泡沫地质聚合物材料越来越多地被认为是流行有机保温材料的可行替代品。由于地质聚合物的发泡过程难以控制，而在改善此类材料性能方面取得的任何成果都极为有益，因此本文介绍了添加玄武岩粉对泡沫地质聚合物性能的影响。本文介绍了粉煤灰和玄武岩的物理化学研究结果，以及成品泡沫的力学性能、热性能和结构分析。测试范围包括密度测试、抗压强度测试、使用镀覆装置测试导热系数，以及通过光学显微镜和扫描显微镜观察进行微观结构测试。引入的磨碎玄武岩质量分数范围为0%至20%。观察到，添加玄武岩粉有助于减少孔隙并使孔隙球化，这直接影响所测试材料的密度和孔隙形态。添加5 wt.%玄武岩粉的样品密度最高，为357.3 kg/m³。其密度比未添加玄武岩粉的参考样品高14%。添加20 wt.%玄武岩的样品密度最低，平均密度为307.4 kg/m³。此外，对于含有5 wt.%玄武岩粉的样品，抗压强度超过1.4 MPa，导热系数为0.1108 W/m·K。玄武岩粉在地质聚合物泡沫中的作用可能因许多因素而异，例如其化学成分、粒度、含量和物理性能。添加超过10%的玄武岩会导致地质聚合物的显著性能下降。
