Krzywoń Rafał, Dawczyński Szymon
Faculty of Civil Engineering, Silesian University of Technology, 44-100 Gliwice, Poland.
Materials (Basel). 2021 Feb 2;14(3):689. doi: 10.3390/ma14030689.
The foaming of geopolymers lowers their density, thus opening up new environmental benefits, including acoustic and thermal insulation. At the same time, foaming disturbs the homogeneity of the material, which worsens the strength parameters, and particularly those related to tension, which can be improved by introducing reinforcement. This paper presents the results of research on foamed geopolymers reinforced with glass fiber meshes, a type of reinforcement that provides an adequate bond. The samples tested here were based on three types of coal fly ash, and were foamed with varying doses of hydrogen peroxide. Samples were cured at 40 °C and were tested after 28 days of maturing at ambient temperature. The strength parameters of the synthesized geopolymers were determined via laboratory testing, and were used to evaluate load-bearing capacity models of the tested samples reinforced with glass fiber mesh. The results showed the importance of the type of ash on the strength properties and efficiency of reinforcement. At the same time, a slight deterioration in the glass fibers was noticed; this was caused by the presence of sodium hydroxide solution, which was used as an activator.
地质聚合物的发泡降低了它们的密度，从而带来了新的环境效益，包括隔音和隔热。同时，发泡会扰乱材料的均匀性，这会使强度参数变差，尤其是与拉伸相关的参数，而通过引入增强材料可以改善这些参数。本文展示了用玻璃纤维网增强的泡沫地质聚合物的研究结果，这种增强材料能提供足够的粘结力。这里测试的样品基于三种类型的粉煤灰，并用不同剂量的过氧化氢进行发泡。样品在40°C下养护，并在室温下熟化28天后进行测试。通过实验室测试确定合成地质聚合物的强度参数，并用于评估用玻璃纤维网增强的测试样品的承载能力模型。结果表明了灰分类型对强度性能和增强效率的重要性。同时，注意到玻璃纤维有轻微劣化；这是由用作活化剂的氢氧化钠溶液的存在导致的。
