Górski Marcin, Wielgus Natalia, Loska Krzysztof, Kozioł Michał, Landrat Marcin, Ścierski Waldemar, Pikoń Krzysztof
Department of Structural Engineering, Faculty of Civil Engineering, The Silesian University of Technology, Akademicka 5, 44-100 Gliwice, Poland.
Department of Water and Wastewater Engineering, Faculty of Energy and Environmental Engineering, The Silesian University of Technology, Akademicka 2, 44-100 Gliwice, Poland.
Polymers (Basel). 2021 Apr 3;13(7):1149. doi: 10.3390/polym13071149.
Geopolymers can be treated as an environmentally friendly alternative for concrete and enables utilization of various wastes. This paper focuses on the possibility of application of discarded cathode ray tube (CRT) glass inside a metakaolin-based geopolymer in the form of an aggregate, providing an ecological method of recycling of this hazardous material. The main goal of this paper was to develop an optimal composition of a new geopolymer and to describe its behavior under varying curing conditions. A geopolymer made of different mixtures was subjected to flexural and compressive strength tests. The density, mass loss, temperature changes, and metals leaching were determined as well. The results demonstrated that neither the content of CRT glass nor the curing regime has a significant influence on the mechanical behavior. However, the strength of the geopolymer containing 50% CRT glass by mass increased with time in contrast to a geopolymer with a higher CRT glass content. The development of temperature inside the mixture was dependent on the amount of metakaolin. The concentration of toxic metals in an aqueous extract decreased considerably after the encapsulation of CRT glass inside the geopolymer. The presented results indicate that discarded CRT glass can be considered an aggregate for a metakaolin-based geopolymer. The new material shows high strength and makes the CRT glass safe for the environment.
地质聚合物可被视为混凝土的一种环保替代品，并能利用各种废弃物。本文重点研究了废弃阴极射线管（CRT）玻璃以骨料形式应用于偏高岭土基地质聚合物中的可能性，提供了一种回收这种有害物质的生态方法。本文的主要目标是开发一种新型地质聚合物的最佳组成，并描述其在不同养护条件下的性能。对由不同混合物制成的地质聚合物进行了抗弯和抗压强度测试。还测定了密度、质量损失、温度变化和金属浸出情况。结果表明，CRT玻璃的含量和养护制度对力学性能均无显著影响。然而，与CRT玻璃含量较高的地质聚合物相比，含50%（质量）CRT玻璃的地质聚合物强度随时间增加。混合物内部的温度变化取决于偏高岭土的用量。将CRT玻璃封装在地质聚合物中后，水提取物中有毒金属的浓度大幅降低。给出的结果表明，废弃CRT玻璃可被视为偏高岭土基地质聚合物的骨料。这种新材料具有高强度，且使CRT玻璃对环境安全。
