Powęzka Aleksandra, Szulej Jacek, Ogrodnik Paweł
Faculty of Security Engineering and Civil Protection, Main School of Fire Service, 01-629 Warsaw, Poland.
Faculty of Civil Engineering and Architecture, Lublin University of Technology, 20-618 Lublin, Poland.
Materials (Basel). 2020 Oct 5;13(19):4434. doi: 10.3390/ma13194434.
The article describes the possibility of using waste glass cullet as an alternative aggregate for the production of cement composites. Three concrete mixes based on Portland cement CEM I 42.5 R with different contents of recyclate were designed. Borosilicate glass cullet was introduced into the batch by reducing the content of natural aggregate by 0%, 2.5% and 7.5%. Apparent density, water absorption and compressive strength at elevated temperature were measured. The temperature distribution, in cubic samples, was followed by thermocouples. The elements were heated in a special furnace at the temperatures of 200 °C, 400 °C, 600 °C and 800 °C. The composite topography and phase composition were observed using X-ray energy scattering electron microscopy. The results show that the appropriate modification of the cement composite with 2.5% heat-resistant glass cullet improves both the thermal and mechanical properties. Compressive strength reaches an average value of 48.6 MPa after 28 days. The increase in temperature weakens the structure of the composite. It was found that the obtained cement composite has good physico-chemical properties. The research results are presented in the article.
本文描述了使用废玻璃碎粒作为生产水泥复合材料的替代骨料的可能性。设计了三种基于波特兰水泥CEM I 42.5 R且含有不同再生料含量的混凝土混合物。通过将天然骨料含量分别降低0%、2.5%和7.5%的方式，将硼硅酸盐玻璃碎粒引入批次中。测量了表观密度、吸水率和高温下的抗压强度。立方样品中的温度分布由热电偶跟踪。这些样品在一个特殊的炉中于200℃、400℃、600℃和800℃的温度下加热。使用X射线能量散射电子显微镜观察复合材料的形貌和相组成。结果表明，用2.5%的耐热玻璃碎粒对水泥复合材料进行适当改性可同时改善其热性能和力学性能。28天后抗压强度达到平均值48.6MPa。温度升高会削弱复合材料的结构。发现所获得的水泥复合材料具有良好的物理化学性质。文章中展示了研究结果。
