Najm Hadee Mohammed, Nanayakkara Ominda, Ahmad Mahmood, Sabri Sabri Mohanad Muayad
Department of Civil Engineering, Zakir Husain Engineering College, Aligarh Muslim University, Aligarh 202002, India.
Department of Civil Engineering, Xi'an Jiaotong-Liverpool University, Suzhou 215000, China.
Materials (Basel). 2022 Mar 15;15(6):2174. doi: 10.3390/ma15062174.
Construction and demolition (C&D) waste was considered as zero value materials and, as a result, most C&D waste materials ended up in landfills, eventually constituting environmental issues. Therefore, it is important to explore the potential of such C&D waste materials for concrete production. Thus, this research effort aims to find a new method to improve sustainable concrete properties exposed to elevated temperatures at the lowest costs and identify the relationship between temperature change and a change in colour in a heat-exposed concrete structure. Therefore, this study explored the behaviour of three types of concrete: plain concrete (PC), waste ceramic optimal concrete (WOC), and waste ceramic optimal concrete reinforced by hybrid fibre (WOC-Hybrid) in ambient and elevated temperature. The study shows that colour change in a concrete structure exposed to high temperature has a consistent relationship, where it has been found that the colour alteration is of great interest because its appearance usually coincides with the onset of a significant loss of concrete strength as a result of elected temperatures. Overall, it can be considered that waste ceramic materials reinforced by hybrid fibres can be used for concrete production, and by doing so, the negative impact of these wastes on the environment can be controlled as well as fortify the mechanical properties.
建筑与拆除（C&D）废弃物曾被视为无价值材料，因此，大多数建筑与拆除废弃物最终都被填埋，这最终引发了环境问题。所以，探索此类建筑与拆除废弃物用于混凝土生产的潜力十分重要。因此，本研究旨在找到一种以最低成本改善可持续混凝土在高温下性能的新方法，并确定热暴露混凝土结构中温度变化与颜色变化之间的关系。因此，本研究探究了三种类型混凝土在环境温度和高温下的性能：普通混凝土（PC）、废陶瓷优化混凝土（WOC）以及混杂纤维增强废陶瓷优化混凝土（WOC-Hybrid）。研究表明，暴露于高温下的混凝土结构中的颜色变化存在一致的关系，已发现颜色改变很值得关注，因为其外观通常与选定温度导致混凝土强度显著损失的开始阶段相吻合。总体而言，可以认为混杂纤维增强的废陶瓷材料可用于混凝土生产，这样做既能控制这些废弃物对环境的负面影响，又能增强力学性能。
