Luo Chenchen, Zheng Bo, Li Yi, Yang Qiao
School of Civil Engineering, Wuhan Huaxia University of Technology, Wuhan, China.
School of Civil Architecture and Environment, Hubei University of Technology, Wuhan, China.
PLoS One. 2025 Jan 31;20(1):e0317341. doi: 10.1371/journal.pone.0317341. eCollection 2025.
Based on the reuse of industrial solid wastes such as calcium carbide slag, slag, and oil shale residue, this work utilizes oil shale residue and slag as precursor materials, calcium carbide slag and sodium carbonate as alkaline activator to prepare a geopolymer-based binder. Mix proportion experiments of the geopolymer-based binder with varying oil shale residue contents were designed. Chemical composition and microstructure of the alkaline-activated oil shale residue-slag geopolymer-based binder system were analyzed using X-ray Fluorescence Spectrometer (XRF), X-ray Powder Diffractometer (XRD), and Scanning Electron Microscope (SEM). Meanwhile, the fluidity and mechanical properties of the material were also investigated. The results indicate that as the oil shale residue content increases, the fluidity and 3-day compressive strength and splitting tensile strength of the filling slurry gradually decrease, while the 28-day strength first rises and then falls, reaching a maximum when the oil shale residue content is 20%. When the oil shale residue content is below 20%, the hydration product content gradually increases, and the microstructure tends to be denser. However, as the oil shale residue content further increases, the hydration product gradually decreases, and the microstructure becomes poorer. Therefore, the optimal oil shale residue content is 20%. The geopolymer-based binder system prepared in this paper is a low-carbon, environmentally friendly, and high-performance material system, its research and development are of great significance to the human society.
基于电石渣、矿渣和油页岩渣等工业固体废弃物的再利用，本研究以油页岩渣和矿渣为前驱体材料，电石渣和碳酸钠为碱性激发剂制备了一种地聚合物基胶凝材料。设计了不同油页岩渣含量的地聚合物基胶凝材料的配合比实验。采用X射线荧光光谱仪（XRF）、X射线粉末衍射仪（XRD）和扫描电子显微镜（SEM）分析了碱激发油页岩渣-矿渣地聚合物基胶凝材料体系的化学成分和微观结构。同时，还研究了该材料的流动性和力学性能。结果表明，随着油页岩渣含量的增加，充填浆液的流动性、3天抗压强度和劈裂抗拉强度逐渐降低，而28天强度先升高后降低，当油页岩渣含量为20%时达到最大值。当油页岩渣含量低于20%时，水化产物含量逐渐增加，微观结构趋于致密。然而，随着油页岩渣含量进一步增加，水化产物逐渐减少，微观结构变差。因此，油页岩渣的最佳含量为20%。本文制备的地聚合物基胶凝材料体系是一种低碳、环保、高性能的材料体系，其研发对人类社会具有重要意义。
