煤矸石基混凝土力学性能与耐久性研究现状
Research Status on Mechanical Properties and Durability of Coal Gangue-Based Concrete
DOI: 10.12677/hjce.2024.1312245, PDF,   
作者: 吴晗晗：华北水利水电大学土木与交通学院，河南 郑州
关键词: 煤矸石骨料；混凝土；流动性；力学性能；耐久性；体积稳定性；Coal Gangue Aggregate； Concrete； Fluidity； Mechanical Properties； Durability； Volume Stability
摘要: 煤矸石作为煤炭采选过程中产生的固体废弃物，堆积量庞大，严重威胁地表环境和地下水生态系统。将煤矸石作为骨料制备混凝土，是实现大规模固废消耗的有效路径，不仅可以减轻矸石堆积对环境的污染，而且可以弥补天然砂石用料短缺的问题。煤矸石物理化学特性具有地区差异性的特点，若盲目地以煤矸石作为骨料制备混凝土，不利于其性能调控。文章系统分析了煤矸石的矿物组成及理化特性，归纳总结了煤矸石骨料掺量、骨料粒径、水灰比、掺入纤维等因素对煤矸石基骨料混凝土工作性能、力学性能、体积稳定性及耐久性的影响，指出了煤矸石作为骨料存在的问题，并阐述了提升煤矸石骨料性能的技术途径，以期为煤矸石作为骨料在混凝土中的大规模利用提供理论和技术支持。
Abstract: Coal gangue, a solid waste produced during coal mining and processing, accumulates in huge quantities, posing a serious threat to surface environments and groundwater ecosystems. Utilizing coal gangue as aggregate for concrete production represents an effective means of consuming large-scale solid waste. This not only mitigates environmental pollution caused by gangue accumulation but also addresses the shortage of natural sand and gravel materials. The physicochemical properties of coal gangue exhibit regional variability. Blindly using coal gangue as aggregate for concrete preparation is detrimental to its performance regulation. This paper systematically analyzes the mineral composition and physicochemical properties of coal gangue and summarizes the impact of factors such as coal gangue aggregate content, aggregate particle size, water-cement ratio, and fiber addition on the workability, mechanical properties, volumetric stability, and durability of coal gangue-based aggregate concrete. It identifies the problems associated with using coal gangue as aggregate and elaborates on technical approaches to enhance the performance of coal gangue aggregate. The aim is to provide theoretical and technical support for the large-scale utilization of coal gangue as aggregate in concrete.
文章引用：吴晗晗. 煤矸石基混凝土力学性能与耐久性研究现状[J]. 土木工程, 2024, 13(12): 2226-2239. https://doi.org/10.12677/hjce.2024.1312245

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