A Literature Review on the Substitution of Coal Gangue for Fine Aggregates to Produce High-performance Concrete

Abstract

Using coal gangue as a substitute for fine aggregate to prepare high-performance concrete integrates environmental protection and economic value. However, there are currently issues such as unstable performance, insufficient long-term durability research, and the need to optimize cost-effectiveness. Future research will focus on breakthroughs in multiple areas: establishing a comprehensive database of coal gangue characteristics, quantifying the relationship between its composition and concrete performance, and accurately designing mix proportions; developing an intelligent quality control system based on artificial intelligence and big data to ensure stable product quality; constructing a long-term durability testing platform to simulate complex service environments, combining numerical simulations to understand performance evolution laws and service life; establishing a lifecycle cost-effectiveness assessment model to reduce costs through technological innovation and policy optimization; integrating frontier technologies to explore new composite modification and collaborative enhancement techniques to improve performance and promote green development; advancing standardized construction and collaboration between industry, academia, and research to facilitate industrial applications. These research directions will provide key support for the large-scale application and sustainable development of coal gangue concrete in the construction industry.