Research Progress on Coral Aggregate Concrete: From Aggregate Material Properties and Structural Characteristics to Concrete Performance Enhancement

Le résumé fourni par la source

In offshore island-reef engineering, coral aggregate concrete (CAC) has become an important construction material because it enables the use of locally available resources and mitigates the limitations associated with long-distance material transportation. However, compared with ordinary aggregates, coral aggregates exhibit pronounced differences in their material properties and structural characteristics. The material properties of coral aggregates, including physical, mechanical, and chemical properties, are characterized mainly by high water absorption, low strength, and relatively high salt content. Their structural characteristics, including morphological and pore structure characteristics, are characterized mainly by irregular shapes, pronounced angularity, and rough surface textures, as well as high porosity and high pore connectivity. These structural characteristics serve as the key link between the material properties of coral aggregates and CAC performance. Therefore, this review systematically summarizes structural characterization methods for coral aggregates and elucidates the mechanisms through which aggregate material properties and structural characteristics influence CAC performance. On this basis, the main performance enhancement pathways of CAC are synthesized from the perspectives of material design and the service stage. This review provides theoretical support for the material design and engineering applications of CAC.

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