Enhancing the properties of coral aggregates through integrated modification techniques: Mechanisms and applications

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-07-22 DOI:10.1016/j.powtec.2025.121422

Qihang Zhang, Junjie Wang, Dongfang Wang, Saifurahman Zaland, Rong Huang, Yilei Wang

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引用次数: 0

Abstract

The transportation of natural aggregates to remote islands incurs substantial logistical costs, driving increased utilization of locally available coral aggregates (CA) in marine construction. However, CA application in coral aggregate concrete (CAC) remains constrained by the material's inherent limitations, including low mechanical strength, high porosity, and elevated salt content. While existing studies predominantly focus on singular modification strategies, understanding the synergistic mechanisms of combined modification techniques remains insufficient. This research systematically examines five modification methods, specifically contrasting individual treatments with composite approaches. Results demonstrate that, the composite technique integrating cement paste coating and corrosion inhibitor (CI) immersion (C-CI) yielded the most pronounced improvements: cylinder compressive strength surged by 91.9 %, and the crushing index decreased by 19.2 % compared to untreated CA. Additionally, the use of this method resulted in a 31.0 % increase in the compressive strength of CAC. These improvements stem from synergistic pore-filling, chloride adsorption, and enhanced bonding at the interfacial transition zone (ITZ) between CA and cement matrix. The research establishes a methodology for optimizing CAC in marine engineering through integrated modification approaches that address CA's intrinsic deficiencies.

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通过综合改性技术提高珊瑚聚集体的性能：机理和应用

将天然聚集体运输到偏远岛屿需要大量的后勤费用，这促使在海洋建设中更多地利用当地可获得的珊瑚聚集体。然而，CA在珊瑚骨料混凝土（CAC）中的应用仍然受到材料固有局限性的制约，包括低机械强度、高孔隙率和高含盐量。虽然现有的研究主要集中在单一的修饰策略上，但对组合修饰技术的协同机制的理解仍然不足。本研究系统地考察了五种改良方法，具体对比了个别治疗与复合治疗的不同。结果表明，水泥浆涂层与缓蚀剂（CI）浸没（C-CI）的复合技术效果最为显著：与未经处理的水泥相比，水泥柱抗压强度提高了91.9%，破碎指数降低了19.2%，水泥柱抗压强度提高了31.0%。这些改进源于CA和水泥基体之间的界面过渡区（ITZ）的协同孔隙填充、氯化物吸附和增强的结合。该研究建立了一种通过综合修改方法来优化船舶工程中CAC的方法，以解决CA的内在缺陷。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.