Damage mechanism of airport pavement concrete undergoing freeze-thaw: The coupling effects of low-concentration deicers and carbonation

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub Date : 2025-02-15 DOI:10.1016/j.conbuildmat.2025.140365

Jun Yang , Zhao Zheng , Xinpeng Ye , Jiahui Guo , Yongxin Fu , Kang Wang , Qian Liu , Bo Wu , Xue Ma , Hao Deng , Yuxiang Li

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引用次数: 0

Abstract

In order to investigate the changes in pore structure, C-S-H gel structure, and its products in carbonated and non-carbonated airport pavement concrete under freeze-thaw cycles induced by airport deicers, this study examined the single-sided freeze-thaw damage of concrete exposed to five different airport deicers with a mass concentration of 3 %: potassium formate (PF), commercial potassium formate (PF-C), potassium acetate (PA), commercial potassium acetate (PA-C), and calcium magnesium acetate (CMA).Quantitative characterization techniques such as XPS NMR, and MIP were employed to evaluate the relevant parameters. The results show that carbonation improves the freeze-thaw resistance of concrete by reducing the porosity of the concrete surface layer, enhancing the polymerization degree of C-S-H gel, and increasing the Ca/Si ratio. During the freeze-thaw cycles, when carbonated or non-carbonated concrete was exposed to PF and PF-C, the harmful pores in the surface debris increased significantly, and spalling was more likely to occur in the cement paste layer with a low Ca/Si ratio, ultimately leading to more severe freeze-thaw damage. In contrast, CMA had the least impact on freeze-thaw damage. These findings provide practical insights for selecting suitable deicers and optimizing carbonation treatment to improve the durability of airport pavement concrete in cold climates.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.