New Study Reveals Impact of Freeze-Thaw Cycles on Prestressed Concrete

Research conducted by a team from Xi’an University of Architecture and Technology and Beijing YJK Building Software Co., Ltd. has revealed significant insights into the effects of freeze-thaw (FT) cycles on prestressed concrete (PC) structures. As these materials are increasingly utilized in cold regions, understanding their vulnerability to freeze-thaw damage is critical for ensuring safety and longevity.

The study, titled “Frost Heaving Behavior and Mechanical Deterioration of Prestressed Concrete,” was led by Xiguang Liu alongside researchers Huimin Zhang, Yao Lv, Ditao Niu, and Jingxi Peng. It specifically investigates the frost heaving behavior and mechanical deterioration of bonded post-tensioned PC components subjected to various FT conditions.

Eight bonded post-tensioned PC components were designed and manufactured with stress levels of 0.1, 0.2, 0.3, and 0.4. These components underwent a series of experiments, experiencing between 0 and 300 FT cycles. The research focused on measuring strain variations along the length of the components throughout the cycles, providing valuable data on how FT conditions affect concrete performance.

The findings indicate that as the number of freeze-thaw cycles increases, both the concrete frost heaving strain and the residual strain escalate, leading to a notable loss of prestressing tendon strain. At lower stress levels, the prestress tends to inhibit cracking in the concrete. However, when stress levels exceed a certain threshold, the risk of frost damage intensifies, posing a significant threat to structural integrity.

Implications for Design and Maintenance

To better understand these interactions, the research team developed a strain loss model that correlates well with the experimental results. This model can serve as a critical tool for engineers and architects involved in the design and maintenance of PC structures in cold climates.

The study highlights the necessity for ongoing research and development of strategies to mitigate freeze-thaw damage. As the demand for durable infrastructure increases, findings like these will inform best practices and contribute to safer building techniques in regions susceptible to harsh weather conditions.

The full text of the paper is available at: https://doi.org/10.1007/s11709-025-1188-1.