Researchers Unveil Insights on Frost Heaving in Prestressed Concrete

Research conducted by a team from Xi’an University of Architecture and Technology and Beijing YJK Building Software Co., Ltd. has shed light on the critical issue of frost heaving and mechanical deterioration in prestressed concrete (PC) structures. As the use of PC components becomes increasingly common in cold regions, the impact of freeze-thaw (FT) cycles on their durability and safety is garnering attention.

The study, titled “Frost Heaving Behavior and Mechanical Deterioration of Prestressed Concrete,” explores how freeze-thaw cycles can lead to significant structural challenges. Researchers, including Xiguang LIU, Huimin ZHANG, Yao LV, Ditao NIU, and Jingxi PENG, designed and fabricated eight bonded post-tensioned PC components subjected to varying stress levels and FT cycles. The stress levels tested were 0.1, 0.2, 0.3, and 0.4, with the components exposed to 0, 50, 100, 150, 200, 250, and 300 freeze-thaw cycles.

The investigation focused on measuring strain variations along the length of the components during FT cycles. Results indicated a direct correlation between the number of FT cycles and an increase in concrete frost heaving strain, residual strain, and prestressing tendon strain loss. Notably, at lower stress levels, prestressing helped mitigate frost cracking in concrete. However, as stress levels increased, this effect diminished, leading to more pronounced cracking.

In addition to the experimental findings, the researchers developed a strain loss model for the components. This model aligns closely with the experimental data, offering valuable theoretical and practical insights for the design and maintenance of prestressed concrete structures in icy conditions.

The full text of the study, published in 2025, is available for those interested in exploring the detailed findings and methodologies used. This research serves as a vital resource for engineers and architects working in cold climates, emphasizing the need for robust design strategies to combat the challenges posed by freeze-thaw cycles.

Understanding the frost heaving behavior and mechanical deterioration of prestressed concrete is essential for ensuring the longevity and safety of structures in harsh environments. This study marks a significant step in addressing these concerns, providing a foundation for future research and practical applications in the field of civil engineering.