Low-carbon concrete of the Pinglu Canal: key challenges and solutions

Abstract

As a key component of the New Western Land-Sea Corridor in China, the high-quality construction of the Pinglu Canal holds considerable significance. Concrete, the most widely used construction material in the project, presents several distinctive engineering characteristics, including large-scale applications over long spans, complex structures for water-saving ship locks, stringent durability requirements, tight construction schedules, and constrained working spaces. These factors not only create technical challenges but also pose a severe, systemic low-carbon challenge due to the huge carbon emission baseline and high carbon intensity associated with concrete construction. This study analyzes the key challenges for concrete engineering in the Pinglu Canal, and proposes a framework for solutions that integrates structural safety with low-carbon synergy across multiple stages and multiple levels. Based on this framework, this study further summarizes the demonstration solutions already implemented in the Pinglu Canal. Drawing from the Pinglu Canal case, this study aims to provide theoretical references and practical guidance for the low-carbon construction of modern canal engineering projects.

Keywords

Pinglu Canal / Low-carbon concrete engineering / Safety-low-carbon synergy / Water-saving ship locks / Mass concrete

References

[1] Liu N. Research and contemplation on key issues in construction of Pinglu Canal Project. Port & Waterway Engineering, 2024, 06: 1-11

[2] Xiao X, Hu Y, Liu J, Xiao J, Fang H, Huo S, Chen L, Guan T, Wang X, Wang Y, Jin M, Wang R, Yan Q, Zhu T, et al.. Fundamental scientific issues of green construction and operation for modern canal engineering. Science and Technology Foresight, 2025, 4(3): 9-22

[3] Billington DP, Jackson DC, Melosi MV. The history of large federal dams: Planning, design and construction, 2005Government Printing Office

[4] Xiao J, Yu C, Xia B, Xie L, An Y, Cheng Y, Xiao X, et al.. Fundamental technical problems and countermeasures in the low-carbon construction of canal engineering. Strategic Study of CAE, 2024, 26: 210-221

[5] Dong X, Lv X, Wang H. Layout plan of Madao Hub. Port & Waterway Engineering, 2025, 08: 8-17

[6] Xiao J, Qiang C, Nanni A, Zhang K. Use of sea-sand and seawater in concrete construction: Current status and future opportunities. Construction and Building Materials, 2017, 155: 1101-1111

[7] Jin M, Hu Z, Zhao H, Wang Y, Liu J, et al.. Research status and prospect of cracking prevention and long service life of massconcrete in modern canal projects. Science and Technology Foresight, 2025, 4(3): 23-28

[8] Niu X. The Three Gorges Project. Engineering, 2022, 15: 17-23

[9] Xia B, Xiao J, Guan X. Target low-carbon conditional probability for low-carbon structural design. Structural Safety, 2025, 117: 102636

[10] Xia B, Xiao J, Ding T, Zhang K. Probabilistic sustainability design of structural concrete components under climate change. Structural Safety, 2021, 92: 102103

[11] Xia B, Ding T, Xiao J. Life cycle assessment of concrete structures with reuse and recycling strategies: A novel framework and case study. Waste Management, 2020, 105: 268-278

[12] Feng Z, Liang Z, Xiao J, Li W, Liu H. Interfacial bond properties of austenitic stainless steel rebars in low-carbon ultra-high performance concrete and normal concrete: An experimental evaluation. Engineering Structures, 2025, 344: 121379

[13] Bai M, Song L, Xiao Q, Sun J, Liu H. Development of low-carbon engineered cementitious composites incorporating lithium slag: Mechanical properties, microstructure evolution, and life cycle assessment. Construction and Building Materials, 2026, 520: 145983

[14] Xiao J, Zou S, Ding T, Duan Z, Liu Q. Fiber-reinforced mortar with 100% recycled fine aggregates: A cleaner perspective on 3D printing. Journal of Cleaner Production, 2021, 319: 128720

[15] Minunno R, O’Grady T, Morrison GM, Gruner RL. Exploring environmental benefits of reuse and recycle practices: A circular economy case study of a modular building, Resources. Conservation and Recycling, 2020, 160: 104855

[16] Liang X, Xiao J, Wang Z, Li W, Zhou Y, Wei Y. The internal strain development of bridge concrete based on wireless monitoring: A comparative study between conventional concrete and recycled aggregate concrete. Construction and Building Materials, 2025, 501: 144168

[17] Tang H, Huang H, Shen L, Yao P, Sun J, et al.. High-efficiency Concrete Pouring Technology for Pinglu Canal Super-large Ship Lock. Construction Technology, 2025, 54: 148-153

[18] Wu F, Huang T, Guo L, Gao X, Wang X, et al.. Design and application of concrete precooling system for Pinglu Canal Qishi Hub Project. China Harbour Engineering, 2025, 45: 98-102

[19] Wang J, He J, Yan Q, Yi C, Yang Y, Wang Y, Mu S, Fan Z, Chen B, Chen Z, et al.. Quality control of mass concrete in ship locks of Pinglu Canal Qingnian Hub. Journal of Guangxi University (Natural Science Edition), 2025, 50: 467-478

[20] Liu R, Tang C. (2026). Control measures and effect analysis of concrete cracks in the middle pier bottom plate at the lower gate head of Qishi Hub. China Harbour Engineering, 46, 90–96+104.

[21] Luo D, Huang J, Shen L, Xiao J, Hu Y, Mo H. New cooling method of constructing multiple internal holes combined with water injection/air ventilation for mass concrete temperature control and its application to canal navigation walls. Journal of Building Engineering, 2025, 111: 113369

[22] Zhai S., Shen L., Xiao J., Deng, Z., Hu, J., & Liu, J. (2026). Research on green and low-carbon construction technology for mass concrete structures of Pinglu Canal Hub Project. Hydro-Science and Engineering, 3, 1–13.

[23] Qu S, She Y, Zhou Q, Verschuur J, Zhao L, Liu H, Xu M, Wei Y. Modeling the dynamic impacts of maritime network blockage on global supply chains. Innovation, 2024, 5(4): 100653

[24] Xiong X, Yang Z, Luo S, Lin J, Dong S. Life cycle assessment and cost analysis of ECC pavement overlay. Bulletin of the Chinese Ceramic Society, 2023, 42(11): 3927-3936

[25] Li, P., Xiao, X., Liu, Z., Bai, F., Xiao, J., Cheng, Y., Yan, Q., & Cao, D. (2025). Current Status and Prospects of Carbon Accounting and Low-carbon Technology for Modern Canals[J]. Science and Technology Foresight, 4(3), 97–107.

Funding

National Natural Science Foundation of China(U25A6019)

Guangxi Science and Technology Program(LT2504240009)

RIGHTS & PERMISSIONS

The Author(s)