C auses of C racks in L arge- S cale C oncrete P rojects and P reventive M easures

Large-scale concrete is widely used in large dams, super high-rise buildings, large-span bridges, and other projects, among which cracks have become the most prominent quality problem in construction and later use. Nowadays, there have been relatively complete research results on the prevention and control of concrete cracks, but a complete system has not yet been formed. This article systematically sorts out the main categories of cracks in large-volume concrete engineering and explains the reasons for their formation from four dimensions: raw materials and mix proportions, structural design, construction management, and later maintenance. The core causes of cracks are the temperature difference between the inside and outside due to hydration heat, stress concentration, non-standard construction operations, and lack of maintenance control. This article summarizes the severe engineering challenges caused by cracks, such as leakage, steel corrosion, and deterioration of structural durability, from four dimensions of prevention and control measures. Integrating existing engineering experience and research results, it aims to construct a complete and replicable prevention and control system for the entire process of large-volume concrete cracking, aiming to provide practical guidance for similar projects to reduce crack incidence and extend structural service life.