塑性混凝土抗压强度关键影响参数的作用机制研究
Research on the Action Mechanisms of Key Influencing Parameters for Compressive Strength of Plastic Concrete

塑性混凝土作为一种柔性工程材料，因其极限变形能力大、抗裂性能好和高抗渗性(渗透系数小)等优点，近些年广泛地应用于筑坝、土石围堰、高层建筑基础防渗、边坡护坡等工程中。本文参考国内外塑性混凝土有关文献，总结了对于塑性混凝土材料强度的影响因素，并分析了影响其强度的内在作用机制原理。在此基础上，基于COMSOL Multiphysics对塑性混凝土进行了冻融循环的数值模拟，为材料优化及防护设计提供多尺度量化依据。得出结论：渗透率与扩散系数随冻融次数的非线性增长，强度随冻融次数增加而弱化。
Plastic concrete, as a flexible engineering material, is characterized by its high ultimate deformation capacity, good crack resistance, and high impermeability has been widely used in dam construction, earth rock cofferdam, high-rise building foundation anti-seepage, slope protection and other engineering projects in recent years. This paper summarizes the influencing factors on the strength of plastic concrete and analyzes the intrinsic action mechanisms by referencing relevant domestic and foreign literatures on plastic concrete. On this basis, numerical simulations of freeze-thaw cycles on plastic concrete are conducted using Comsol Multiphysics, providing a multi-scale quantitative basis for material optimization and protective design. The conclusions show that the permeability and diffusion coefficient exhibit nonlinear growth with the number of freeze-thaw cycles, while the strength degrades gradually as the number of freeze-thaw cycles increases. These findings offer theoretical and technical support for improving the durability design of plastic concrete in cold regions.