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基于固相分形模型和格子Boltzmann方法,通过数值模拟手段研究非饱和硬化水泥浆的氯离子扩散性能.首先应用固相分形模型来模拟硬化水泥浆的多孔结构,在此基础上采用格子Boltzmann方法模拟相应的氯离子扩散.在固相分形模型中,按照孔隙尺寸分布对硬化水泥浆多孔结构进行逐级饱和来实现饱和度的变化.对比当前数值模拟的结果与经典幂函数型饱和函数的预测结果,发现二者吻合较好,饱和系数的合理取值为4~5.
Based on the solid-phase fractal model and the lattice Boltzmann method, the chloride diffusion properties of unsaturated hardened grouts were studied by means of numerical simulation.Firstly, the solid-phase fractal model was used to simulate the porous structure of hardened grout. On this basis, the lattice Boltzmann method The corresponding chloride ion diffusion.In the solid phase fractal model, according to the pore size distribution of the porous structure of the hardened cement slurry saturation to achieve changes in saturation.Comparing the results of the current numerical simulation with the classical power function type saturation function prediction results , Found that both agree well, a reasonable value of the saturation coefficient of 4 to 5.