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研究了泡沫混凝土孔结构的分形特征,并利用盒维数法计算泡沫混凝土微观结构图片的分形维数,分析不同孔结构的泡沫混凝土分形维数的变化规律。通过抗压强度试验,研究了分形维数与抗压强度的关系,建立了分形维数与密度的回归方程,对理论值与实测值进行对比。结果表明:泡沫混凝土的孔结构具有分形特征;随着分形维数增大,泡沫混凝土的28d抗压强度和密度逐渐减小;28d抗压强度和密度的计算值与实测值较为接近。
Fractal characteristics of foam concrete pore structure were studied. Fractal dimension of foam concrete microstructure was calculated by box dimension method. Fractal dimension of foam concrete with different pore structure was analyzed. Through the compressive strength test, the relationship between fractal dimension and compressive strength was studied. The regression equation between fractal dimension and density was established, and the theoretical value and the measured value were compared. The results show that the pore structure of the foam concrete has fractal characteristics. With the increase of the fractal dimension, the compressive strength and density of the foam concrete decrease gradually at 28 days. The compressive strength and density of the foam concrete at 28 days are close to the measured values.