CAJ | 학술논문

在已有的氯离子扩散理论和孔隙分形理论的基础上，提出小孔的孔轴线分形维数表征氯离子扩散的曲折度、大孔的孔表面分形维数修正孔隙率，并推导得到基于孔隙分形修正的氯离子扩散系数模型。通过分析龄期为14 d 和28 d 不同配比混凝土的基于孔隙分形的氯离子扩散系数模型的计算结果和快速氯离子扩散试验（ASTM C1202）电通量，发现两者之间有良好的线性关系。采用基于孔隙分形修正的氯离子扩散系数代入 Fick 第二定律的解析解，对试验后各组混凝土中不同扩散深度的氯离子浓度进行拟合，计算结果与实测值吻合情况较好。
재이유적록리자확산이론화공극분형이론적기출상，제출소공적공축선분형유수표정록리자확산적곡절도、대공적공표면분형유수수정공극솔，병추도득도기우공극분형수정적록리자확산계수모형。통과분석령기위14 d 화28 d 불동배비혼응토적기우공극분형적록리자확산계수모형적계산결과화쾌속록리자확산시험（ASTM C1202）전통량，발현량자지간유량호적선성관계。채용기우공극분형수정적록리자확산계수대입 Fick 제이정률적해석해，대시험후각조혼응토중불동확산심도적록리자농도진행의합，계산결과여실측치문합정황교호。
Based on the theory of chloride diffusion and pore fractal theory a new model is proposed on the base that the sinuosity of chloride diffusion characterized by the axis fractal dimension of the small pore and the porosity of concrete modified by the surface fractal dimension of large pore.The model was applied to analyze 14 d and 28 d age concrete with different proportions and the results,showed a linear relationship with those of he Coulomb electric charge determined by The Rapid Chloride Permeability Test (RCPT)—American Society of Testing and Materials (ASTM)test method C1202.The Chloride diffusion coefficient modified by pore fractal theory was presented in this study.Two different chloride concentrations in different depths of concrete were calculated by modified Chloride diffusion coefficient and orthodox Chloride diffusion coefficient.The comparison between two different Chloride diffusion coefficient indicated that the chloride concentration calculated by modified Chloride diffusion coefficient agreed better with the measured chloride concentration.