CAJ | 학술논문

以冻干法制作的粉煤灰不扰动试样为对象，研究粉煤灰的孔隙结构，利用显微数码成像技术、专业图像处理技术，结合分形理论得到了粉煤灰孔隙半径分布分维数，并分析了粉煤灰孔隙结构具有多重分形的原因。利用毛细管束模型和 Poiseuille 方程推导了粉煤灰的渗透率与孔隙半径分布分维数之间的定量化函数式。由参数分析可知粉煤灰的渗透率随最大孔隙半径及拐点孔隙半径的增大而增大、并且随区间Ⅰ和区间Ⅱ的孔隙半径分布分维数的增大而减小。
이동간법제작적분매회불우동시양위대상，연구분매회적공극결구，이용현미수마성상기술、전업도상처리기술，결합분형이론득도료분매회공극반경분포분유수，병분석료분매회공극결구구유다중분형적원인。이용모세관속모형화 Poiseuille 방정추도료분매회적삼투솔여공극반경분포분유수지간적정양화함수식。유삼수분석가지분매회적삼투솔수최대공극반경급괴점공극반경적증대이증대、병차수구간Ⅰ화구간Ⅱ적공극반경분포분유수적증대이감소。
This paper investigated the pore structure of fly ash with the obj ect of undisturbed fly ash samples prepared by freeze drying.By incorporating microscopic digital imaging technology and profession-al image processing technology,the porosity density dimension of fly ash was derived on the basis of the fractal theory,and the cause of the multi-fractal property of pore structures of fly ash was analyzed.A function quantifying the relation between the permeability and the porosity density dimension of the fly ash was derived by employing capillary bundle model and Poiseuille equation.Parametric analysis indicates that the permeability of fly ash increases with the increase of the maximum pore radius and the inflection point of pore radius,and decreases with the increase of the fractal dimension of the pore radius distribution in sections I and Ⅱ.