Surface fractal dimension: An indicator to characterize the microstructure of cement-based porous materials
Surface fractal dimension: An indicator to characterize the microstructure of cement-based porous materials
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DOI：
10.1016/j.apsusc.2013.05.123
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发表时间：
2013-10
影响因子：
6.7
通讯作者：
Q. Zeng;Mingyong Luo;X. Pang;Le Li;Kefei Li
中科院分区：
文献类型：
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作者：
Q. Zeng;Mingyong Luo;X. Pang;Le Li;Kefei Li
研究了掺矿渣水泥浆体和砂浆的孔结构表面分形维数。对样品进行水固化和密封固化。根据压汞法（MIP）数据，采用Zhang的分形维数模型（Ind Eng Chem Res，34（1995）：1383-1386）确定了样品的分形维数。结果证实了孔隙结构分形维数的尺度依赖性，并确定了所有样品的微观分形，过渡和宏观分形区域。微观分形区域的上孔径范围为约30 nm，过渡区域覆盖孔径的0.5-2个数量级，宏观分形区域覆盖1.5-3个数量级。固化条件和粘结剂中的矿渣对孔结构的分形特性都有影响，掺入矿渣的试样具有较大的微观分形区域。
This study investigates the surface fractal dimensions (SFDs) of pore structure of cement pastes and mortars with/without ground granulated blast-furnace slag (GGBS) incorporated into binder. The samples were subject to water curing and sealed curing. The fractal dimensions of samples are determined by Zhang’s model (Ind Eng Chem Res, 34 (1995):1383–1386) on the basis of mercury intrusion porosimetry (MIP) data. The results confirm the scale-dependent property of fractal dimension of pore structures and the micro-fractal, transition and macro-fractal regions are identified for all samples. The upper pore size range for micro-fractal regions is around 30 nm, the transition regions cover 0.5–2 magnitude orders of pore size and macro fractal regions cover 1.5–3 magnitude orders. Both curing conditions and GGBS in binder have impact on the fractal properties of pore structure, and samples incorporating GGBS have substantially larger values for micro-fractal regions.