| 摘要: |
| 采用多重分形理论描述了水泥-石灰石粉浆体絮体生长的分布特征，探讨了浆体絮体生长特征与多重分形谱特征参数的关系.结果表明：随着颗粒总比表面积（SSA）的增加，絮体间的小空隙与大空隙数目增加，絮体分布变分散，小粒径絮体数目减小，大粒径絮体数目稳定，絮体尺寸减小，整体上延缓了絮体生长，而随着SSA的继续增加，絮体生长呈现相反的结果；水泥-石灰石粉浆体絮体生长具有多重分形特征，谱宽、左谱宽和右谱宽可表征絮体生长的空间分布，且谱宽的准确性更高；谱差与左谱值可描述絮体生长的尺寸分布，且谱差的准确性更高. |
| 关键词: 多重分形 絮体生长 谱宽 谱差 最小分维 |
| DOI：10.3969/j.issn.1007-9629.2021.05.001 |
| 分类号:TU528.01 |
| 基金项目:中南大学研究生自主探索创新项目 |
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| Multifractal Characteristics of Floc Growth in Cement-Ground Limestone Pastes |
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XIAO Jia, HAN Kaidong, ZHANG Zedi
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School of Civil Engineering， Central South University， Changsha 410075， China
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| Abstract: |
| The distribution characteristics of floc growth in cement-ground limestone pastes were described by multifractal theory. The relationship between characteristics and multifractal characteristics of floc growth was discussed. The results show that with the increase of the total specific surface area（SSA）， the number of small and large void increases， the distribution of floc becomes dispersed. Besides， the number of pony-size floc decreases， and the number of large size floc is stable， the size of floc decreases gradually. The floc growth is slowed down as a whole， but the opposite result appears with the continuous increase of SSA. The floc growth of pastes has a multifractal property. The spectral width， left spectral width and right spectral width of multifractal spectrum can characterize the spatial distribution， especially the spectral width. The spectral difference and left spectral value can describe the size distribution， especially the spectral difference. |
| Key words: multifractal floc growth spectral width spectral difference minimum dimension |
