| 摘要: |
| 为了更好地确定混凝土孔隙的面分形维数，完善混凝土孔隙分形的相关研究，采用液态硫磺浸渍样品，利用反光显微镜采集图片，并结合图像分析软件分析图片和处理数据，以获得不同龄期和不同掺和料下混凝土孔隙的面分形维数，并对面分形维数变化与强度变化之间的关系进行了探讨.结果表明：混凝土孔隙的面分形维数会随着龄期的变化而变化，不同掺量的掺和料会对面分形维数产生不同影响，但相同掺量、不同掺和料的面分形维数却变化不大；面分形维数与强度呈反比，两者具有一定相关性，且相关系数一般在0.90以上，掺和料的活性与掺量会对上述相关性产生不同影响. |
| 关键词: 混凝土 孔隙 面分形 测试方法 |
| DOI：10.3969/j.issn.1007 9629.2012.03.004 |
| 分类号: |
| 基金项目:“十一五”国家科技支撑计划项目（2009BAB49B03） |
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| Research of Pore Area Fractal Characteristic of Concrete and Its Test Method |
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ZHANG Wen sheng1, ZHANG Jian bo1, LI Jian yong2, WANG Hong xia1, YE Jia yuan1, WU Chun li1
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1.State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China;2.Institute of Concrete Technology, Beijing Xinao Concrete Group Company Limited, Beijing 100076, China
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| Abstract: |
| In order to ascertain the pore area fractal dimension and improve its research a new method was used. Pictures of pores were taken by using reflected light microscopy and impregnating samples with liquid sulfur. Then the area fractal dimension with different age and different admixtures was calculated by image processing software, the relationship between pore fractal dimension and strength was also studied. The result shows that the area fractal dimension changes with time, different content affects the area fractal dimension much but different admixtures with the same content influence it little; the area fractal dimension has certain correlation with strength and it is inversely proportional to each other, the correlation coefficient between them is above 0.90, the content and reactivity of admixtures affect the correlation much. |
| Key words: concrete pore area fractal test method |
