| 摘要: |
| 混凝土表面渗透性的研究与评价，均与表面层的次级层量化及其性能表征有关.阐述了混凝土中部分与层有关的参数，提出距表面断距x、距表面单位断距中值z和距表面单位断距层Z这3个主要概念，建立了混凝土中层的划分方法、表征方法及其分布模型与单位横断层性能参数CHS(单位横断层氯离子质量分数)及其分布的表征方法，通过该表征方法分析研究了CHS的试验值，结果表明：影响混凝土渗透性的表层厚度为2.0~3.0mm，Z3=2.5±0.5是一个特殊断层，分层取样断距量级宜为亚毫米级，表面渗透层厚度可仅限于10mm；CHS表观分布模型CHS,b z(x)呈指数函数分布，表面渗透层内表面和外表面处的CHS其基准不同，数值也不同.给出了单位横断层的位置与分布模型和部分与层有关的结构层分布模型，同时标示CHS及其分布的表征方法. |
| 关键词: 混凝土 表面渗透层 距表面断距 氯离子 结构层分布模型 |
| DOI：10.3969/j.issn.1007 9629.2013.03.008 |
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| 基金项目: |
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| Division of Layers in Concrete and Characterization Methods for Distributionof Chloride Concentration and Its Application |
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HUANG Zhi shan, WEI Hui hui
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School of Civil Engineering, Harbin Institute of Technology, Harbin 150006, China
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| Abstract: |
| Study and evaluation of permeability of concrete surface are related to quantization of the secondary area of the concrete surface layer and its performance characterization. Some parameters relating to concrete layers are studied. Three main concepts including the fault displacement from the inner surface x, the median of fault displacement from the inner surface z, and the unit fault layer from surface Z is proposed. Then the division method, characterization method and distribution model of unit cross section layer S as well as the performance parameter and the distribution characterization method of the unit cross section layer are established. The research purpose and significance of permeable surface layer based on chloride ion are clarified. The test result of chloride ion mass fraction in unit cross sectional layer is analyzed with the characterization methods of S and its CHS. It is known that the surface layer thickness affecting the permeability of concrete is 2.03.0 mm. Z3 =2.5±0.5 is a special fault. The fault magnitude of stratified sampling is sub millimeter level. The thickness of permeable surface layer is limited to 10 mm. The apparent distribution model of CHS is an exponential function CHS,b z(x). The benchmark of CHS at the inner surface of permeable layer surface is different from that at outer surface. The distribution model of the position and distribution of fault as well as the structure layer partly relating to the layers are proposed. At the same time the characterization method for CHS and its distribution are put forward. |
| Key words: concrete permeable surface layer fault displacement from the inner surface chloride ion distribution model of structural level |
