| 摘要: |
| 采用干湿交替方式研究了粉煤灰混凝土的氯离子结合性能，得到了混凝土中自由氯离子含量和总氯离子含量的分布，探讨了粉煤灰对氯离子结合性能的影响，分析了氯离子结合性能随深度的变化规律.结果表明：粉煤灰的掺入提高了混凝土中的结合氯离子含量，但粉煤灰混凝土的氯离子结合率和相对氯离子结合系数均低于未掺粉煤灰混凝土，且两者均随着粉煤灰掺量的增加呈降低趋势；混凝土中结合氯离子含量随深度的增加呈先降低再升高的趋势；氯离子结合能力随深度的增加呈上升趋势并逐渐趋于平稳. |
| 关键词: 氯离子结合性能 自由氯离子 总氯离子 粉煤灰混凝土 扩散深度 |
| DOI：103969/j.issn1007 9629201601006 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51108442，51278260）；中国博士后基金资助项目(2012M521380)；山东省博士后创新基金资助项目（201203106） |
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| Chloride Binding Capacity of Fly Ash Concrete |
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SUN Congtao1, SONG Hua2, NIU Ditao3, ZHANG Peng2, HOU Baorong1
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1.Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China;2.School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China;3.School of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, China
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| Abstract: |
| The chloride binding capacity of fly ash concrete was studied by wet dry alternation method, then the distributions of free chloride content and total chloride content in concrete were obtained. The effect of fly ash on chloride binding capacity was discussed, and the change rule of chloride binding capacity with depth was analyzed. The results show that content of binding chloride in concrete increases due to the addition of fly ash. But chloride binding rate and relative chloride binding coefficient of fly ash concrete are less than the ones of ordinary concrete, and tend to decrease with the increase of fly ash content. With the increase of depth, the content of binding chloride first decreases and then increases, and the chloride binding capacity increases and then basically keeps stable. |
| Key words: chloride binding capacity free chloride total chloride fly ash concrete diffusion depth |
