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| 矿物掺合料对低水胶比混凝土干缩和自收缩的影响 | |
| 引用本文： | 刘建忠,孙伟,缪昌文,刘加平.矿物掺合料对低水胶比混凝土干缩和自收缩的影响[J].东南大学学报(自然科学版),2009,39(3). |
| 作者姓名： | 刘建忠 孙伟 缪昌文 刘加平 |
| 作者单位： | 1. 东南大学江苏省土木工程材料重点实验室,南京211189;江苏省建筑科学研究院,南京210008 2. 东南大学江苏省土木工程材料重点实验室,南京,211189 3. 江苏省建筑科学研究院,南京,210008 |
| 摘 要： | 研究了粉煤灰(0%、10%、30%、50%)、矿粉(0%、10%、30%、50%)以及硅灰(0%、10%、20%)对水胶比为0.24的低水胶比混凝土干缩和自收缩性能的影响规律,并采用双曲线函数的收缩表达式对试验结果进行拟合,定量化地揭示了矿物掺合料对收缩随时间发展趋势的影响,分析了干缩与自收缩的关系.结果表明:粉煤灰有利于减少低水胶比混凝土的干缩,矿粉次之,硅灰略增大混凝土的干缩;粉煤灰有利于减少低水胶比混凝土的自收缩值,矿粉增大了自收缩,硅灰非常明显地增大混凝土自收缩;低水胶比混凝土的自收缩在所测试的干缩中占有很大的比重,而且随着粉煤灰、矿粉和硅灰掺量的增加所占的比重均逐渐增大. |
| 关 键 词： | 干缩 自收缩 矿物掺合料 超高强混凝土 低水胶比 |
Effect of mineral admixtures on drying and autogenous shrinkage of concrete with low water-to-binder ratio |
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| Liu Jianzhong,Sun Wei,Miao Changwen,Liu Jiaping.Effect of mineral admixtures on drying and autogenous shrinkage of concrete with low water-to-binder ratio[J].Journal of Southeast University(Natural Science Edition),2009,39(3). | |
| Authors: | Liu Jianzhong Sun Wei Miao Changwen Liu Jiaping |
| Institution: | Liu Jianzhong1,2 Sun Wei1 Miao Changwen2 Liu Jiaping2(1Jiangsu Key Laboratory of Civil Engineering Materials,Southeast University,Nanjing 211189,China) (2Jiangsu Research Institute of Building Science,Nanjing 210008,China) |
| Abstract: | The influences of fly ash with replacement percentages of 0%,10%,30% and 50%,ground granulated blast-furnace slag with replacement percentages of 0%,10%,30% and 50% and silica fume with replacement percentages of 0%,10% and 20% on the drying and autogenous shrinkage of mortar in super high strength concrete with water-to-binder ratio of 0.24 were studied.By analyzing the shrinkage curves fitted from the experimental data for the concrete mixtures with different mineral admixtures using hyperbolic expression... |
| Keywords: | drying shrinkage autogenous shrinkage mineral admixture ultra high strength concrete low water to binder ratio |
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