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| 关于抗冻混凝土的含气量及气泡间距临界值的探讨 | |
| 引用本文： | 朱志远,王世智,阎勇刚,岑国平,刘庆涛.关于抗冻混凝土的含气量及气泡间距临界值的探讨[J].四川建筑科学研究,2011,37(5):222-224. |
| 作者姓名： | 朱志远 王世智 阎勇刚 岑国平 刘庆涛 |
| 作者单位： | 1. 兰州军区空军后勤部,甘肃兰州730020;空军工程大学工程学院,陕西西安710038 2. 兰州军区空军后勤部,甘肃兰州,730020 3. 空军工程大学工程学院,陕西西安,710038 |
| 摘 要： | 通过研究对水灰比、含气量对混凝土气泡结构和抗冻性的影响,FHWA质疑了ACI关于保证混凝土抗冻耐久性的含气量与气泡间距的临界值。研究结果表明,在水灰比为0.4～0.5、含气量为2.5%～4.5%范围内,含气量为3.5%和4.5%的混凝土的抗冻性能相似,耐久性系数都在80%以上。水灰比对混凝土抗冻性的影响很小,没有发现水灰比与引气混凝土抗冻性之间存在明显的联系。对混凝土抗冻耐久性具有决定性的影响是气泡间距系数,随着气泡间距的减小,混凝土的抗冻性能在提高。 |
| 关 键 词： | 道面混凝土 抗冻性 含气量 气泡结构 |
Discussion on critical air content and air-void spacing for frost resistance of concrete |
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| ZHU Zhiyuan,WANG Shizhi,YAN Yonggang,CEN Guoping,LIU Qingtao.Discussion on critical air content and air-void spacing for frost resistance of concrete[J].Building Science Research of Sichuan,2011,37(5):222-224. | |
| Authors: | ZHU Zhiyuan WANG Shizhi YAN Yonggang CEN Guoping LIU Qingtao |
| Affiliation: | ZHU Zhiyuan1,2,WANG Shizhi1,YAN Yonggang1,CEN Guoping2,LIU Qingtao2(1.Air Force Logistics Department of Lanzhou Military Area Command,Lanzhou 730020,China,2.Air Force Engineering University Engineering College,Xi'an 710038,China) |
| Abstract: | The influence of water-cement(W/C) ratio and air content on the freeze-thaw resistance and microstructure was investigated,FHWA thought the critical value of freeze-thaw resistance durability was too rigorous that is constituted by ACI.The experiment was designed for concretes with fresh air contents ranging from 2.5 to 4.5 percent and W/C ratio ranging from 0.4 to 0.5,it can be indicated that the mixes with fresh air content in the levels of 3.5 percent and 4.5 percent present similar freeze-thaw resistanc... |
| Keywords: | pavement concrete freeze-thaw resistance air content air-void structure |
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