| 大坝全级配混凝土抗冻性的试验研究 |
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| 引用本文： | 刘艳霞,陈改新,鲁一晖. 大坝全级配混凝土抗冻性的试验研究[J]. 水力发电学报, 2011, 30(1): 139-143 |
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| 作者姓名： | 刘艳霞 陈改新 鲁一晖 |
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| 作者单位： | 中国水利水电科学研究院结构材料研究所,北京,100038 |
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| 基金项目： | 国家自然科学基金资助项目(50579075); 水利部公益性行业科研专项(200701041) |
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| 摘 要： | 采用相同的水胶比、含气量、高频振捣方法和试件尺寸等,成型全级配和二级配混凝土大试件,进行冻融、强度和超声波波速等试验.试验结果表明,全级配混凝土的抗冻性低于二级配混凝土,经200次冻融循环后,全级配混凝土的不可恢复变形约为二级配混凝土大试件变形的三倍,其强度和超声波波速的下降速率均大于二级配混凝土.全级配混凝土内部高含...
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| 关 键 词： | 水工材料 混凝土抗冻性 大试件试验 全级配混凝土 大坝混凝土 湿筛 |
Research on the frost resistance of dam concrete |
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| LIU Yanxia , CHEN Gaixin , LU Yihui. Research on the frost resistance of dam concrete[J]. Journal of Hydroelectric Engineering, 2011, 30(1): 139-143 |
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| Authors: | LIU Yanxia CHEN Gaixin LU Yihui |
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| Affiliation: | LIU Yanxia,CHEN Gaixin,LU Yihui(China Institute of Water Resources and Hydropower Research,Beijing 100038) |
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| Abstract: | Freeze-thaw tests,mechanical tests,ultra-sonic wave velocity and deformation measurements were conducted on two groups of concrete samples with maximum aggregate sizes of 120mm and 40mm.Each group was molded under the same conditions of water-cement ratio,air content,high-frequency vibration manner and sample size.The test results show that the frost resistance of 120mm sample is poorer than that of 40mm sample.The irrecoverable expansion deformation of 120mm sample after 200 freeze-thaw cycles is about thr... |
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| Keywords: | hydraulic materials concrete frost resistance tests of full-graded samples dam concrete wet sieving |
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