| 掺氧化镁的RCC特性试验研究及在马堵山大坝高温施工中的温控仿真 |
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| 引用本文： | 谢祥明.掺氧化镁的RCC特性试验研究及在马堵山大坝高温施工中的温控仿真[J].西安建筑科技大学学报(自然科学版),2011,43(1):137-142. |
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| 作者姓名： | 谢祥明 |
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| 作者单位： | 河海大学水利水电工程学院,江苏,南京,210098 |
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| 基金项目： | 国家自然科学基金资助项目(50579080) |
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| 摘 要： | 掺MgO的RCC混凝土主要运用提高混凝土的防裂特性.通过外掺氧化镁碾压混凝土的特性试验研究,通过弹性模量与自生体积变形的试验,确定本文中碾压混凝土中恰当的MgO掺量为5.5%,并对马堵山大坝碾压混凝土的最大浇筑块的高温环境施工进行精确的温度场和应力场仿真计算,结果表明采用外掺氧化镁技术与埋设HDPE冷却水管相结合的措施对RCC高温施工的防裂是行之有效的温控防裂方法,为随后进行的马堵山碾压混凝土大坝高温环境的施工方案提供了重要的科学依据.
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| 关 键 词： | 氧化镁混凝土 试验研究 仿真 碾压混凝土特性 |
Property study on RCC with MgO addition and temperature simulation in t he construction of Madushan Dam under high temperatures |
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| XIE Xiang-ming.Property study on RCC with MgO addition and temperature simulation in t he construction of Madushan Dam under high temperatures[J].Journal of Xi'an University of Architecture & Technology,2011,43(1):137-142. |
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| Authors: | XIE Xiang-ming |
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| Affiliation: | XIE Xiang-ming (Hohai University,Nanjing 210098,China) |
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| Abstract: | The addition of MgO to concrete proved to be an effective way to improving the crack-preventing properties of concrete.In this work,the optimal MgO content(5.5wt%) is obtained via investigating the addition of MgO on the modulus and autogenous growth of concrete carefully.Combining with temperature controlling units embedded inside the dam,concrete with optimized MgO content was applied in the construction of Madushan Dam under high temperatures.The temperature and stress field were monitored and simulated.... |
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| Keywords: | MgO concrete experimental study simulation characteristics of RCC |
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