| 轻烧MgO补偿收缩混凝土研究与工程应用进展 |
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| 引用本文： | 杨永民,侯维红,李兆恒,王立华.轻烧MgO补偿收缩混凝土研究与工程应用进展[J].广东水利水电,2016(1):1-6, 35. |
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| 作者姓名： | 杨永民 侯维红 李兆恒 王立华 |
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| 作者单位： | 1. 广东省水利水电科学研究院,广东省水利重点科研基地,广东广州 510635;华南理工大学,广东广州510640;2. 武汉三源特种建材有限责任公司,湖北武汉,430000;3. 广东省水利水电科学研究院,广东省水利重点科研基地,广东广州 510635 |
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| 摘 要： | 混凝土中引入一定量的膨胀剂,产生适度膨胀,可有效减小混凝土的收缩变形,减少混凝土开裂风险,从而提高混凝土的耐久性.该文介绍了轻烧MgO膨胀剂以及补偿收缩混凝土的应用研究现状,重点综述了MgO膨胀剂的应用和研究现状.对MgO膨胀剂的制备、含MgO混凝土的膨胀机理、相关性能以及自生体积变形数值模拟的相关研究进展进行了分析和总结.在此基础上,提出MgO自身特性对膨胀变形的影响规律、MgO自身的水化以及MgO在水泥胶凝体系中的水化对含MgO混凝土的变形影响规律、复合其它类型的膨胀剂使MgO膨胀剂的变形规律和普通混凝土的收缩相匹配等方向还需做进一步深入的系统研究.
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| 关 键 词： | 补偿收缩混凝土 MgO 应用 研究现状 展望 |
| 收稿时间： | 2016/1/29 0:00:00 |
| 修稿时间： | 2016/1/29 0:00:00 |
The research progress and application of concrete shrinkage compensation with Light burnt MgO |
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| Yongmin Yang,Weihong Hou,Zhaoheng Li and Lihua Wang.The research progress and application of concrete shrinkage compensation with Light burnt MgO[J].Guangdong Water Resources and Hydropower,2016(1):1-6, 35. |
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| Authors: | Yongmin Yang Weihong Hou Zhaoheng Li and Lihua Wang |
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| Affiliation: | Guangdong Research Institute of Water Resources and Hydropower,Guangdong Provincial Key Scientific Research Base, Guangzhou, 510635;South China University of Technology, School of Materials Science and Engineering, Guangzhou, 510640,Wuhan Sanyuan special building materials Co., Ltd.Wu Han,430000,Guangdong Research Institute of Water Resources and Hydropower,Guangdong Provincial Key Scientific Research Base, Guangzhou, 510635;South China University of Technology, School of Materials Science and Engineering, Guangzhou, 510640 and Guangdong Research Institute of Water Resources and Hydropower,Guangdong Provincial Key Scientific Research Base, Guangzhou, 510635 |
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| Abstract: | To produce moderate expansion, reduce cracks in concrete created by the shrinkage, and improve the impermeability of concrete, a certain amount of expansive agent is often added into concrete.This paper reviews emphatically preparation of MgO-based expansive agent, related performance of concrete containing light-burned magnesia, simulation of autologous volume deformation value, expansive mechanism of light-burned magnesia, influence rule of high performance concrete with light-burned magnesia. This paper raises that the following directions should be further studied systematically, including the influence of light-burned magnesia characteristics on swelling deformation, the hydration of light-burned magnesia itself and in the cement gel system, the influence of aggregate, admixture and curing system on concrete deformation with light-burned magnesia, MgO-based expansive agent coupling with other kinds of expanders which can make deformation rule and shrinkage of normal concrete match better. |
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