| 挤压成型纤维增强水泥砂浆板材的收缩性能 |
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| 引用本文： | 李启宏,侯东伟,张君.挤压成型纤维增强水泥砂浆板材的收缩性能[J].清华大学学报(自然科学版),2009(9). |
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| 作者姓名： | 李启宏 侯东伟 张君 |
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| 作者单位： | 清华大学土木工程系结构工程与振动教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(50878119) |
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| 摘 要： | 为了研究挤压成型纤维增强水泥板材的收缩性能,采用不同的纤维、水泥基材、纤维掺量和水灰质量比,探讨了各参数对板材收缩的影响。研究发现:采用低缩复合水泥作为基材的板材收缩要比普通硅酸盐水泥作为基材的板材收缩要小,约为后者的一半,甚至更低;同时采用低缩复合水泥后,板材收缩速率加快,在成型5~10 d左右即进入体积稳定期,而普通硅酸盐水泥板材收缩发展相对较慢,50 d龄期时收缩仍有发展趋势。纤维品种对板材的收缩性能影响不大;加入纤维后的板材收缩增大,且有随着纤维体积掺量增大整体收缩增大的趋势。
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| 关 键 词： | 挤压成型 纤维增强水泥板 尺寸稳定性 收缩 |
Shrinkage of extruded fiber reinforced cement mortar board |
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| LI Qihong,HOU Dongwei,ZHANG Jun.Shrinkage of extruded fiber reinforced cement mortar board[J].Journal of Tsinghua University(Science and Technology),2009(9). |
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| Authors: | LI Qihong HOU Dongwei ZHANG Jun |
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| Institution: | Key Laboratory of Structural Engineering and Vibration of Ministry of Education;Department of Civil Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The shrinkage of extruded fiber reinforced cement mortar board was investigated experimentally as a function of the cement and fiber types,water to cement ratio,and fiber content.The shrinkage was significantly reduced by using a low-shrinkage composite cement in the matrix with a shrinkage strain at 50 d of only half that of normal Portland cement board.In addition,the development of the shrinkage with time was faster for the low-shrinkage composite cement board than for the normal Portland cement board.Th... |
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| Keywords: | extrusion molding fiber reinforced cement board dimensional stability shrinkage |
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