| 高韧性纤维增强水泥基复合材料的收缩变形 |
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| 引用本文： | 邓宗才,薛会青.高韧性纤维增强水泥基复合材料的收缩变形[J].北京科技大学学报,2011,33(2):210-214. |
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| 作者姓名： | 邓宗才 薛会青 |
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| 作者单位： | 北京工业大学城市与工程安全减灾省部共建教育部重点实验室; |
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| 基金项目： | 教育部博士点基金资助项目(No.200800050012) |
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| 摘 要： | 通过试验研究了砂灰比、水灰比、纤维种类和减缩剂对高韧性纤维增强水泥基复合材料(ECC)收缩变形的影响.结果表明:随着砂灰比的增大,ECC收缩应变值逐渐减小;随着水灰比的增大,ECC收缩应变值逐渐增大;国产PVA纤维对控制ECC早期收缩变形有较明显的效果,而日本产的高弹性模量PVA纤维对控制ECC后期收缩变形效果显著;水灰比为0.40时,混杂纤维对控制ECC收缩变形的效用比单独掺入国产PVA或日本产PVA好;水灰比为0.40时,掺入减缩剂可使ECC收缩应变约减少200×10-6,可见减缩剂控制ECC收缩变形效果显著.
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| 关 键 词： | 建筑材料 增强混凝土 收缩 水泥 添加剂 |
Shrinkage distortion of fiber-reinforced high-ductility cementitious composites |
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| DENG Zong-cai,XUE Hui-qing.Shrinkage distortion of fiber-reinforced high-ductility cementitious composites[J].Journal of University of Science and Technology Beijing,2011,33(2):210-214. |
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| Authors: | DENG Zong-cai XUE Hui-qing |
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| Institution: | DENG Zong-cai,XUE Hui-qing MOE Key Laboratory of Urban Security and Disaster Engineering,Beijing University of Technology,Beijing 100124,China |
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| Abstract: | The effects of sand-to-cementitious materials ratio(S/C),water-to-cementitious materials ratio(W/C),fiber species and using a reduction additive on the shrinkage distortion of fiber-reinforced high-ductility cementitious composites(ECC) were investigated.Experimental results show that the shrinkage strain of ECC reduces with increasing S/C and enlarges with increasing W/C.Chinese PVA fibers effectively control the early stage shrinkage distortion of ECC,but Japanese PVA fibers of high Young's modulus have g... |
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| Keywords: | building materials reinforced concrete shrinkage cements additives |
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