| 水泥基砂浆加固混凝土构件界面粘结强度的研究 |
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| 引用本文： | 方萍,黄政宇,尚守平,张瑞文.水泥基砂浆加固混凝土构件界面粘结强度的研究[J].建筑结构学报,2010,31(3):45-50. |
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| 作者姓名： | 方萍 黄政宇 尚守平 张瑞文 |
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| 作者单位： | 湖南大学建筑结构安全与建筑节能教育部重点实验室; |
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| 基金项目： | 中国工程建设标准化协会规程项目(2005)建标协字第14号;;湖南省科技计划重点项目(06sk4057);;交通部、湖南省交通厅科研基金项目(200514) |
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| 摘 要： | 研究了在采用不同的界面剂处理下,水泥基砂浆加固混凝土构件的界面粘结抗拉强度和粘结抗剪强度,并进行了加固砂浆和基层混凝土的界面处的微观结构观测分析。研究结果表明:界面剂对提高界面粘结强度有利,纯水泥净浆不能用作界面剂;硅粉、膨胀剂和高效减水剂合用能有效增强水泥基界面剂的粘结强度并控制干缩开裂;以超细硅酸盐水泥代替普通硅酸盐水泥,水泥基界面剂的粘结抗拉强度可提高60%,28d后强度基本稳定;可再分散聚合物胶粉能明显提高水泥基界面剂的粘结强度。
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| 关 键 词： | 超细水泥 混凝土构件加固 静力试验 可再分散聚合物胶粉 水泥基界面剂 粘结抗剪强度 粘结抗拉强度 |
| 收稿时间： | 2010-06-05 |
| 修稿时间： | 2010-06-05 |
Study on interfacial adhesive strength between cement-based mortar and concrete substrate |
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| FANG Ping,HUANG Zhengyu,SHANG Shouping,ZHANG Ruiwen.Study on interfacial adhesive strength between cement-based mortar and concrete substrate[J].Journal of Building Structures,2010,31(3):45-50. |
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| Authors: | FANG Ping HUANG Zhengyu SHANG Shouping ZHANG Ruiwen |
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| Affiliation: | Key Laboratory of Building Safety and Energy Efficiency of China Ministry of Education/a>;Hunan University/a>;Changsha 410082/a>;China |
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| Abstract: | The paper discuss the interfacial adhesive tensile strength and the adhesive shearing strength between the cement-based mortar and the concrete substrate,as well as the microstructures of the interfacial zones between the new mortars and the old mortars.The study shows that the interfacial agents can improve the interfacial adhesive strength.The pure cement pastes cannot be used as interfacial agents.The mixture of silica fume,expansion agents,and superplasticizer increases the adhesive strength and control... |
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| Keywords: | RC member strengthing superfine cement re-disappeared polymer powders cement-based interfacial agent static test adhesive tensile strength the adhesive shearing strength |
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