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| 高韧性PVA-SHCC多缝开裂后吸水特性研究 | |
| 引用本文： | 张鹏,F. H. WITTMANN,赵铁军,E. LEHMANN,田砾. 高韧性PVA-SHCC多缝开裂后吸水特性研究[J]. 建筑材料学报, 2011, 14(3). DOI: 10.3969/j.issn.1007-9629.2011.03.007 |
| 作者姓名： | 张鹏 F. H. WITTMANN 赵铁军 E. LEHMANN 田砾 |
| 作者单位： | 1. 青岛理工大学土木工程学院,山东青岛,266033 2. 青岛理工大学土木工程学院,山东青岛266033;弗莱堡Aedificat研究所,弗莱堡D-79100 3. Paul Scherrer Institute裂变中子源中心, Villigen PSI, CH-5232 |
| 基金项目： | 国家重点基础研究发展规划(973计划)项目(2009CB623203); 国家自然科学基金资助项目(50739001,51008165); 山东省自然科学基金资助项目(ZR2009FQ014); 铁道部科研计划项目(2008G031-14) |
| 摘 要： | 制备了高韧性PVA-SHCC(聚乙烯醇-应变硬化水泥基复合材料)试件,通过吸水试验和中子成像试验,研究了未开裂和直拉多缝开裂情况下SHCC的吸水特性.结果表明:中子成像能够对无裂缝和多缝开裂SHCC试件的吸水过程进行可视化追踪和定量分析计算;SHCC在无裂缝时吸水很少,中子成像无肉眼可见的水分前锋;多缝开裂后,能够清晰探测到水分沿80～140μm的裂缝迅速侵入材料内部,并通过遭横向拉拔破坏的纤维与水泥基体界面而充满裂缝区;在这种情况下,应从耐久性角度限制SHCC多重裂缝宽度. |
| 关 键 词： | 应变硬化水泥基复合材料 聚乙烯醇纤维 多缝开裂 吸水 中子成像 |
Water Absorption of High Toughness PVA-SHCC after Multi-cracking |
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| ZHANG Peng,F. H. WITTMANN,ZHAO Tie-jun,E. LEHMANN,TIAN Li. Water Absorption of High Toughness PVA-SHCC after Multi-cracking[J]. Journal of Building Materials, 2011, 14(3). DOI: 10.3969/j.issn.1007-9629.2011.03.007 | |
| Authors: | ZHANG Peng F. H. WITTMANN ZHAO Tie-jun E. LEHMANN TIAN Li |
| Affiliation: | ZHANG Peng~1,F.H.WITTMANN~(1,2),ZHAO Tie-jun~1,E.LEHMANN~3,TIAN Li~1 (1.School of Civil Engineering,Qingdao Technological University,Qingdao 266033,China,2.Aedificat Institute Freiburg,D-79100 Freiburg,Germany,3.Department of Spallation Neutron Source,Paul Scherrer Institute,CH-5232 Villigen PSI,Switzerland) |
| Abstract: | High toughness PVA-SHCC(polyvinyl alcohol-strain hardening cement-based composite) specimens were prepared.Through water absorption test and neutron radiography,water absorption of SHCC with and without multi-cracks under direct uniaxial tensile loading was investigated.The results indicate that neutron radiography can achieve visualized tracing of water penetration process and quantification of water distribution in uncracked and multi-cracked SHCC.Uncracked SHCC absorbs only little water;consequently no w... |
| Keywords: | strain hardening cement-based composite(SHCC) polyvinyl alcohol(PVA) fiber multi-cracking water absorption neutron radiography |
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