| 表观密度和聚丙烯纤维对泡沫混凝土收缩开裂的影响 |
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| 引用本文： | 马一平,李国友,杨利香,张乐.表观密度和聚丙烯纤维对泡沫混凝土收缩开裂的影响[J].材料导报,2012,26(6):121-125. |
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| 作者姓名： | 马一平 李国友 杨利香 张乐 |
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| 作者单位： | 1. 同济大学先进土木工程材料教育部重点实验室,上海,201804
2. 上海市建筑科学研究院,上海,200032 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(2009CB623104-5);2010年度“创新行动计划”世博科技专项(10DZ0583600) |
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| 摘 要： | 以普通硅酸盐水泥为胶凝材料制备了表观密度达130kg/m3、强度为0.23MPa的低表观密度泡沫混凝土。探讨了表观密度和聚丙烯纤维对泡沫混凝土性能的影响。结果表明,表观密度的下降可显著降低泡沫混凝土的强度和弹性模量,减轻塑性收缩开裂程度;聚丙烯纤维对低表观密度泡沫混凝土干燥收缩和硬化早期干缩开裂的抑制效果显著。
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| 关 键 词： | 泡沫混凝土 表观密度 聚丙烯纤维 弹性模量 塑性收缩 干缩开裂 |
Effect of the Apparent Density and Polypropylene Fiber on Drying Shrinkage Cracking Properties of Foam Concrete |
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| MA Yiping
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LI Guoyou
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YANG Lixiang
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ZHANG Le.Effect of the Apparent Density and Polypropylene Fiber on Drying Shrinkage Cracking Properties of Foam Concrete[J].Materials Review,2012,26(6):121-125. |
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| Authors: | MA Yiping LI Guoyou YANG Lixiang ZHANG Le |
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| Affiliation: | 1 (1 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 201804; 2 Shanghai Research Institute of Building Sciences,Shanghai 200032) |
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| Abstract: | Foamed concrete of low apparent density was prepared by using Portland cement as binder,the apparent density and compressive strength of this concrete reached to 130kg/m3 and 0.23MPa,respectively.The results indicate that the lower density of foamed concrete can decrease the compressive strength and elastic modulus,reduce the degree of plastic shrinkage.In addition,adding polypropylene fiber significantly improves resistance drying shrin-kage and the early drying shrinkage cracking of hardened foamed concrete. |
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| Keywords: | foamed concrete density polypropylene fiber elastic modulus plastic shrinkage drying shrin-kage cracking |
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