| 基于当地材料制备高延性水泥基复合材料的研究(英文) |
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| 引用本文： | 钱吮智,张志刚.基于当地材料制备高延性水泥基复合材料的研究(英文)[J].东南大学学报,2012(3):327-330. |
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| 作者姓名： | 钱吮智 张志刚 |
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| 作者单位： | 东南大学交通学院 |
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| 基金项目： | The National Natural Science Foundation of China (No.51008071,51278097);the Natural Science Foundation of Jiangsu Province(No.BK2010413);Teaching & Research Excellence Grant for Young Faculty Member at Southeast University;the Program for Special Talents in Six Major Fields of Jiangsu Province(No.2011-JZ-011);the Scientific Research Innovation Project for College Graduates in Jiangsu Province(No.CXLX_0136) |
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| 摘 要： | 为了降低高性能聚乙烯醇(polyvinyl alcohol,PVA)纤维增强水泥基复合材料ECC(engineered cemen-titious composites)的成本,用国产PVA纤维和其他本地原材料如粉煤灰、水泥和细砂等研制了高延性ECC材料.采用四点弯曲试验和光学显微镜研究了ECC的弯曲变形能力、裂缝宽度及裂缝自愈合现象,并对其进行了经济性分析.实验结果表明:利用国产原料制备的ECC均表现出大变形能力,平均裂缝宽度能控制在60μm左右;开裂的试件经过干湿循环养护之后,裂缝中出现了自愈合现象;经济性分析表明利用国产PVA纤维可以极大地降低ECC成本.利用国产PVA纤维等材料制备高性价比的ECC是可行的.
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| 关 键 词： | 高延性水泥基复合材料 高延性 材料成本 可行性分析 |
Development of engineered cementitious composites with local ingredients |
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| Qian Shunzhi Zhang Zhigang.Development of engineered cementitious composites with local ingredients[J].Journal of Southeast University(English Edition),2012(3):327-330. |
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| Authors: | Qian Shunzhi Zhang Zhigang |
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| Institution: | Qian Shunzhi Zhang Zhigang(School of Transportation,Southeast University,Nanjing 210096,China) |
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| Abstract: | In order to reduce the cost of high performance polyvinyl alcohol(PVA) fiber reinforced cementitious material(called engineered cementitious composites,ECC),a ductile ECC material is developed using domestic PVA fibers along with other local ingredients,such as fly ash,cement and sand.In addition to the economic analysis of ECC,the four-point bending test and the optical microscope are employed to investigate the deflection capacity of ECC,its crack width and the occurrence of the self-healing phenomenon.The experimental results suggest that ECC made with domestic ingredients exhibits larger deformability and the average crack width is controlled around 60 μm.Furthermore,the self-healing behavior is observed in cracks of the specimens after cycles of wet and dry curing.The economic analysis shows that the cost of ECC can be greatly reduced via employing domestic PVA fibers.It is,therefore,feasible to produce low cost ECC material employing domestic PVA fibers,while simultaneously retaining high material ductility. |
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| Keywords: | engineered cementitious composites(ECC) high tensile ductility material cost feasibility study |
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