| 摘要: |
| 通过10组不同配合比的聚乙烯醇纤维增强水泥基复合材料(PVA FRCC)试件的收缩试验，研究了纤维体积分数、水胶比、砂胶比及不同养护环境下PVA FRCC试件的收缩性能.结果表明：PVA纤维的掺入减小了基材的收缩，但效果有限；PVA FRCC试件的收缩随水胶比的减小、砂胶比的增大及周围介质相对湿度的升高而减小.另外，根据试验结果并结合现有混凝土材料收缩计算模型，提出了PVA FRCC收缩估算模型，比较后发现，估算模型的计算值与试验值具有较高的吻合度. |
| 关键词: 聚乙烯醇纤维水泥基复合材料 收缩 影响因素 估算模型 |
| DOI：103969/j.issn.1007 9629202006005 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51968056，51768051)；内蒙古自治区科技创新引导奖励资金项目(KCBJ2018016)；内蒙古自治区科技成果转化专项资金项目(2019CG072) |
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| Experimental Study on Shrinkage Behaviors of PVA FRCC |
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WANG Yuqing1, LIU Xiao1, LIU Shuguang2
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1.School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;2.School of Mining and Technology, Inner Mongolia University of Technology, Hohhot 010051, China
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| Abstract: |
| Based on the shrinkage tests of 10groups of PVA FRCC(polyvinyl alcohol fiber reinforced cementitious composite) specimens with different mixture proportion, the shrinkage behaviors of PVA FRCC materials under different fiber volume fraction, water binder ratio, sand binder ratio and curing environment were studied. The results show that the shrinkage of PVA FRCC is reduced by adding PVA fibers, but the effect is limited. The shrinkage of substrate decreases with the decrease of water binder ratio, the increase of sand binder ratio and the increase of ambient humidity. Combining the existing concrete shrinkage estimation models and the test results, a model for shrinkage estimation of PVA FRCC is proposed, the calculation values with the model formulas are in good agreement with the test values. |
| Key words: polyvinyl alcohol fiber reinforced cementitious composite(PVA FRCC) shrinkage influence factor estimation model |
