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赵冬雪, 璩继立.钢纤维、玄武岩纤维及聚丙烯纤维对自密实混凝土性能的影响研究水资源与水工程学报[J].,2016,27(5):174-179
钢纤维、玄武岩纤维及聚丙烯纤维对自密实混凝土性能的影响研究
Study on impact of steel fiber, basalt fiber and polypropylene fiber on properties of self-compacting concrete
  
DOI:10.11705/j.issn.1672-643X.2016.05.32
中文关键词:  自密实混凝土  纤维  流动性  抗压强度  劈裂强度
英文关键词:self-compacting concrete  fiber  liquidity  compressive strength  splitting strength
基金项目:诺华上海实验室科研经费(3A-11-307-110)
作者单位
赵冬雪, 璩继立 (上海理工大学 环境与建筑学院, 上海 200093) 
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中文摘要:
      在混凝土中掺加纤维材料,能够改善自密实混凝土抗拉性能差与延性差的缺点。在分别加入钢纤维、玄武岩纤维与聚丙烯纤维掺料的基础上,通过对自密实混凝土进行塌落扩展度、V型漏斗、L仪试验、抗压强度试验与劈裂试验,研究了纤维种类、纤维体积率与纤维尺寸对自密实混凝土流动性、间隙通过性、抗压强度及劈裂强度的影响。试验结果表明:纤维长度越大、掺量越大,其对自密实混凝土流动性的抵抗作用越强,其中玄武岩纤维的影响最明显,聚丙烯纤维其次,钢纤维相对较弱。除长度在6mm时,钢纤维可少量增强混凝土抗压强度,其他长度对抗压强度的影响不明显;聚丙烯纤维和玄武岩纤维均明显削弱了抗压强度,当聚丙烯纤维体积掺量为0.3%和长度为6mm时,混凝土抗压强度下降了55.8%。钢纤维对劈裂强度有明显影响:短钢纤维具有削弱作用,长钢纤维具有明显增强作用;但钢纤维的掺量对劈裂强度影响不大。此外,聚丙烯纤维和玄武岩纤维对劈裂强度的影响较弱。
英文摘要:
      Mixing fibrous material in self-compacting concrete (SCC)can improve the shortcomings of less tensile strength and poor ductility.Based on adding steel fiber, basalt fiber and polypropylene fiber into SCC, this paper conducted slump flow test, V funnel test, L meter test, compressive strength test and split test to investigate the impact of some factors including fiber types, dosage and length on fluidity, passing quality through gaps, compressive strength and splitting strength of SCC materials. Results showed that the resistance to fluidity increases with fiber length and dosage. The influence of basalt fiber is the most obvious, then followed polypropylene fiber, the inflrence of steel fiber is relatively the weakest.Length of steel fiber exerts little influence on compressive strength of SCC, except for 6mm steel fiber.However. The influence of other length of steel fiber on compressive strength of SCC is not notable. Both basalt fiber and polypropylene fiber can obviously weaken compressive strength. When dosage and length of polypropylene are 0.3% and 6mm respectively The compressive strength of SCC decreases by 55.8%.Steel fiber has obvious impacts on splitting strength, while short one can reduce it and long one can greatly enhance it. however,the dosage of steel fiber has little impact on splitting strength.In addition, polypropylene fiber and basalt fiber have the weaker influence on splitting strength of SCC.
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