Optimization of mix proportion and experimental analysis of mechanical properties of hybrid PVA-ECC
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National Natural Science Foundation of China (No. 51208093,5141101015); Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20120092120021)

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    Abstract:

    In order to reduce the production cost of Engineered Cementitious Composites (ECC), it is very necessary to substitute part of the expensive Japanese PVA fibers with the homemade PVA fibers for the ease of extensive application of the practical structures.Based on the ECC design theory, an optimal design for the fiber volume content of hybrid PVA-ECC is analyzed, taking both compressive strength and tensile strain capacity into account. The mechanical behavior of hybrid PVA-ECC is obtained through the four-point bending test and uniaxial compressive test. Experimental results indicate that the strain hardening and multiple cracking behavior of hybrid PVA-ECC are observed in the test, and the long-term compressive strength is distinctly increased. Furthermore, a modified inverse method based on the UM method is proposed, to use the measured data of four-point bending test to calculate the tensile strain capacity of ECC, and the proposed method is verified with the experimental results of hybrid PVA- ECC specimens.

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乔治,潘钻峰,孟少平,张德锋,刘籍蔚.混杂PVA-ECC配合比优化设计及力学性能试验研究[J].土木与环境工程学报(中英文),2015,37(5):72~81

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History
  • Received:March 16,2015
  • Revised:
  • Adopted:
  • Online: November 18,2015
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