Mechanical properties of PVA fiber reinforced engineered cementitious composites after thermal treatment

被引：0
|
作者：
Lin J. [1 ]
Yu J. [1 ]
Li V.C. [2 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor
来源：
Yu, Jiangtao (yujiangtao@tongji.edu.cn) | 2016年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 33期
关键词：
Bridge stress; Complementary energy; Interfacial property; PVA fiber reinforced engineered cementitious composites; Strain-hardening; Thermal treatment;
D O I：
10.13801/j.cnki.fhclxb.20150522.006
中图分类号：
学科分类号：
摘要：
In order to promote the engineering application of polyvinyl alcohol (PVA) fiber reinforced engineered cementitious composites (PVA-ECC) in thermal environment, mechanical property change of PVA-ECC with high-volume of fly ash after thermal treatment was investigated through dogbone specimen tensile test. The single fiber tensile test, single fiber pullout test and single crack tensile test were conducted to explore the performance improvement mechanism of PVA-ECC. The results indicate that PVA-ECC can keep its characteristic of multiple-cracking after thermal treatment by no more than 200℃. Compared to 20℃, tensile mechanical properties are significantly improved after being treated at 50, 100, 200℃, and the rule is: 100℃>50℃>200℃.The fiber strength is not a controlled factor for the change of PVA-ECC tensile properties, and a proper thermal treatment enhances chemical bond and frictional bond between fiber and matrix, and thus increases bridge stress and crack complementary energy, which result in the improvements of tensile properties and friction energy dissipation capacity for PVA-ECC. The mechanism analysis of PVA-ECC performance variation provides a sound theoretical basis for PVA-ECC engineering design. © 2016, BUAA Culture Media Group Ltd. All right reserved.
引用
收藏
页码：116 / 122
页数：6
相关论文
共 20 条
  • [1] Li V.C., ECC-tailored composites through micromechanical modeling, Banthia N. Proceeding of Fiber Reinforced Concrete: Present and the Future Conference, pp. 64-97, (1998)
  • [2] Li V.C., From micromechanics to structural engineering-the design of cementitious composites for civil engineering applications, Journal of Structural Mechanics and Earthquake Engineering, 10, 2, pp. 1-34, (1994)
  • [3] Li V.C., On engineered cementitious composites (ECC)-A review of the material and its applications, Journal of Advance Concrete Technology, 1, 3, pp. 215-230, (2003)
  • [4] Xu S.L., Cai X.H., Experimental studies on permeability and carbonation properties of ultra high toughness cementitious composites, Acta Materiae Compositae Sinica, 27, 3, pp. 177-183, (2010)
  • [5] Qian S.Z., Li V.C., Simplified inverse method for determining the tensile strain capacity of strain hardening cementitious composites, Journal of Advance Concrete Technology, 5, 2, pp. 235-246, (2007)
  • [6] Li V.C., Strategies for high performance fiber reinforced cementitious composites development, Proceedings of International Workshop on Advances in Fiber Reinforced Concrete, pp. 93-98, (2000)
  • [7] Yu J.T., Weng W.F., Yu K.Q., Effect of different cooling regimes on the mechanical properties of cementitious composites subjected to high temperatures, The Scientific World Journal, 2014, pp. 1-7, (2014)
  • [8] Zhang L.H., Guo L.P., Sun W., Et al., Damage of ecological high ductility cemtitous composites after exposed to high temperature, Journal of the Chinese Ceramic Society, 42, 8, pp. 1018-1024, (2014)
  • [9] Sahmaran M., Ozbay E., Yucel H.E., Et al., Effect of fly ash and PVA fiber on microstructural damage and residual properties of engineered cementitious composites exposed to high temperatures, Journal of Materials in Civil Engineering, 23, 12, pp. 1735-1745, (2011)
  • [10] Redon C., Li V.C., Wu C., Et al., Measuring and modifying interface properties of PVA fibers in ECC matrix, Journal of Materials in Civil Engineering, 13, 6, pp. 399-406, (2001)
12