Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (7): 50-56.doi: 10.3969/j.issn.1000-565X.2015.07.008

• Architecture & Civil Engineering • Previous Articles     Next Articles

Dynamic Mechanical Properties of Hybrid Fiber-Reinforced Cement-Based Composites

Yang Hui-xian1 Huang Yan-sheng1,2 Li Jing1,2   

  1. 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. State Key Laboratory of Subtropical Building Science, South China University of Tehnology, Guangzhou 510640, Guangdong, China
  • Received:2014-12-29 Revised:2015-04-03 Online:2015-07-25 Published:2015-06-03
  • Contact: 李静( 1971-) ，女，博士，副教授，主要从事新型结构、新型建筑材料研究． E-mail:cvjingli@scut.edu.cn
  • About author:杨惠贤( 1984-) ，男，博士生，主要从事新型建筑材料研究． E-mail: winerxian@163.com
  • Supported by:
    Supported by the Opening Fundation of the State Key Lab of Subtropical Building Science of China( 2012KB28)

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Abstract: The impact compression tests of hybrid fiber ( steel and polyvinyl alcohol ( PVA) fiber) -reinforced cement- based composites ( HFRCC) of different ratios were conducted at different strain rates by using a split Hopkinson pressure bar ( SHPB) . Then, their dynamic compressive strength, peak strain and tenacity are compared. The results show that (1) HFRCC is sensitive to strain rates; (2) the peak strain increases with the PVA fiber content and the addition of steel fiber can increase the dynamic compressive strength; (3) to increase the PVA fiber content can decrease the dynamic strength increase factor; and (4) at a low strain rate and before the stress reaches up to a peak, the relative contents of two kinds of fibers have little influence on the tenacity of HFRCC. At a high strain rate, however, the steel fiber can effectively improve the tenacity of HFRCC.

Key words: steel fiber, polyvinyl alcohol fiber, hybrid fiber-reinforced cement-based composites, strain rate, impact test, dynamic mechanical property

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