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YAN Wu-jian, NIU Fu-jun, WU Zhi-jian, NIU Fu-hang, LIN Zhan-ju, NING Zuo-jun. Mechanical property of polypropylene fiber reinforced concrete under freezing-thawing cycle effect[J]. Journal of Traffic and Transportation Engineering, 2016, 16(4): 37-44. doi: 10.19818/j.cnki.1671-1637.2016.04.004
Citation: YAN Wu-jian, NIU Fu-jun, WU Zhi-jian, NIU Fu-hang, LIN Zhan-ju, NING Zuo-jun. Mechanical property of polypropylene fiber reinforced concrete under freezing-thawing cycle effect[J]. Journal of Traffic and Transportation Engineering, 2016, 16(4): 37-44. doi: 10.19818/j.cnki.1671-1637.2016.04.004
shu

Mechanical property of polypropylene fiber reinforced concrete under freezing-thawing cycle effect

doi: 10.19818/j.cnki.1671-1637.2016.04.004
  • 1.

    State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China

  • 2.

    School of Resources and Environment, University of Chinese Academy of Sciences, Beiing 100049

  • 3.

    Key Laboratory of Loess Earthquake Engineering of China Earthquake Administration, Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, Gansu, China

  • 4.

    State Key Laboratory of Road Engineering Safety and Health in Cold and High-Altitude Regions, CCCC First Highway Consultants Co., Ltd., Xi'an 710075, Shaanxi, China

  • 5.

    Gansu Science Research Institute of Civil Engineering, Lanzhou 730020, Gansu, China

More Information
  • Author Bio:

    YAN Wu-jian(1980-), male, associate researcher, doctoral student, +86-931-4617275, yanwj1980@126.com

    NIU Fu-jun(1970-), male, researcher, PhD, +86-931-4967263, niufujun@lzb.ac.cn

  • Received Date: 2016-04-01
  • Publish Date: 2016-08-25
    Abstract
  • Through fast freezing-thawing cycle test on four groups of polypropylene fiber reinforced concretes with different mix proportions, the compressive strength, longitudinal wave velocity and dynamic elastic modulus of concrete after different times of freezing-thawing cycleswere obtained, the mechanical property and damage amount characteristics of polypropylene fiber reinforced concrete under freezing-thawing cycle effect were studied, and the effects of material property, material mix proportion and times of freezing-thawing cycles on the mechanical property were analyzed. Analysis result shows that after 200 times of freezing-thawing cycles, the compressive strength loss rates of C30 polypropylene fiber reinforced concrete without air entraining agent, C30 polypropylene fiber reinforced concrete with air entraining agent, C40 polypropylene fiber reinforced concrete without air entraining agent and C40 polypropylene fiber reinforced concrete with air entraining agent are 46. 53%, 49.05%, 34.56%and 37.64%respectively. After 300 times of freezingthawing cycles, the longitudinal wave velocities of four groups of polypropylene fiber reinforced concretes decrease by 8.42%, 6.48%, 16.72%and 11.68%respectively, and the dynamic elastic moduli decrease by 46. 54%, 35.72%, 54.41% and 53.72% respectively. After 150 times of freezing-thawing cycles, the damage amounts of C30 and C40polypropylene fiber reinforced concrete increase rapidly, and the damage amount of C40 polypropylene fiber reinforced concrete is bigger than that of C30 polypropylene fiber reinforced concrete. Under the same times of freezing-thawing cycles, the damage amount of C40 polypropylene fiber reinforced concrete without air entraining agent is biggest. The improving effects on frost resistance property from big to small are C30 polypropylene fiber reinforced concrete with air entraining agent, C30 polypropylene fiber reinforced concrete without air entraining agent, C40 polypropylene fiber reinforced concrete with air entraining agent, C40 polypropylene fiber reinforced concrete without air entraining agent.

     

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