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ZHANG Yun-qing, YU Hong-fa, SUN Wei, LIU Jun-long, ZHANG Jian-ye. Effect of magnesium sulfate solution on frost resistance of concrete under stress condition[J]. Journal of Traffic and Transportation Engineering, 2010, 10(6): 15-19. doi: 10.19818/j.cnki.1671-1637.2010.06.003
Citation: ZHANG Yun-qing, YU Hong-fa, SUN Wei, LIU Jun-long, ZHANG Jian-ye. Effect of magnesium sulfate solution on frost resistance of concrete under stress condition[J]. Journal of Traffic and Transportation Engineering, 2010, 10(6): 15-19. doi: 10.19818/j.cnki.1671-1637.2010.06.003
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Effect of magnesium sulfate solution on frost resistance of concrete under stress condition

doi: 10.19818/j.cnki.1671-1637.2010.06.003
  • 1.

    School of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China

  • 2.

    School of Materials Science and Engineering, Southeast University, Nanjing 211189, Jiangsu, China

  • 3.

    Department of Civil Engineering, Zhejiang College of Construction, Hangzhou 311231, Zhejiang, China

  • 4.

    China Civil Engineering Construction Corporation, Beijing 100038, China

More Information
  • Author Bio:

    ZHANG Yun-qing(1977-), female, doctoral student, +86-25-84895233, zhangyunqing@nuaa.edu.cn

    YU Hong-fa(1964-), male, professor, PhD, +86-25-84895233, yuhongfa@nuaa.edu

  • Received Date: 2010-07-11
  • Publish Date: 2010-12-25
    Abstract
  • The frost resistances of three kinds of concretes under flexural stress subjected to water and 5% MgSO4 (mass fraction) solution were studied by using accelerated freezing-thawing method. The considered concretes include high strength concrete (HSC) added with 20% fly ash (20% of binder mass), high-volume mineral admixture concrete (HVMAC) added with 40% fly ash, 10% slag and 5% silica fume, and high durable concrete (HDC) added with high-volume mineral admixture, air-entraining agent, superplasticizer, fibres and expansion agent. Third point loading method was applied on the specimens in the process of freezing-thawing cycle, and the enacted flexural stress was 35% of failure stress. Analysis result shows that the frost resistances of HSC and HDC respectively increase 46 times and more than 70% under flexural stress subjected to MgSO4 solution as compared with water, and their anti-freezing-thawing cycles are respectively more than 425 times and 900 times. But the frost resistance of HVMAC decreases by 67% under flexural stress, and its anti-freezing-thawing cycles are only 75 times.

     

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