Effect of magnesium sulfate solution on frost resistance of concrete under stress condition

ZHANG Yun-qing; YU Hong-fa; SUN Wei; LIU Jun-long; ZHANG Jian-ye

doi:10.19818/j.cnki.1671-1637.2010.06.003

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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

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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

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.
- concrete,
- flexural stress,
- magnesium sulfate corrosion,
- frost resistance,
- relative dynamic elastic modulus

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References(15)

References

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Effect of magnesium sulfate solution on frost resistance of concrete under stress condition

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