EFFECTS OF SUSTAINED LOADING CRACKS AND ARTIFICIAL CRACKS ON CHLORIDION DIFFUSION AND SERVICE LIFE PREDICTION UNDER FREEZE-THAW EROSION CYCLES

SHEN Bei; LIU Liqu; DIAO Bo

doi:10.13204/j.gyjzG20041411

Volume 51 Issue 6

Oct. 2021

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SHEN Bei, LIU Liqu, DIAO Bo. EFFECTS OF SUSTAINED LOADING CRACKS AND ARTIFICIAL CRACKS ON CHLORIDION DIFFUSION AND SERVICE LIFE PREDICTION UNDER FREEZE-THAW EROSION CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(6): 170-175,155. doi: 10.13204/j.gyjzG20041411

Citation:

SHEN Bei, LIU Liqu, DIAO Bo. EFFECTS OF SUSTAINED LOADING CRACKS AND ARTIFICIAL CRACKS ON CHLORIDION DIFFUSION AND SERVICE LIFE PREDICTION UNDER FREEZE-THAW EROSION CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(6): 170-175,155. doi: 10.13204/j.gyjzG20041411

Citation:

SHEN Bei, LIU Liqu, DIAO Bo. EFFECTS OF SUSTAINED LOADING CRACKS AND ARTIFICIAL CRACKS ON CHLORIDION DIFFUSION AND SERVICE LIFE PREDICTION UNDER FREEZE-THAW EROSION CYCLES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(6): 170-175,155. doi: 10.13204/j.gyjzG20041411

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EFFECTS OF SUSTAINED LOADING CRACKS AND ARTIFICIAL CRACKS ON CHLORIDION DIFFUSION AND SERVICE LIFE PREDICTION UNDER FREEZE-THAW EROSION CYCLES

doi: 10.13204/j.gyjzG20041411

SHEN Bei^1,3,
LIU Liqu^1,2,
DIAO Bo³

1. China Academy of Building Research, Beijing 100013, China;
2. National Engineering Research Center of Building Technology, Beijing 100013, China;
3. School of Transportation and Science and Engineering, Beihang University, Beijing 100191, China

Received Date: 2020-04-14
Available Online: 2021-10-27

Abstract

Abstract

The reinforced concrete (RC) structures in cold coastal regions or deicing salt condition were under the synthetic effects of loading cracks and corrosion led by freeze-thaw and chloride ingress. The steel was vulnerable to chloridion ingress because the crack provided convenient channel, which shortened the service life of RC structures. The chloridion profile of RC specimens with sustained loading cracks and artificial cracks after being subjected to the combined action of freeze-thaw and chloridion immersion was experimentally studied. This study focused on the difference between the effects of sustained load cracks and artificial cracks on chloridion diffusion and service life. In this study, the widths of sustained loading cracks were 0,0.06,0.07,0.11,0.13 mm and the widths of artificial cracks were 0,0.07,0.13,0.19 mm. The experimental results showed that, when the crack width was less than 0.07 mm, the differences between the effects of sustained loading cracks and artificial cracks on chloridion diffusion were slight. When the crack width was more than 0.07 mm, the effects of sustained loading cracks on chloridion diffusion was larger than that of artificial cracks. In addition, the differences became bigger as the crack width increased. The chloride diffusion in one-dimensional and two-dimensional state were respectively considered. The service life was predicted by Monte-Carlo Method. It was obvious that the service life of RC structures with sustained loading cracks was shorter than that with artificial cracks.
- reinforced concrete,
- freeze-thaw cycle,
- crack width,
- chloridion diffusion,
- service life prediction

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References(16)

References

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