Damage Constitutive Model of Concrete Under Industrial SO<sub>2</sub> Corrosive Environment

NIU Ditao; WU Hongqu; HUANG Jie; LUY Yao; YANG Ruixi

doi:10.3724/j.gyjzG24021904

Volume 54 Issue 8

Aug. 2024

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NIU Ditao, WU Hongqu, HUANG Jie, LUY Yao, YANG Ruixi. Damage Constitutive Model of Concrete Under Industrial SO2 Corrosive Environment[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(8): 96-103. doi: 10.3724/j.gyjzG24021904

Citation:

NIU Ditao, WU Hongqu, HUANG Jie, LUY Yao, YANG Ruixi. Damage Constitutive Model of Concrete Under Industrial SO₂ Corrosive Environment[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(8): 96-103. doi: 10.3724/j.gyjzG24021904

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Damage Constitutive Model of Concrete Under Industrial SO₂ Corrosive Environment

doi: 10.3724/j.gyjzG24021904

1. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. State Key Laboratory of Green Building, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received Date: 2024-02-19
Available Online: 2024-09-19

Abstract

Abstract

To investigate the stress-strain characteristics of concrete under industrial SO₂ corrosion, and evaluate the mechanical characteristics of concrete, the concrete corrosion tests in industrial SO₂ environment were conducted to analyze the effects of water-to-cement ratio (0.37, 0.47 and 0.57), fly ash content (0%, 10% and 20%), and SO₂ cycling times on the danage thickness of damage layers, stress-strain curves, peak stress, peak strain, and elastic modulus. A constitutive model was formulated by using the principles of damage mechanics theory. The results indicated that the thickness of the damage layer rose as the quantity of SO₂ cycles increased, with the change adhering to an exponential function correlation. The specimens experienced a decrease in peak stress, an increase in peak strain, and a decrease in elastic modulus after being corroded by SO₂. The downward slope of the curve became steeper, significantly reducing the deformation capacity and ultimately exhibiting characteristics of a brittle failure. Adding fly ash could mitigate the corrosion rate of SO₂ and enhance the concrete resistance against SO₂ corrosion.
- concrete,
- industrial environment,
- SO₂ corrosion,
- damage layer thickness,
- constitutive model

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References(24)

References

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