Predictions for Carbonation Depth of Marine Concrete Under Different Temperature and Humidity Environments Based on Levenberg-Marquart Algorithm

DU Ting; QU Pengyu; JI Xiankun; LI Zhiying; WANG Benwu; CHEN Sen

doi:10.3724/j.gyjzG23083020

Volume 54 Issue 7

Jul. 2024

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DU Ting, QU Pengyu, JI Xiankun, LI Zhiying, WANG Benwu, CHEN Sen. Predictions for Carbonation Depth of Marine Concrete Under Different Temperature and Humidity Environments Based on Levenberg-Marquart Algorithm[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(7): 217-222. doi: 10.3724/j.gyjzG23083020

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Predictions for Carbonation Depth of Marine Concrete Under Different Temperature and Humidity Environments Based on Levenberg-Marquart Algorithm

doi: 10.3724/j.gyjzG23083020

DU Ting^1,2,
QU Pengyu²,
JI Xiankun^{3,4
,
,},
LI Zhiying²,
WANG Benwu²,
CHEN Sen⁵

1. School of Civil and Engineering Management, Guangzhou Maritime University, Guangzhou 510725, China;
2. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
3. State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China;
4. Wuhan Sanyuan Special Building Materials Co., Ltd., Wuhan 430083, China;
5. China Nuclear Power Operation Technology Co., Ltd., Wuhan 430000, China

Received Date: 2023-08-30
Available Online: 2024-08-16

Abstract

Abstract

The rapid carbonation experiment of 12 groups of marine concrete was carried out under different temperature and relative humidity conditions. The experimental results showed that temperature and relative humidity had a significant impact on carbonation resistance of marine concrete. With the increase of relative humidity, the carbonation depth of marine concrete was characterized by an initial increase and then decreased, showing a parabolic relation. Moreover, when the relative humidity was very low or very high, the carbonation rate of marine concrete was infinitely slow. While the carbonation rate of marine concrete was accelerated with the increase of temperature, the relation between carbonation depth and temperature was an exponential function. In addition, based on experimental and theoretical analysis, the temperature and humidity influence coefficients were introduced to improve the existing mathematical model of carbonation depth, and by using the Levenberg-Marquart algorithm to fit a nonlinear surface to the experimental data, a prediction model of the carbonation depth of marine concrete was constructed. This model could predict the carbonation depth of marine concrete under different temperature and humidity conditions.
- marine concrete,
- carbonation depth,
- relative humidity,
- temperature,
- carbonation model

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References(22)

References

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