Experimental study on acid dissolution damage characteristics of bedded limestone

WU Zongqin; ZUO Shuangying; WANG Lu; LI Benyun; LIU Jing

doi:10.16030/j.cnki.issn.1000-3665.202211077

2023 Vol. 50, No. 6

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Article navigation > Hydrogeology & Engineering Geology > 2023 > 50(6): 193-203

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WU Zongqin, ZUO Shuangying, WANG Lu, LI Benyun, LIU Jing. Experimental study on acid dissolution damage characteristics of bedded limestone[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 193-203. doi: 10.16030/j.cnki.issn.1000-3665.202211077

Citation:

WU Zongqin, ZUO Shuangying, WANG Lu, LI Benyun, LIU Jing. Experimental study on acid dissolution damage characteristics of bedded limestone[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 193-203. doi: 10.16030/j.cnki.issn.1000-3665.202211077

Experimental study on acid dissolution damage characteristics of bedded limestone

1.
College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou　550025, China
2.
Key Laboratory of Karst Geological Resources and Environment, Ministry of Education, Guizhou University, Guiyang, Guizhou　550025, China
3.
Guizhou Transportation Planning Survey and Design Institute Co. Ltd., Guiyang, Guizhou　550081, China

More Information

Corresponding author: ZUO Shuangying, syzuo@gzu.edu.cn

Received Date: 29 November 2022

Revised Date: 18 February 2023

Publish Date: 15 November 2023

Abstract

Abstract

In southwest China, carbonate rocks are widely distributed. It has unique dissolution features which bring a lot of resistance to engineering constructions. In order to explore the dissolution damage regular of layered carbonate rocks in acidic water, a self-made flow dissolution system was used to conduct laboratory dissolution tests on limestone cores under four different conditions. The mass loss, the change of p-wave velocity, the mass concentration of Ca²⁺ and Mg²⁺ and the morphology of the core surface were obtained. Mass loss rate after dissolution of layered limestone was used to define the damage variation. Through multivariate statistical regression analysis, the relationship between four different arguments (bedding dip Angle, pH, velocity of flow, dissolution time) and dissolution damage variation was established. The results show that the dissolution damage of layered limestone has a good mathematical relationship between the four different arguments. The following conclusions can be drawn from the analysis: The time has a significant effect on the dissolution damage of bedded limestone, followed by the velocity and pH. Under the same acidic environment, the dissolution effect shows a rule of 90° >0° >45° >30° >75° >15° >60° for limestone with different bedding inclination angles. The bedded angle has less effect on the dissolution of limestone than other factors, but plays a decisive role in the surface dissolution morphology of rock samples. The results of this study can provide some reference for engineering practice and geological disaster control in limestone areas.
- bedded limestone /
- acid corrosion /
- longitudinal wave velocity of rock /
- dissolution damage /
- dissolution damage variation

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References

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