Experimental Study on Disintegration Characteristics of Soft Rock under Acidic Environment

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Zhang, Lei^1 ; Li, Weike^2^3 ; Huang, Junguang^2 ; Lin, Huaguo^3

Guangdong University of Petrochemical Technology, Maoming, Guangdong Province

525000, China^1

Guangzhou Design Institute, Guangdong Province, China Guangzhou University, Guangzhou, Guangdong Province, Guangzhou

510620, China^2

Guangdong Engineering Investigation Institute, Guangdong Province, Guangzhou

510510, China^3

关键词: Acidic environment;    Acidic solutions;    Disintegration characteristics;    Grain size;    Large particles;    Research object;    Small particles;    South China;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/6/062025/pdf
DOI  :  10.1088/1755-1315/267/6/062025

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The Red-bed soft rock is widely distributed in South China, and it has been exposed to acid rain for a long time, which brings great risks to the stability of the engineerings. Therefore, the Red-bed soft rock in South China is selected as the research object. A disintegration test under acidic environment was carried out, and the law of grain size change during disintegration is obtained. The reaserch shows that: (1) Disintegration is a process in which large particles gradually transform into small particles; (2) Acidic environment promotes the disintegration of Red-bed soft rock, and the stronger the acidity, the stronger the disintegration; (3) In acidic environment, the disintegration of Red-bed soft rock can be divided into three stages: water absorption stage, rapid disintegration stage and slow disintegration stage; (4) Red-bed soft rock disintegration to different acidic solutions is different, which HNO3 dominates the disintegration than H2SO4; (5) Due to the dissolution of mud, the main minerals participate in the reaction, causing rock cementation loss withpores larger, and finally lead to the softening and disintegration of the Red-bed soft rock.