Open AccessAnalysis of pH and Conductivity Variation Characteristics of Coal Gangue Used inFreeway Subgrade and Its Correlation
Author(s) -
Gonghua Song,
Bing Hui,
Yanji Cui,
Deqin Ran,
Yanpei Li,
Wenjun Zhang,
Haimin Song,
Xiangxi Fan,
Lingxiao Meng
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/632/2/022010
Subject(s) - subgrade , gangue , coal , environmental science , coal mining , geotechnical engineering , pollution , positive correlation , mining engineering , mineralogy , materials science , pulp and paper industry , waste management , geology , metallurgy , engineering , medicine , ecology , biology
Coal gangue is a common solid waste in coal mining area, which causes great environmental pollution. Using coal gangue as filling material of highway subgrade can turn waste into treasure. In order to study the greening situation of the road section with coal gangue instead of soil as subgrade filling material, the pH and electrical conductivity (EC) were studied, The electrical conductivity (EC) and pH value of coal gangue used in a highway subgrade test section under different soaking time and initial pH solution were measured, and their change characteristics were analyzed. Both of them increased with the extension of time, and the change trend of EC was more severe. The results of correlation analysis showed that pH and EC were highly positively correlated, and the correlation coefficients were 0.7941, 0.8198 and 0.8639 at initial ph4.1, 5.2 and 6.5, respectively. On the whole, pH is proportional to EC. By mastering the change characteristics and correlation between pH and conductivity of coal gangue under different pH conditions, it can provide certain data and theoretical support for the greening research of coal gangue as subgrade filler.