Impact of Initial pH Change of Kaolinite on Its Microstructure and Consolidation Characteristics

Authors

Civil Engineering Department, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract

Acidic agents are considered as one of the most prevalent contaminants on the earth. Several sites are exposed to acidic pollutants like Acetic acid (Olgun and Yildiz, 2012). According to previous researches, the causes of acidic contaminations in soil could be natural processes like weathering of pyrite in mudstone, or human activities like municipal waste storage, accidental spills or acidic rain (Gratchev and Towhata, 2013). On the other hand, changes of the chemical properties of the pore fluid have a considerable effect on the geotechnical characteristics of clay including the compressibility and the shear strength parameters all of which are important parameter on the strength and the stability of earth structures and constructions on the soil. Therefore, it seems to be necessary to recognize and analyze the effective factors on the engineering behavior of clay soils like pH.
In the most of available research, experiments have been conducted by adding acidic or alkaline agents to the soil-water mixture and adjusting its pH whereas it seems that the pH would have some variations by the time. Therefore, the effects of the changes of the initial pH of the soil are neglected in the previous studies. In this study the effect of the initial pH of the pore fluid of the kaolinite on its microstructural and consolidation characteristics have been investigated in the laboratory.

Keywords

References

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Journal of Civil and Environmental Engineering
Volume 51.3, Issue 104 - Serial Number 104
Autumn 2021
October 2021
Pages 77-85

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