Investigation of Acid Effect on the strength behavior of Fine-Grained soil

Document Type : Original Article

Authors

1 PhD student. semnan university

2 Iran, semnan,semnan university , professor of department of civil engineering

3 Faculty of Civil Engineering, Semnan University, Semnan, IRAN.

10.22091/cer.2023.9393.1479

Abstract

Due to the ever-increasing growth of fossil pollution in the air of big cities or any other place, the resulting rain will be acidic. The reason for the formation of acid rain particles is nitrogen group compounds. That is, the combination of existing water with nitrate causes the phenomenon of acid rain. The soil may be exposed to various pollutants over time, including acidic pollutants and its shear resistance changes.Therefore, this issue is investigated in this research. On the other hand, investigating the behavior of soil under the effect of acidic contamination is so important because the excessive using of the sand-bentonite mixture in the Landfills. According to this subject in this research Sand of Firoozkooh with different percentages (0, 10%) Bentonite to carry out the undrained consolidated triaxial tests is use to investigate the effect of nitrat acid solution with (1,3)pH for investigating the influence of acidic contamination on shear strength parameter. Results that comes out from experiments indicates that Presence of acid lead to reduction of shear strength of clean sand. Although in sand-bentonie mixture with pH=3 shear strength increased but rising of acid in pH=1 lead to decrease of shear strength. Also presence of acid make the positive pore pressure higher.

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Civil Infrastructure Researches

Articles in Press, Accepted Manuscript
Available Online from 15 October 2023

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