Experimental of Mechanical Effect Weakening of Acid-contaminated Red Clay in Guilin

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Experimental of Mechanical Effect Weakening of Acid-contaminated Red Clay in Guilin

Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 4

Abstract

The representative red clay in Yanshan area of Guilin was selected as the test soil sample, and hydrochloric acid was used as the acid pollutant to prepare 3 different concentrations of acid solution. The hydrochloric acid solution mass fraction and the time of red clay in acid solution immersed were taken as the influencing factors to reveal the weakening mechanism of mechanical effect of acid polluted red clay. The results show that the compressibility of acid-contaminated red clay is enhanced, the shear strength is reduced, and the cohesive force is reduced. The weakening is more obvious with the increase of acid concentration and curing time. The mechanical effect weakening of acid-contaminated red clay results from the reduction of Fe2O3 and Al2O3, the increase of SiO2 content, the dissolution and ion-exchange of CaCO3 and MgCO3.

Authors and Affiliations

Chunmei MU, Qinga FU, Yichang LIU

Keywords

acid-stained red clay; mechanical effect weakening; compressibility coefficient; shear strength;

EP ID EP553908
DOI 10.15926/j.cnki.issn1672-6871.2019.04.010
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