Enhancement of the Acid Resistance of Silty Clay Using Nano-Magnesium Oxide

Abstract

Hydrochloric acid is prevalent in numerous industries; leakage of this acid may cause persistent problems in the soil. The study aims to prevent any adverse impact of acid on the strength characteristics of silty clay soil by modifying the soil’s acid resistance. In this study, unconfined compression tests are performed to investigate the strength of contaminated silty clay soil with concentrations of 4%, 8%, and 12% of HCl solution and the strength of treated soil with 0.4%, 0.5%, 0.6%, and 0.8% of nano-magnesium oxide. In addition, the strength of the soil enhanced with nano-MgO contaminated with different concentrations of hydrochloric acid was investigated to assess the effect of nano-MgO on modifying the acid resistance of clay soil. Moreover, the FE-SEM test was performed to analyze the microstructure of the soil under different circumstances. Based on the results, the strength of clay soil decreased due to contamination with the hydrochloric acid solutions; the reduction in strength was more noticeable when the acid solution became more acidic. Adding 0.6% of nano-magnesium oxide enhances the strength by about 114%. Findings show that adding 0.6% nano-MgO to the soil before exposing it to hydrochloric acid can enhance its acid resistance; the strength of the treated soil with nano-MgO was better at resisting the acid than the untreated soil.

Thermal Conductivity and Shear Strength in Root-Reinforced Silty Clay: An Analysis of Asteraceae Plants from Taihang Mountain

“…Silty clay, a soil type characterised by low thermal conductivity and pronounced rheology, is extensively utilised in diverse sectors, encompassing civil and environmental engineering to underground energy storage [1,2]. Its favoured status in foundational constructs, subterranean tunnels, and soil barriers underscores its pivotal role [1,2].…”

“…Silty clay, a soil type characterised by low thermal conductivity and pronounced rheology, is extensively utilised in diverse sectors, encompassing civil and environmental engineering to underground energy storage [1,2]. Its favoured status in foundational constructs, subterranean tunnels, and soil barriers underscores its pivotal role [1,2]. However, the intricate internal structure and variegated pore distribution have rendered the accurate prediction of its thermal conductivity and thermal stress behaviour formidable [3][4][5][6].…”

Experimental Study on the Bearing Capacity of Gas Oil-Contaminated Coastal Sand

“…In the last decades, a number of reduced-scale physical modeling [7][8][9][10][11], laboratory element testing [1,2,[12][13][14][15][16][17][18][19][20][21], and field testing [22] studies have been conducted to study the variations in the mechanical properties of soils contaminated with different types of contaminants. Al-Sanad et al [2] conducted one of the first comprehensive laboratory studies on oil-contaminated soils using Kuwaiti Jahara sand samples.…”