Protecting the bed soils of foundations from damaging wetting by acids

Isaev, B. N.; Tsapkova, N. N.; Badeev, S. Yu.; Balatskii, V. B.

doi:10.1007/bf02336274

Cited by 6 publications

(4 citation statements)

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“…In addition, refs. [ 3 , 4 , 5 , 6 , 7 ] have examined the impact of inorganic acid on various soil qualities. According to all of these researchers, the leakage of inorganic acids leads to soil contamination; this contamination can cause significant changes to the soil’s engineering properties, such as its design tolerance, compressibility, and strength, resulting in construction problems for facilities built on such soil.…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [ 4 ] suggested treating factory foundation soil contaminated with phosphoric acid; they recommended washing soils with water to mitigate the mineralization of acid-containing rocks and safeguard the foundation soils against acidic substances. A laboratory study was conducted on field specimens that had undergone sulfuric acid percolation and found that ground injection with sodium silicate was the best option to remediate the contaminated specimens, according to Al-Khailany et al [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

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

2023

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2023

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“…Izbash et al (1989) reported that dissolution of carbonates in soils with subsequent formation of crystallohydrated phosphoric acid salts with the liberation of CO 2 in the acidic environment lead to heaving of carbonate soils and proposed to use silicate-injection method to counter the swelling problem. Isaev et al (1995) suggested washing soils with water to reduce the mineralization of the acid-containing rocks and to protect the foundation soils from acids. Al-Omari et al (2007) recommended chemical grouting using a two-shot injection of sodium silicate and calcium chloride to overcome the cyclic heave and settlement problem due to contamination of limestone foundation with acids.…”

Section: Introductionmentioning

confidence: 99%

Volume Change Behavior of Phosphogypsum Treated Clayey Soils Contaminated With Inorganic Acids – A Micro Level Study

Chavali

Reddy

2018

Journal of Environmental Engineering and Landscape Management

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Soils exhibit undesirable volume changes when exposed to high concentrations of acids, which is manifested most frequently in the beds of foundations of industrial establishments associated with their production or use. However, control of this phenomenon has received less attention than it deserves. This paper aims to investigate the mineralogical and micro-structural changes occurred during the volume change behavior of phosphogypsum treated clayey soils contaminated with sulfuric acid and phosphoric acid solutions. Oedometer test results showed high swelling and low compressibility for acid contaminated soils than that of water. The change in microstructure towards flocculated fabric along with mineralogical transformations are responsible for the volume changes in soils. The mineralogical changes that affected the volume change behavior are discussed with FT-IR, XRD and SEM analysis. Phosphogypsum treatment was found to be effective in controlling volume changes in soils with phosphoric acid, whereas in the case of sulfuric acid found to be futile.

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“…They suggested that water insulating layers of impermeable durable materials, resistant to chemical reagents, must be placed during the installation of floors. Isaev et al [3] studied the raising of a number of columns by 340-520 mm during operation of a plant. They studied the properties of soil after exposure to thermo phosphoric acid and found that swelling occurred due to leakage which led to wetting of the soil underlying the foundations with concentrated phosphoric acid.…”

Section: Introductionmentioning

confidence: 99%