Investigation of the de formability of gypsofied soils by a static load

Petrukhin, V. P.; Boldyrev, G

doi:10.1007/bf02132796

Cited by 17 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When dry, gypsum ofers an apparent cementation, but water infltration causes breakdown and softening of the soil, which can lead to partial or full collapse of buildings [6]. Temperature, the amount of water in contact with the gypsum substrates, applied pressure, water velocity, and grain size are all natural elements that might infuence gypsum dissolving [7,8]. Long-term dissolution is a major regulating element in modifying the geotechnical parameters of gypseous soils.…”

Section: Introductionmentioning

confidence: 99%

Collapsibility of Gypseous Soil Treated with Pectin-Biopolymer through Leaching

Hussein

Muhauwiss

Abdul-Jabbar

2023

Journal of Engineering

View full text Add to dashboard Cite

Gypsum reinforcement in dry soil provides activity resistance. It quickly becomes a source of danger in the conditions of partial and complete soaking of gypsum soil as a result of the dissolution of gypsum, which poses a great danger to the structures built on this soil. The danger increases when water flows through it and works to leach the soil, which leads to the loss of its mass by leaching gypsum. The soil is chemically and mechanically improved to enhance its geotechnical properties, but despite its great advantages in strengthening, it has significant negative effects on the ecosystem, so the use of environmentally friendly materials is essential. Pectin was selected as an improved biopolymer and added at three different contents (0.5, 1, and 2)% to create a soil mixture and at four different gypsum contents (10, 20, 40, and 62%) to evaluate the chemical and mechanical properties of the improved mixture. Develop an engineering model to leach the soil and pectin mixture. The results showed a significant decrease in CH and CP. values due to biogel encapsulation of soil particles and pore filling properties. The percentage decrease in the values of (CH) reaches (0.67, 73, 75, and 68%) for soils 1, 2, 3, and 4, respectively. After soil (1, 2, 3, and 4), CP values decreased in percent (0.63, 0.63, 0.65, and 0.7%). TDS decreased at a biopolymer content of 2% from 1050, 1200, 2200, and 2500 mg/ml to 320, 540, 468, and 570 mg/ml of soils 1, 2, 3, and 4, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Collapsibility of Gypseous Soil Treated with Pectin-Biopolymer through Leaching

Hussein

Muhauwiss

Abdul-Jabbar

2023

Journal of Engineering

View full text Add to dashboard Cite

show abstract

“…For a reliable design of gypsum soil based it is essential to have a better understanding of their physicomechanical properties and the changes in these properties. Several factors can impact the dissolution of gypsum soils, including temperature, pressure, water velocity, grain size, and the amount of water in contact with the gypseous soils [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Acidic on the Physicochemical Properties and Collapse Potential of Gypseous Soils: Experimental Investigations

Rahil

2023

GEOMATE

View full text Add to dashboard Cite

The gypseous soils present a challenge when utilizing them as a foundation for structures, making them a problematic soil type. However, when gypseous soils are saturated by anticipated sources such as acidic results from sewerage of industry, the minerals are soluble, resulting in the subsidence of the structures. The study aims to provide valuable insights into the behavior of gypseous soils, which are known for their tendency to collapse and settle. It considered the impact of acidity on the potential for the collapse of gypseous soils, a crucial area of research that can benefit multiple fields. To comprehend the mechanisms governing the behavior of acidic gypseous soils, an investigation in the lab is carried out to determine how the presence of acidity in varying concentrations affects the possibility of the collapse of gypsum soils. To examine the impact of acidity on the chemical composition of gypseous soils, a Scanning Electron Microscope (SEM) analysis was conducted. The results of the analysis were used to create a map of this effect. In addition, the effect of different parameters such as unit weight and initial water content of gypseous soils and their effect on the collapse potential is studied. The results indicate that gypsum dissolves due to a change in the chemical composition of the soil, resulting in an increase in the collapse potential of gypseous soils. Consequently, the concepts of gypsum soil treatment must take into consideration the nature of the facilities constructed on this type of soil, such as industrial structures.

show abstract

“…Construction projects on gypseous soils have a long history of settlement issues, including but not limited to buildings, roads, bridges, waterways, ports, and railways. Loss of cementation between particles of soil happens due to the breakdown of gypsum when the water table or rainfall changes and/or infiltrates into gypseous soils [7]. There are several techniques for treating gypseous soil, including soil replacement, injection, and the use of additives.…”

Section: Introductionmentioning

confidence: 99%

Geotechnical Behaviour of Gypseous Soil Treated by Geopolymer Additives

Mahmood,

Hussein Hamed,

Ibrahim

2023

DJES

View full text Add to dashboard Cite

Gypseous soil is well-known for its numerous engineering problems. When this soil is exposed to water, the gypsum in the soil dissolves, causing the buildings built on it to collapse; so, treating gypseous soil is important for improving its engineering characteristics. The present paper focuses on studying the effect of adding geopolymer on mechanical characteristics of gypseous soil. This study presents the results obtained from a series of experimental tests, including direct shear, consolidation, and collapsibility tests. Tests were conducted on samples of gypseous soil taken from depth 1.5 meters below ground level with gypsum content of 41%. The geopolymer was used in three different molarities for the collapse test (10M, 12M, and 14M) and a 14 molarity only for the shear and consolidation tests, where equal proportions of fly ash were combined with an alkaline activator that was composed of sodium hydroxide and sodium silicate. The binder (fly ash + alkaline) to the soil was added to the treated samples during mixing at a rate of 20% by weight. The findings showed that treating the soil with geopolymer leads to a notable enhancement in the angle of internal friction of the soil particles from (37 to 42) degrees. as well as a reduction in the soil compressibility and a reduction in the susceptibility of the soil to collapse, with an improvement degree of 64% when using a geopolymer with a molarity of 14 M. This improvement was achieved by using a geopolymer with a higher concentration of NaOH. The best results were achieved when a geopolymer with a molarity of 14 was used, which is the ideal ratio.

show abstract

Investigation of the de formability of gypsofied soils by a static load

Cited by 17 publications

References 1 publication

Collapsibility of Gypseous Soil Treated with Pectin-Biopolymer through Leaching

Collapsibility of Gypseous Soil Treated with Pectin-Biopolymer through Leaching

Effect of Acidic on the Physicochemical Properties and Collapse Potential of Gypseous Soils: Experimental Investigations

Geotechnical Behaviour of Gypseous Soil Treated by Geopolymer Additives

Contact Info

Product

Resources

About