Emulsions stabilized by asphaltene-polyacrylamide-soil three-phase components: Stabilization mechanism and concentration effects

Liu, Wei; Fu, Hongrui; Bao, Mutai; Luo, Cheng-yi; Han, Xiao; Zhang, Dan; Líu, Hao; Li, Yiming; Lu, Jinren

doi:10.1016/j.seppur.2022.122157

Cited by 9 publications

(4 citation statements)

References 47 publications

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“…Impact of PAM: PAM, a high molecular weight polymer, exhibits strong water-absorption capabilities [11] . Within the studied ratio range, the polymer absorbs moisture, reducing the available water for cementhydration reactions, thereby limiting hydration and reducing strength.…”

Section: Analyzing Uncon Ned Compressive Strengthmentioning

confidence: 99%

“…Therefore, the effect of PAM solution on cement stabilization is minimal, which can primarily be explained as follows: within the studied ratio range, polyacrylamide (PAM) does not promote the formation of hydration products and only mildly affects cement hydration due to its water-absorbing properties. However, it forms a viscous gel-like substance in water, which provides certain viscosity and adhesion [11] , thereby contributing to a modest increase in strength. Consequently, the material undergoes no signi cant macroscopic changes in strength.…”

Section: Experimental Parametersmentioning

confidence: 99%

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Performance Analysis of Pipe-Jacking Waste Soils Solidified with Cement under Balanced Earth Pressure Conditions

Youjun,

Zhenyu,

Zhigang

et al. 2024

Preprint

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The utilization of pipe-jacking soil poses challenges due to its complex composition, which comprises polyacrylamide (PAM) and sodium bentonite (Na-Ben) surfactants, hindering drainage and solidification. Improper handling may induce environmental pollution. To address this problem, cement solidification was explored after modification with PAM and Na-Ben. By performing indoor resistance tests, freeze–thaw cycles, wet–dry cycles, SEM, XRD, and IR experiments, it was found that within certain ratios, cement solidification effectively stabilizes pipe-jacking waste soil. Specifically, PAM minimally impacts pipe-jacking waste-soil strength, whereas Na-Ben slightly reduces it. Microscopic analysis revealed that although water absorption hinders hydration reactions, PAM (at lower concentrations) promotes mineral particle cohesion during cement solidification. Na-Ben tends to aggregate, leading to uneven internal structure and inhibiting cementitious product formation

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Section: Analyzing Uncon Ned Compressive Strengthmentioning

confidence: 99%

Section: Experimental Parametersmentioning

confidence: 99%

Performance Analysis of Pipe-Jacking Waste Soils Solidified with Cement under Balanced Earth Pressure Conditions

Youjun,

Zhenyu,

Zhigang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The addition of polymers to the soil water medium can cause the flocculation of the clay particles by triggering the appropriate clay-polymer interaction mechanisms, such as charge neutralization, van der Waals or ionic bonds, and cationic bridging for cationic, neutral, and anionic polymers, respectively [31]. Polyacrylamide appears to have a variety of beneficial soil stabilizing characteristics and hence merits more research among the myriad commercially produced and easily accessible polymeric stabilizers [32]. Polyacrylamide is the name given to a class of synthetic polymers made from acrylamide monomers; they are hydrophilic (and thus water-soluble) in nature and can be produced in anionic, neutral, or cationic forms [33].…”

Section: Introductionmentioning

confidence: 99%

“…Factors such as porosity, ionic concentration of the pore fluid, the composition of solids, degree of saturation of soil, particle shape, and orientation affect the electrical properties of soil. Many researchers have attempted to establish a correlation in electrical properties due to changes in density, moisture content, and temperature [32,33]. Resistivity is a material property independent of the media's shape.…”

Section: Introductionmentioning

confidence: 99%

Response of High Swelling Montmorillonite Clays with Aqueous Polymer

Panda

Bahrami

Nagaraju³

et al. 2023

Minerals

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Expansive clays containing mineral montmorillonite exhibit swelling and shrinkage due to variations in the moisture content, leading to significant distresses. There has been a growing interest in chemical and polymer additives treated for high swelling montmorillonite clays in recent years. However, limited attention has been paid to the effect of polyacrylamide on the soil’s swelling behavior. Moreover, nontraditional methods of the soil treatment are applied for the rapid stabilization of soil. In this article, polyacrylamide polymer is used as an additive to expansive clay to control the swelling phenomenon. Three different percentages—2.5%, 5%, and 7.5%—of polymer are blended with oven-dried soil to determine Atterberg limits, compaction features, and swelling characteristics. Additionally, electrical impedance measurement is conducted on treated soil samples with different moisture contents. The electrical resistance of soils and polymer-treated soils is measured based on the electrical resistivity correlation of soils. Tests results for soils stabilized with polyacrylamide show that swelling is significantly reduced with increasing the additive content. Moreover, the addition of polymer improves resistivity of soil. Aqueous polyacrylamide can be utilized as an effective stabilization additive to enhance properties of expansive clays.

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Preparation of water-based ink binders from acrylic-modified rosin resins

Zhang,

Hu,

et al. 2024

J Coat Technol Res

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Emulsions stabilized by asphaltene-polyacrylamide-soil three-phase components: Stabilization mechanism and concentration effects

Cited by 9 publications

References 47 publications

Performance Analysis of Pipe-Jacking Waste Soils Solidified with Cement under Balanced Earth Pressure Conditions

Performance Analysis of Pipe-Jacking Waste Soils Solidified with Cement under Balanced Earth Pressure Conditions

Response of High Swelling Montmorillonite Clays with Aqueous Polymer

Preparation of water-based ink binders from acrylic-modified rosin resins

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