Application of Sustainable Lignin Stabilized Expansive Soils in Highway Subgrade

Sarker, Debojit; Apu, Omar Shahrear; Kumar, Narendra; Wang, Jay X.; Lynam, Joan G.

doi:10.1061/9780784483435.033

Cited by 9 publications

(1 citation statement)

References 31 publications

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“…Inhibition of clay swelling requires materials that can prevent swelling of the interface layer and bond with the surface of layers. Aqueous polymers are best suited to coat clay particles, and several researchers have employed this technique to control dust, cracks in soil, and erosion [27][28][29][30]. Another advantage of the polymer treatment is that its adsorption onto clay is irreversible [30].…”

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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