Response of High Swelling Montmorillonite Clays with Aqueous Polymer

Author:

Panda Guru Prasad1,Bahrami Alireza2ORCID,Nagaraju T. Vamsi3ORCID,Isleem Haytham F.4

Affiliation:

1. Department of Material Science and Engineering, University of Houston, Houston, TX 77204, USA

2. Department of Building Engineering, Energy Systems and Sustainability Science, Faculty of Engineering and Sustainable Development, University of Gävle, 801 76 Gävle, Sweden

3. Department of Civil Engineering, SRKR Engineering College, Bhimavaram 534204, India

4. Department of Construction Management, Qujing Normal University, Qujing 655011, China

Abstract

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 clays 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.

Publisher

MDPI AG

Subject

Geology,Geotechnical Engineering and Engineering Geology

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