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<p>The soil stabilizing materials commonly used for soil improvement are cement and lime. In this study, an attempted is made to identify an eco-friendly material to reduce the negative environmental effects of cement and lime. Pectin is an eco-friendly biopolymer that is a heteropolysaccharide found in citrus fruit peels. It is a gelling agent; therefore, it can increase cohesion between soil and particles. To show the effect of pectin on shear strength and compressibility, the unconsolidated undrained triaxial test, oedometer test, and microstructure analyses were conducted for untreated and pectin-treated soil at three doses of 0.5, 1, and 2% by dry weight. The results showed increased shear strength and decreased compressibility with an increase in biopolymer content and curing period. Also, the microscopic imaging showed that the structure of the clay-pectin matrix is much better compared to the natural soil in terms of reducing the size of the gaps.</p>

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Strength and Compressibility Characteristics of Clay Treated by Pectin Biopolymer

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Zubaida Saad Ali,
  • Mohammed Y. Fattah,
  • Ahmed S.A. Al-Gharbawi

摘要

The soil stabilizing materials commonly used for soil improvement are cement and lime. In this study, an attempted is made to identify an eco-friendly material to reduce the negative environmental effects of cement and lime. Pectin is an eco-friendly biopolymer that is a heteropolysaccharide found in citrus fruit peels. It is a gelling agent; therefore, it can increase cohesion between soil and particles. To show the effect of pectin on shear strength and compressibility, the unconsolidated undrained triaxial test, oedometer test, and microstructure analyses were conducted for untreated and pectin-treated soil at three doses of 0.5, 1, and 2% by dry weight. The results showed increased shear strength and decreased compressibility with an increase in biopolymer content and curing period. Also, the microscopic imaging showed that the structure of the clay-pectin matrix is much better compared to the natural soil in terms of reducing the size of the gaps.