Effect of Moisture and Loading Conditions On the Volumetric Behavior of Bentonite-Sand Mixtures

Abstract

Expansive soils, known for their significant volume changes due to moisture fluctuations, present major challenges in geotechnical engineering, leading to foundation heave, settlement, and structural damage. Accurately predicting their behavior is essential yet difficult due to their high volume change potential. This study investigates the volume change behavior of laboratory-prepared bentonite-soil mixtures to improve the understanding and prediction of settlement under varying conditions. Two distinct mixtures were tested to evaluate their volume change properties under different moisture contents and applied loads through a series of compression and shrinkage tests. The results revealed that the interaction between bentonite and soil particles, combined with moisture content, plays a crucial role in determining the settlement behavior of these mixtures. This study offers valuable insights into the behavior of expansive soils, identifying key factors that influence their settlement characteristics. The findings contribute to better prediction and management of settlement in expansive soils, enhancing the design and stability of geotechnical structures. By emphasizing the importance of understanding the complex interactions between soil constituents and environmental conditions, this research provides a solid framework for addressing the challenges posed by expansive soils in geotechnical design and assessment.