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Volume Title: ICASGE2023

DOI: ICASGE-GEO

Mohamed sharaf

Department of Construction & Building Eng., College of Engineering & Technology, Arab Academy for Science, Technology & Maritime Transport, Alexandria, Egypt

Swelling soils are widely distributed in various regions of the world. The behavior of this type of soils is quite complex, as they are categorized as problematic soils. Shrinkage and swelling in soils occur due to seasonal variations in climate conditions which affect the retention of water in the soils. The prediction of climate change shows that these problems may get worse in the future. Throughout the last years, this subject has caught attention which encouraged modeling, experimental and field investigations to find out a solution for this problem. Consequently, to reduce the pollution and to keep the environment sustainable and clean, waste and recycled materials has been used in the current study to improve the characteristics of the swelling soil in the lab. Therefore, the aim of this study is to observe the behavior of expansive soil when mixing bentonite with sodium chloride (NaCl) and different percentages of lime sludge (LS). The percentages used in this work was 1% NaCl with 5%,10%, 15% and 20% of LS. The experimental tests held in the laboratory were liquid limit, plastic limit, free swell, swelling pressure, swelling and infiltration test and physical models to determine the swelling properties of expansive soil. The results show that by increasing the percentage of LS and using NaCl , a significant improvement occur to the swelling properties of the soil.

Bentonite; Swelling Soil; Expansive soil; Lime sludge (LS); Sodium chloride (NaCl)

Geotechnical Engineering (GEO)