Treatment of swelling soil using sodium chloride and waste materials for reducing swell potential
Volume Title: ICASGE2025
Paper ID : 1161-ICASGE
Authors
Department of Construction & Building Eng., College of Engineering & Technology, Arab Academy for Science, Technology & Maritime Transport, Alexandria, Egypt
Abstract
Swelling soils are widely distributed in various regions of the world. Many arid and semi-arid regions have a problem of Swelling soil which is one of the problematic soils that face many geotechnical engineers in the field. Consequently, structures found on expansive soils are prone to being distressed and damaged. Clayey soils do not only possess the tendency to swell or increase in volume, but they are also able to shrink or decrease in volume due to seasonal variations in climate conditions which affect the retention of water in the soils. These problems may get worse due to the prediction of change in climate in the future. Consequently, to reduce pollution and to keep the environment clean and sustainable, recycled and waste materials have been used to improve the characteristics of the swelling soil in the lab. This review highlights the behavior of expansive soil when mixing swelling soil with sodium chloride (NaCl) and different percentages of lime sludge (LS) on the short term. The percentages of NaCl used in this work were 1% ,2%,3%,6%,9%,12%. Added to that, 1% of NaCl was mixed with different percentages of LS of 2%,4, 6% and 8%. The experimental tests held in the laboratory were liquid limit, plastic limit, free swell, swelling pressure and physical models to determine the swelling characteristics of swelling soil. The results show that by increasing the percentage of NaCl in addition to using LS, a significant improvement occurs to the swelling properties of the soil.
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