Abstract
Abstract: When the soil is not suitable, the best solution for engineers is stabilization operations, because it saves a lot of time and millions of moneys compared to the method of removing and replacing unstable soil. It ensures good stability of the soil so that it can support the load of the superstructure effectively. Sand stabilization is one of the main challenges faced by those working in the field of construction and engineering projects. With the rapid technological progress, many modern technologies have emerged that facilitate and improve the installation process and provide final solutions to soil problems.One of these challenges is eliminating the phenomenon of desertification to get rid of the threats and damage caused by the movement of sand dunes to industrial buildings, agricultural crops, and some residential neighborhoods and villages in the desert, as one of the solutions to areas threatened by desertification. It is one of the goals of studying this type of soil. Stabilization of sand and soil is done by chemical or mechanical means in order to enhance the geotechnical properties of the soil, thus increasing the bearing capacity of the soil, protecting it from weathering processes, reducing soil permeability and soil mass compression, and increasing shear strength. This practical study includes studying some of the properties of sandy soil treated using cheap local materials, namely hydrated lime in different proportions (2%, 4%, 8%) and mixing it with water. These proportions were chosen based on similar studies of other types of soil available in literature because it gave good results and was between 2 and 10%.The study included a number of tests. The results showed that the maximum dry density of the soil increased from 1.662 g/cm3 to 1.696 g/cm3 and the optimum water content decreased from 15.2%⁰to 12.3% with increasing lime content. It is noted that the California bearing Ratio increases with increasing lime content from 8.252% to 41.264%. The soil also showed a noticeable improvement in the angle of internal friction of the soil from 29.2° to 37.23° and the cohesion of the soil from 0 kPa to 28 kPa for soil treated with lime. While adding lime did not lead to a significant change in the specific gravity. The best percentage that could be used of hydrated lime was 8% for the purposes of stabilizing the selected SP soil for treatment time 24 hours.