The population growth leads to an increase of transportation means, which is translated to an enlargement of scrap tires. Millions of scrap tires from around the world every year have been received. Hence, many environmental problems such as the potential of seri-ous fires may occurs. As well, the high cost of scrap tires dispose causes headache to municipals. Therefore, it is necessary to provide some solutions to this issue. Recycling this waste to be used as a sustainable material to improve the soil properties in construction projects such as building roads, retaining walls, and drainage sys-tems is an ideal solution. The main aim of current study is to com-pare the mechanical behavior of sandy soil mixed with rubber waste obtained from scrap tires in two forms: Fine Rubber (FR) and Coarse Rubber (CR). Tests were conducted with different rubber contents (0%, 5%, 10%). A noticeable change in soil properties was obtained after adding rubber to it. The percentage of 5% of coarse rubber is the percentage that has the best effect on the properties of the soil.