ABSTRACT
Large quantities of plastic waste are released into the environment in an undesirable way, these waste causes many environmental problems. The current research presents an attempt to improve the properties of gypseous soil by using plastic. Different percentages of plastic (2%, 4% and 6%) were mixed with a soil of gypsum content of 57%. The results showed that adding (6%) of plastic leads to a reduction in the maximum dry unit weight by (21.48%), and the optimum moisture content increases by (20.68%). The angle of internal friction decreased by (17.45%) when adding (6%) plastic, and the soil cohesion decreased by (266.125%) when adding (6%) plastic . Overall, the plastic had positive effect on some geotechnical properties of soil and it can be used as admixture in soil.
