The influence of scrap plastic drinking bottles on the strength and swelling qualities lean clay is investigated in this paper. Before use, waste (WPB) were cut into 4 mm strips mixed with soil proportions 1, 2, 3, 4, 5% (dry weight soil). prepared materials subjected to three standard tests: Proctor test, swelling, penetration test California Bering Ratio (CBR). results tests revealed that WPB...