Collapse potential of loess soils contaminated by synthetic and landfill leachates Available to Purchase

In this research the effects of synthetic and landfill leachates on the behavior of loessial soil were investigated. Two synthetic leachate solutions were prepared in laboratory by using sulfuric acid and sodium hydroxide and landfill leachate was provided from Mashhad landfill in Iran. Collapse tests were performed according to the standard procedure of ASTM D5333. At first, collapse tests were performed in different saturation conditions including saturating with water and saturating with landfill leachate. Then, the loess soils were contaminated by synthetic and landfill leachates solutions at 5, 10 and 15% by weight of the dry soil samples. Collapse tests were performed on contaminated loess soils after 7 days of curing. The results showed that the collapse potential of soils contaminated with acidic synthetic leachate was higher than that of clean soil. On the other hand, with increasing the percentage of alkaline synthetic leachate, the rate of soil collapse decreased slightly. Landfill leachate increased the collapsibility of soil due to its acidity.