Pavement subgrade stabilization using oil shale solid wastes.

摘要

Moisture-density relationships, unconfined compressive strengths, wet-dry and freeze-thaw durability of soil-spent shale mixtures were evaluated. Preliminary tests were carried out on two natural soils and one blended aggregate mixed with five different kinds of spent shale.;Detailed testing was done on a fine-grained (A-7-6) soil stabilized with western oil shale solid waste. A pavement demonstration project, to be built in Colorado, was designed using shale-stabilized soil as a subgrade. Design recommendations are made regarding the use of spent shale as a subgrade stabilizer. Recommendations for future research on the use of oil shale are presented.