Dear Rasol,
There has been a continuous effort of recycling disposed tire wastes for geotechnical applications. For example, some studies show that by mixing a certain amount of shredded rubber/ tires with natural soils, the stiffness and strength of the geomaterials will be improved at an amount that is determined by a variety of processing factors. However, there's relatively few established and systematically documented cases.
I did some test on recycled soils and still very interested in introducing shredded rubber/tires into geotechnical engineering. Anyway, you can also check reference from geotechnical journals, like ASCE geotechnical and geoenvironmental, Geotechnique, Canadian geotechnical journal, etc.
Regards,