The Bacherol thesis is focused on the use of  waste building materials to subgrade of the pavement. Examines in detail advantages and disadvantages of this recycled material. Mainly deal with negative properities like water absorption and frost action, and figure out the dependance on the amount of brick parts in waste buildingng material. It practically verifies California bearing ratio, water absorption and rate of frost action of waste building material. A decisive impact on results will have a number of brick parts in recycled material.