BITUMEN-SANDY MASTIC FOR COVER THIN LAYERS Russian patent published in 2002 - IPC

FIELD: building industry, road way repairing. SUBSTANCE: bitumen-sandy mastic for thin layers of covers comprises the following components, wt.-%: crushed stone sifting of fraction 0-5 mm as mineral filling agent, 53.4-65.6; mineral powder, 12.0-18.0; rubber thermoelastoplastic as polymeric granulated addition, 0.4- 0.6; petroleum viscous bitumen as binding agent, 8.0-12.0 and spent molding mixture of foundry manufacture, 14.0-16.0. Invention can be used for making thin layers of covers in all climatic zones. Invention provides enhancement of strength indices and waterproof coefficient of mixture obtained, utilization of spent molding mixtures of foundry manufacture. EFFECT: improved quality and properties of mastic. 3 tbl, 1 ex