FORFARANDE FOR FRAMSTELLNING AV EN KOMPOSITION FOR VEGYTOR, BANYTOR PA FLYGPLATSER, KANALYTOR, DAMMYTOR OCH LIKNANDE YTOR, VARVID VARMT MINERALGRANULAT SNABBLANDAS MED PULVER AV EN POLYMER ELLER SAMPOLYMER ...

摘要

Process for preparing a composition for the surface of roads, airport runways, canals, dams and the like surfaces, comprising mineral granulates coated with 4-12% by weight with respect to the weight of the granulates, of a binder consisting essentially of 93-96% by weight of fluxed coal pitch or fluxed coal tar and 4-7% by weight of a polymer or copolymer of vinyl chloride. The polymer or copolymer is first mixed rapidly in a mixer in the form of a powder with the granulates previously heated to a temperature of 120 DEG -160 DEG C and the binder is thereafter introduced in the mixer in contact with the mixture thus obtained and the mixing of the composition is terminated in the conventional manner.