FIELD: chemistry.
SUBSTANCE: group of inventions relates to polymer chemistry and is used in production of asphalt road surface. Method comprises grinding vulcanised rubber to obtain vulcanised crumb rubber with grain size less than 0.4 mm. Method includes mixing of vulcanised crumb rubber, SBS and lubricant inside an extruder. Weight percentage of lubricant is between 1 % and 50 % with respect to weight of mixture, and vulcanised crumb rubber is in weight percentage 70–100 % with respect to SBS weight. SBS is a polymer of linear, radial types or mixture thereof. Rubber crumb is obtained from processed tyres. Lubricant is a mineral oil. At temperature of 160–200 °C extrusion mixture is carried out to produce a compound, containing rubber crumbs, SBS and lubricating compound.
EFFECT: extruded compound is cut into chips and added to bitumen in weight ratio of 5 % and 30 % in relation to total weight of modified bitumen.
10 cl, 5 tbl
