MODIFIED BITUMEN FOR CONSTRUCTION AND METHOD FOR ITS OBTAINING Russian patent published in 2024 - IPC C04B24/36 C08L95/00 

FIELD: building materials.

SUBSTANCE: invention can be used to improve the physical and mechanical characteristics of road surfaces, roofing, and insulation materials based on petroleum road bitumen. A modified bitumen for construction is described, containing petroleum road bitumen, a plasticizer, a modifying additive, a plastic modifier with the following ratio of components to the mass of modified bitumen, wt.%: petroleum road bitumen 30 - 80, plasticizer 1 - 30, modifying additive 0.1 - 1, plastic modifier 5 - 40. In this case, a combination of a plastic activated rubber-containing composition and a polymer-modifier is used as a plastic modifier, and the plastic activated rubber-containing composition contains an extruded mixture of crumb rubber, an accelerating agent, and a plasticizer. Also described is a method for producing modified bitumen for construction containing petroleum road bitumen, a plasticizer, a modifying additive, a plastic modifier consisting of a polymer modifier and a plastic activated rubber-containing composition containing crumb rubber, an accelerating agent, a plasticizer, according to which the petroleum road bitumen is heated during the stirring process; a plasticizer and a modifying additive are added to the heated petroleum road bitumen during the mixing process; a plastic modifier consisting of a polymer modifier and a plastic activated rubber-containing composition are added to the mixture, wherein said rubber-containing composition is produced by joint extrusion of crumb rubber, an accelerating agent and a plasticizer; cavitation treatment of a mixture of petroleum road bitumen, plasticizer, modifying additive, and plastic modifier is carried out.

EFFECT: increase in the temperature range in which the modified bitumen has elastoplastic properties.

21 cl, 4 tbl, 9 ex