| 摘要 |
FIELD: manufacture of road building materials. ^ SUBSTANCE: process comprises compounding commercial bitumen (92.5-97.5%) with petroleum processing product (2.5-7.5%), in particular bitumen converter, which is preliminarily obtained in the form of straight-run petroleum fraction from heavy low-paraffin naphthenic-base petroleum with kinematic viscosity 65-85 cSt at 50°C. Commercial bitumen is characterized by penetration at least 68 (25°C) and stretchability above 150 cm at 25°C. ^ EFFECT: improved performance characteristics of product and simplified manufacture technology. ^ 4 tbl, 4 ex |
