| 摘要 |
FIELD: petroleum processing. ^ SUBSTANCE: weighted goudron having conditional viscosity 60 to 200 s at 80°C is subjected to oxidation to give building goudron with softening temperature not below 90°C, which is then compounded with starting goudron to give road bitumens. ^ EFFECT: simplified bitumen manufacture process and widened bitumen application area. ^ 3 cl, 1 tbl, 6 ex |
