METHOD TO PRODUCE SULPHUR BITUMEN Russian patent published in 2012 - IPC C08L95/00 C08K3/06 

FIELD: construction.

SUBSTANCE: method includes mixing melted bitumen, sulphur and an activating additive in process of heating. To activate a reaction mixture, amines are used in the amount of 0.3-3.0 wt %, in respect to sulphur. Reaction is carried out at 130-150°C for 2-3 hours. Mass ratio of sulphur and bitumen makes 20-70:30-80. The proposed method is ecologically safer, makes it possible to cheapen the target product by addition of a considerable amount of sulphur, to solve the problem of recycling sulphur being a by-product of oil production and oil processing. In process of further manufacturing of sulphur asphalt concrete, any mineral fillers may be used, included contaminated ones, this will not affect the quality of the target product. The produced sulphur concrete has higher strength, better adhesion to mineral fillers, demonstrates high frost resistance.

EFFECT: improved operational characteristics.

8 cl, 3 tbl, 21 ex