| 摘要 |
The bituminous emulsion is prepared by stirring in a dispersion reactor as follows: preparing a bitumen phase by heating a bitumen of high viscosity to a temperature of 170°C -185°C; optionally adding rubber powder from tyres from 1% to 15% by weight of the total weight of the bitumen phase; stirring into the reactor both components and, optionally, adding an stabilising agent, followed by stirring and cooling to a temperature of 100°C-110°C; preparing a soapy phase by mixing a cationic asphaltic emulsifier at a temperature of 25°C-45°C, water at a temperature of 25°C-65°C and an emulsifier activating agent; and mixing into the reactor the bitumen phase with the soapy phase, and adding water until the ratio of the bitumen phase/water phase is between 60/40 and 90/10, followed by stirring to obtain the bituminous emulsion optionally modified with rubber powder. The invention also refers to a composite material wherein the bituminous emulsion is used as a hydrocarbon binder, and wherein said composite material is useful for paving of surfaces at a temperature of less than 100°C. |
