| 摘要 |
A method of producing a bituminous foam includes supplying a bitumen in water emulsion from a tank (2) into primary and secondary heating circuits (8, 34), whereby the emulsion is heated (via heating coils 12 and 12') and its pressure raised such that, on discharge to ambient conditions via outlet pipes (30 or 30'), the emulsion foams as water evaporates therefrom.
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