| 摘要 |
A method of forming a bituminous membrane for application to a surface in order to render the surface resistant to penetration by water which comprises: providing a raw material supply of bitumen e.g. a blend of 50/200 PEN bitumen, and an aqueous blending supply of water in a pH range which is slightly alkaline; heating the bitumen and the aqueous blending supply and blending them together in a blending unit to form a blended mixture emulsion; and storing the blended mixture/emulsion in a flowable form prior to supply to a spray coating device in which a separate acidic aqueous dispersing supply is also fed to the spray coating device so that two streams of the blended mixture/emulsion and the acidic dispersing supply impinge on each other to form a dispersed spray applicable to the surface to be treated. |
