Method and an apparatus for mixing gravel and bitumen

Details Method and an apparatus for mixing gravel and bitumen Method and an apparatus for mixing gravel and bitumen

B - Operations, Transporting

01

F

259/22

B01F 3/14 (2006.01) E01C 19/10 (2006.01)

Patent

CA 1281710

A B S T R A C T : A method and an apparatus for mixing gravel materials and bitumen. The gravel material is mixed with a bitumen emulsion by causing the gravel mate- rial to fall onto an inclined screen (12) separating coarse gravel particles (G) from fine gravel partic- les (g) in such a manner that the coarse gravel par- ticles and fine gravel particles follow different paths of free fall while spraying bitumen separately onto the two gravel flows which then are reunited via oppositely inclined baffles (20, 22). Prefer- ably the reunited bituminuous gravel material is then sprayed with additional bitumen and then allowed to fall freely onto further baffles (26, 28).

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