| 摘要 |
<p>PCT No. PCT/N086/00079 Sec. 371 Date Sep. 11, 1987 Sec. 102(e) Date Sep. 11, 1987 PCT Filed Nov. 26, 1986 PCT Pub. No. WO87/03317 PCT Pub. Date Jun. 4, 1987.A method and an apparatus for mixing gravel materials and bitumen. The gravel material is mixed with a bitumen emulsion by causing the gravel material to fall onto an inclined screen (12) separating coarse gravel particles (G) from fine gravel particles (g) in such a manner that the coarse gravel particles and fine gravel particles follow different paths of free fall while spraying bitumen separately onto the two gravel follows which then are reunited via oppositely inclined baffles (20, 22). Preferably the reunited bituminous gravel material is then sprayed with additional bitumen and then allowed to fall freely onto further baffles (26, 28).</p> |
