Method and apparatus for repaving asphaltic pavement

Details Method and apparatus for repaving asphaltic pavement Method and apparatus for repaving asphaltic pavement

E - Fixed Constructions

01

C

E01C 19/46 (2006.01) E01C 23/12 (2006.01)

Patent

CA 2042000

- 20 - ABSTRACT An asphaltic pavement preconditioning machine to remove and grind up old asphalt so that it can be rejuvenated. The method and apparatus heats a strip of asphalt, grinds a first strip portion and moves the ground asphalt to a second strip portion leaving behind an exposed unruptured, unsoftened layer. Both the ground material and the previously heated unground asphalt in the second strip are then ground. The exposed hard asphalt in the first strip is heated, softened and then ground and moved onto the first strip portion. The heat from the ground asphalt lying over the centre strip portion softens the unground asphalt there which is subsequently ground together with the ground material and left for further processing. At least three heating and grinding steps are effected so that the depth of asphalt requiring softening by heat is approximately 1/2 to 5/8 inches and smoke emission is substantially lower than prior methods.

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