C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
6/161, 6/165
C08L 95/00 (2006.01)
Patent
CA 2034260
Methods and compositions are provided for rejuvenating aged asphaltic paving material, or for improving the compatibility of aged asphalt in salvaged old asphalt paving materials with other asphaltic materials, or of improving the resilience to stripping of rejuvenated asphalt and aggregates, by the use of an agent which was heretofore not known to be a rejuvenating agent. Such rejuvenating agent is a sewage sludge-derived oil, or a fraction thereof, having a particularly recited composition. This rejuvenating agent markedly lowers the viscosity of the aged asphalt, disperses the components of the aged asphaltic paving material for dispersion of such, or other added asphaltic components in the asphalt, and increases the adhesion of aged asphaltic paving material to aggregates. Such rejuvenating agent may be used together with other conventional rejuvenating agents and/or softening agents, e.g., hydrocarbon products with physical characteristics which are selected to restore aged asphalt to the requirement of current asphalt specifications, for example, soft virgin asphalts.
Clelland Floyd I.
Farnard Brian A.
Houde Jean Jr.
Sawatzky Henry
Borden Ladner Gervais Llp
Mines And Resources Canada Her Majesty The Queen In Right Of Canada As Represented By The M
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