Patent ID: 9206565
Filing Date: 2015-12-08
Classification: C10C,E01C,Y02A

Abstract:
1. A hot recycling heating method for old asphalt mixture, which achieves heating for old asphalt mixture by a gapless heat exchange environment between hot asphalt and old asphalt mixture, overcomes the problem of high aging possibility of the old asphalt mixture and the problem of environmental pollution caused by generation and emission of asphalt fume in traditional old asphalt mixture hot recycling technologies, and accomplishes reasonable utilization of old asphalt mixture resources, the method comprising the steps of: (a) mixing an old asphalt mixture at ambient temperature with hot asphalt to form a mix of the old asphalt mixture and the hot asphalt, wherein the old asphalt mixture is not heated before mixing with the hot asphalt, wherein the temperature of the hot asphalt is higher than the temperature of the old asphalt mixture, but not higher than the standard temperature of heating asphalt, the mix of the old asphalt mixture and the hot asphalt further to be heated as required during mixing to increase the temperature of the mix and the weight ratio of the old asphalt mixture to the hot asphalt in the mix, and the weight ratio of the old asphalt mixture to the hot asphalt is be 0.1:1-40:1; and (b) immersing the hot asphalt in the old asphalt mixture to soak the old asphalt mixture in the hot asphalt during mixing, wherein a part of heat in the hot asphalt is transferred to the old asphalt mixture, and heating for the old asphalt mixture being achieved by a gapless heat exchange environment between the hot asphalt and the old asphalt mixture.