Patent ID: 9127413
Filing Date: 2015-09-08
Classification: C08L,C09D,C10C,E01C,G21K,H05B

Abstract:
1. A method for repairing an asphalt pavement, comprising: passing an emitter over an aged asphalt pavement, wherein the emitter generates electromagnetic radiation having a wavelength of from 20 microns to 1 mm, the radiation penetrating into the pavement to a depth of at least 2 inches, wherein a temperature differential throughout a top two inches of pavement is 100° F. or less, wherein a highest temperature in the top two inches of pavement does not exceed 300° F., and wherein a minimum temperature in the top two inches of pavement is at least 200° F., whereby voids and interstices in the damaged pavement are disturbed without dehydrogenation of the asphalt, and whereby oligomers present in the aged asphalt are linked together into longer polymer chains, whereby ductility of the asphalt is improved; allowing the pavement to cool to below 190° F.; and applying a compacting roller to the asphalt pavement to minimize voids and surface irregularities, wherein the asphalt is at a temperature no lower than 150° F.