Patent ID: 6227762
Filing Date: 2001-05-08
Classification: E01C

Abstract:
A method of joining layers of asphalt comprising the steps of:placing a first layer of asphalt in a roadway:allowing said first layer of asphalt to cool to a temperature below a predetermined minimum bonding temperature;preheating a surface of a joining area of said first layer of asphalt to a temperature between the predetermined minimum bonding temperature and a predetermined danger temperature, said danger temperature being below an ignition temperature of said asphalt;allowing said joining area of said first layer of asphalt to absorb heat from said surface of said joining area of said first layer of asphalt;reheating said surface of said joining area of said first layer of asphalt such that said joining area is heated to a temperature between the predetermined minimum bonding temperature and the predetermined danger temperature; andplacing a second layer of asphalt in said roadway adjacent said first layer of asphalt such that a hot joint is formed between said first layer and said second layer.