The main problems existing in epoxy modified asphalt are outlined,and the feasibility of polyu-rethane/epoxy composite modified asphalt is proposed by summarizing and analyzing the mechanism and performance of polyurethane toughened epoxy resin.The advantages of polyurethane/epoxy composite modifier in improving the water stability,low-temperature cracking resistance and impact toughness of as-phalt mixtures are systematically explained with a view to improving the durability and service life of ep-oxy asphalt pavements.Finally,the development trend of polyurethane/epoxy composite modified asphalt is prospected.
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