Asphalt-covered layers are applied to the old cement concrete pavement reconstruction domestically and overseas.However

there exist the problems of how to control the time of reflectiion crack’s occurrence and crack expansion rate.It is analyzed that asphalt covered layers to prevent reflection crack are to control crack instead of eliminating it

and it is discussed building up stress adsorbed course play a decisive role in the operation property and operation life of the asphalt-covered layers.