This paper makes use of 3D finite element analysis to calculate the structure of perpetual semi-rigid base asphalt concrete pavements,and gets the conclusion that,to meet the requirements of perpetual pavements,perpetual semi-rigid base asphalt concrete pavements must have thicker asphalt overlay.

Based on experiment of per actual project of maintaining a certain highway with micro-surfacing construction technology in the northern areas of China,this paper analyses the factors such as material testing,mixture quality,construction quality and final quality inspection.The research proves that micro-surfacing construction technology is of superiority in road-maintaining.