路面,道路
2.(3)The geograph y distribution of the road γ radiation dosage is similar, i.e:the middle moun tain area in the North is highest,the low mountain area in the Southeast and the East are the second.The river valley and flat land area in the Southwest is lo west.(4)The land γ radiation dosage rate of different road pavement is in sequ ence:clay road>macadam road>brick road>tar road>cement road.
3.Pavement Management System (PMS) has played an important role in both maintenance and investment of pavements as a powerful analysis tool.
4.This paper expounds the connotations of the PPM, analyzes on the necessity of carrying out the PPM, and introduces some common methods for the PPM.
8.and Having put forward the application base course in advance saw kerf+ geotextile to guard against the split measure in project measure research, whichcan artificially controls interval of base course crack and effectively prevents thekerf expension from producing the reflection crack in asphalt surface, thus canraise the quality that the road surface is used and prolongs life-span of roadservice.
9.Paving method for preventing the frost on pavement in the urban area of Sapporo, Japan

