In view of the serious bituminous pavement diseases such as transverse and longitudinal cracks caused by heavy traffic in Yunshi Expressway,the overlay technology is adopted to optimize treatment.After cleaning up the original disease surface,optimize the material selection of the pavement structural layer:AC-25C Tarmac for the lower layer and AC-20C Tarmac for the middle layer,a SMA-13 modified stone mastic asphalt mixture is used for the upper layer.This improvement has effectively enhanced the bearing ca-pacity and durability of asphalt pavement.After the paving is finished,the smoothness and compactness of the pavement can be ensured through the strict primary and secondary pressing process.After treatment,the performance index PQI of asphalt pavement of express-way has been raised to above 90.
关键词
高速公路/沥青路面/病害处治/加铺罩面
Key words
expressway/asphalt pavement/disease treatment/add a finishing layer
维普
万方数据