Critical appraisal on pavement performance of early-strength irrigated semi-flexible pavement

摘要

Early-strength irrigated semi-flexible pavement (EISFP) is a new type of composition pavement with the characteristics of both asphalt pavement and cement concrete pavement. It has the advantages of high strength in the beginning and fast strength growth. EISPF-13 Marshall specimens with voids of 20%, 25% and 30% of base asphalt mixture were formed respectively. Rutting test, low temperature trabecular bending test and immersion Marshall test were used to evaluate the high temperature performance, low temperature performance and water damage resistance of EISPF-13 maintained for 3 hours and 28 days. The test results show that the pavement performance of EISPF-13 with 3-hour maintenance has reached more than 70% of that which have been maintained for 28 days. Moreover, the dynamic stability, residual stability of EISPF-13 maintained for 3-hour are better than SMA-13 asphalt mixture. Low temperature crack resistance of EISPF-13 is slightly poor, but it can still meet the technical requirements. Considering its comprehensive road performance, it is suggested that EISPF can be used for the road maintenance with high traffic pressure, because it can withstand traffic loads after 3-hour maintenance.