Study On Construction Technology And Technological Economy Of High-performance Semi-flexible Pavement

Semi-flexible pavement is generally described as a new composition pavement, which is filled with Portland cement grout in open-graded matrix asphalt mixture.A great deal of research had been done and taken into the application in domestic and overseas.But the research about the construction methods and the machine collocation of semi-flexible pavement is still in the start stage in our Country,the application of the pavement in road hasn't got well researched and generalized.Semi-flexible pavement behaves with more rigidity than asphalt pavement and more flexibility than cement pavement.It has both virtues of normal asphalt and cement pavement but avoids the defects of them.So,it has Practical meaning and development prospects to study its application technology.On the basis of present study in domestic and overseas,and according to the result of the supporting project,some regulations are made about the match for matrix asphalt mixture and cement mortar as well as about the materials used in the semi-flexible pavement.Referring to the construction methods of OGFC,some analysis and conclusion are made about the construction methods of matrix asphalt mixture.Then three construction methods were made:Manpower construction;Factory construction and Slurry seal coat machine construction.First of all,according to the supporting project,some elaborate introduction was made about the construction methods of cement mortar presently,and mentions its disadvantages:low efficiency,low precision and simple machinery.Then,on the foundation of current pavement machine in china,it does a complete study on the construction configuration for cement mortar construction of semi-flexible pavement.It also suggests a new construction method called slurry seal coat machine method with other machines:preparation--mixing with slurry seal coat machine-irrigating with little librating roller-cleaning abundant cement mortar with cleaning car-preservation.What's more,on the basis of the construction methods,it does some studies about the construction norm and technological economy.The reference of semi-flexible pavement construction norm and three construction methods about cement mortar are put forward,as well as the comparison of the construction between the semi-flexible pavement and the normal asphalt concrete.Then,the advantage on technological economy is apparent for semi-flexible pavement.