The Asphalt Of Carpet Of Mix Design Performance And Evaluation

At present,the early construction of the highway appeared more rutted road conditions and severe damage,which is both a technical level by the time limit,and also factors in the current economic development and so on.Urban roads,especially in big cities such as Beijing and Shanghai,the city’s roads,because a large number of daily vehicle also appeared damaged roads and so on.Whether it is the destruction of highways and urban roads,the means currently used in micro-surfacing,thin overlay and other conservation techniques,serious sections of the old road reconstruction.However,since these techniques belong to the construction site,to be occupied by a lot of time,the need for lengthy traffic control,will result in a large area of traffic congestion,resulting in adverse social impact on people’s travel.So,prefabrication road pavement is a future direction of development,it is the use of prefabricated factory production,transportation and curled a construction site placement asphalt pavement.In this paper,the development of exclusive prefabricated asphalt pavement carpet did some research.Through the current classification of several modified asphalt,bitumen compared the performance of the three indicators,choose a suitable modified asphalt carpet exclusive asphalt pavement.Rheological properties of combined asphalt including dynamic shear rheological test and BBR tests found contrast,SBS modified bitumen system has good high temperature performance,and then developed a high content of SBS modified asphalt,to meet the carpet Road Faced with the requirement of asphalt.Finally,some of the recommended target range on the carpet of asphalt pavement performance requirements.This paper explores research design carpet pavement grading in dense distribution of basic open-graded and open graded on uniform design developed with coarse carpet type,based on the stress-absorbing layer and the RHA graded on deployment of a carpet fine gradation type.On the basis of graded study on the combination of Marshall method,proposed some recommended target range carpeting the asphalt mixture.This article will develop a coarse carpet type and fine type asphalt and AC-13 with dense asphalt and using SBS modified asphalt carpet thickness asphalt mixture performance comparison verification,the developed proprietary asphalt carpet(Chongqing viscous bitumen)have a stronger high viscosity elastic energy,excellent high temperature performance;asphalt carpet can meet the specification,and has good high temperature performance.SPT tests were carried out by the dynamic modulus comparative study of a variety of asphalt and asphalt carpet and comparative study of repeated load permanent deformation.This paper studied interlayer adhesion strength to the road surface and the contact surface of the carpet layer has a good bonding effect.Use the hot asphalt and epoxy two materials as a bonding material,through comparative study found that the epoxy adhesive is better,but the cost is high,normal,low cost hot asphalt,bond performance in general,and to determine their own Best bond amount.Finally,this paper studied the construction process of the carpet surface,obtained asphalt mixture mixing temperature range of the amount of asphalt aggregate and asphalt mixing temperature,rolling temperature and rolled several times and so on。...