Research On Performance And Application Of Waste Rubber And Plastic Alloy Modified Asphalt Mixture

In recent years, with the traffic and overloading traffic increase, there are initial failures in varying degrees such as rutting, cracks and potholes in asphalt pavement at the early part of the official opening of traffic, not only driving comfort and safety have been affected, while may also lead to huge economic losses. Development of road traffic on the use of performance asphalt pavement made increasing demands, which makes ordinary asphalt asphalt pavement can not meet the performance requirements of the asphalt pavement performance, the application of modified asphalt become the inevitable developing trend of asphalt mixture.In view of the frequent occurrence of ruttings, cracks and potholes and waste rubber, plastic pollution is increasingly serious, Road Engineering Laboratory, Shandong Jianzhu University studied the rubber-plastic modified asphalt technology and made alloy modifier from scrap rubber and plastic by using a special process and successfully prepared alloy scrap rubber modified asphalt has good road performance, but on the asphalt in the mixture applied research has not been carried out. To further study the alloy scrap rubber modified asphalt in the asphalt mix materials and the actual project, this article designed asphalt mixture for A, B, C-type rubber modified asphalt (modifier rubber ratio was5:5,6:4,7:3), then mixture properties, mechanical properties, and practical applications of the research, and, in order to further understand the waste rubber modified alloy modifiers results and prospects, the choice is currently the most widely used and excellent engineering modification effect of SBS modified asphalt and rubber modified asphalt comparative study. The main contents are as follows:First, the evaluation of pavement performance for waste rubber and plastic alloy modified asphalt (7:3,6:4,5:5), rubber modified asphalt and SBS modified asphalt were carried out under conventional index and SHRP index system asphalt testing.Next, operate the design of mix proportion of modified asphalt mixtures for AC-13, SMA-13structure composed of two representative mixture, and then the experiment research on pavement performances were carried out. Then, modified asphalt mixture dynamic modulus tests and repeated load creep tests were carried out by the use of asphalt basic performance test systems (SPT). Draw the dynamic modulus and phase angle master curve based on time-temperature equivalence principle, analyzes the correlation between the number of mobile asphalt and dynamic stability.Finally, combined laboratory study results with practical engineering of waste rubber modified alloy technology application, put forward the corresponding control at each stage of the construction standards.Studies showed that rubber and plastic modified asphalt has good road performance, and rubber modified asphalt mixture’s high temperature performance is better than SBS and rubber modified asphalt mixture, with the increase in plastics modifier component, mixture’s high temperature performance improved significantly; the rubber and plastic modified asphalt mixture’s low temperature cracking resistance is quite with SBS and rubber modified asphalt quite, but with high content of plastic components modifiers, rubber and plastic modified asphalt mixture’s performance at low temperature is lower; rubber and plastic modified asphalt mixture water stability is significantly better than the SBS and rubber modified asphalt mixture; mechanical test analysis verified the performance advantages of rubber and plastic modified asphalt mixture; engineering application also indicates that the rubber and plastic modified asphalt has good use effect.Results of this study to solve the pollution problems of waste rubber, plastics, rubber modified asphalt guiding engineering applications, thereby improving performance of asphalt pavement, extend the life of asphalt pavement with theoretical and practical significance.