Design Parameters Research Of Stabilized Waste Rubber And Plastic Polymer Alloy Modified Asphalt Mixture

The highway construction of our country is heading foreword rapidly along with the development of national economy, in the meanwhile, asphalt pavement appears a different degree of early damages because of the increasingly traffic volume, which not only affected the traveling securities of our people, and also restrict the economic development process of our country. The high-speed economic development also brings in a large number of industrial and household garbage, among them the pollution and recycling utilization of waste plastic and waste rubber tire is one of the most urgent problems.Due to the present appeared pavement distress and recovery processing problems of waste materials, Shandong Jianzhu University Road Engineering Laboratory has researched stabilized waste rubber and plastic polymer alloy modified asphalt technology, and the produced asphalt and asphalt mixture has an excellent pavement performance.stabilized waste rubber and plastic polymer alloy modified asphalt technology has a very high social value and pavement performance, but at present is still lack of comprehensive research about the mixture design parameter. This paper researched the performances and mixture design parameter of the stabilized waste rubber and plastic polymer alloy modified asphalt by using the method of laboratory test, and recommend the applicative pavement structure and pavement structure layer of the stabilized waste rubber and plastic polymer alloy modified asphalt mixture through experimental data and the local pavement features.At first, we evaluate the performance of stable type waste rubber and plastic polymer alloy asphalt modifier under the conventional needle penetration staging hierarchy and SHRP PG staging hierarchy, and compare with the 1-D SBS modified asphalt.Secondly, adopt indoor experiment, research and analysis the tensile resistance, shearing resistance, dynamic modulus, fatigue performance of stabilized waste rubber and plastic polymer alloy modified asphalt mixture, divide into fine, medium and coarse grain type structure and composition respectively, and compare with the equal grading new type rubber and plastic, SBS modified asphalt and 70#-A matrix asphalt mixture, analyze the design parameter of the stabilized waste rubber and plastic polymer alloy modified asphalt mixture, combined with mathematical statistical methods recommended in the range of stabilized waste rubber and plastic polymer alloy modified asphalt mixture design parameters.Finally, summarize the research results above and the local real road features, we recommend three kinds of pavement structure, and analyze the applicative pavement structure and layer of the stabilized waste rubber and plastic polymer alloy modified asphalt mixture by set up finite element model, and checking the performance of the applicative pavement structure combine with the real road damage features and structure related specifications.The research and analysis of this paper reach the results that stabilized waste rubber and plastic polymer alloy modified asphalt mixture possess excellent high temperature performance and low temperature performance, its high and low temperature performance is fairly equal to and even have surpassed the SBS modified asphalt; the indoor experiments of design parameters illustrate that the stabilized waste rubber and plastic polymer alloy modified asphalt mixture has excellent performance, the stensile resistance of the stabilized waste rubber and plastic polymer alloy modified asphalt mixture is obviously better than the SBS modified asphalt mixture, and its shearing resistance is fairly the same to the SBS modified asphalt mixture, its dynamic modulus manifests that it has excellent high temperature performance, and low temperature performance is basically equal to the SBS modified asphalt mixture, it can also obviously increase the fatigue performance of the mixture, integrate the experiments results and proves the high temperature and low temperature performances of the stabilized waste rubber and plastic polymer alloy modified asphalt mixture is fairly equal to and even surpassed the SBS modified asphalt mixture of equal grading condition; analyze the mechanical response of typical pavement structure and pavement layer of the stabilized waste rubber and plastic polymer alloy modified asphalt mixture with the method of finite element analysis, verified its performances advantages and also manifested it has a broad application prospect.This paper are for the purpose of promoting the improvement and development of stabilized waste rubber and plastic polymer alloy modified asphalt technology, and fully reflect its tremendous social value and excellent pavement performance.