Research On The Application Of Rubber Asphalt Crushed Stone Stress Absorbing Layer In Pavement Maintenance

With the rapid development of China’s economy, the popularization of automobiles is increasing year by year, a large number of discarded tires, not only cause the safety hazards but also affect the ecological environment. How to make use of the waste tire, so that it can reduce the environmental pollution and exert its own maximum efficiency, many countries have devoted a lot of manpower and material resources. With the increase of traffic volume, over weight and over weight, the effect of the factors such as traffic, the asphalt concrete pavement in our country is in maintenance period. Rut, crack, in the package has become the main form of early damage of asphalt pavement. Rutting resistance and crack resistance of asphalt pavement have become the hot and difficult problems in the field of asphalt pavement engineering at home and abroad. Rubber asphalt can be combined with the early damage of asphalt pavement in China. Application of rubber asphalt in our country, provincial highway reconstruction, repair is the research topic of this article.In this paper, the research background and the purpose of the subject, the rubber asphalt pavement performance of comprehensive theoretical research. According to the 2011 in Linyi City, national and provincial engineering S352 Tan Xue line repair repair concrete project example, designed in line with the practical engineering of rubber asphalt macadam seal coat mix and spreading amount of specific data. According to the design data to implement the construction of rubber asphalt macadam seal coat, through the test data after the completion of the construction of the study analysis, determine the rubber asphalt macadam should be crushed stone seal coat of the technical indicators are able to meet the requirements, showing rubber asphalt macadam seal good road performance, summarize a set of practical application of rubber asphalt macadam seal coat construction scheme and quality control points.Conclusions through the study:rubber asphalt has very large penetration, softening point, elastic recovery performance and high and low temperature performance compared 70# ordinary hot asphalt has a lot of advantages, the shear strength, tensile strength were better than SBS modified of asphalt and 70# hot asphalt; asphalt rubber has excellent high temperature anti rutting, low temperature crack resistance and water stability and anti fatigue performance is also very prominent. The main parameters in the design of rubber asphalt macadam seal coat as:Gravel particle size of 9.5mm-13.2mm; optimum asphalt spraying volume is 2.2 kg/m2; best macadam spreading amount for 14kg/m2.In the end, a brief discussion is made on the research direction of the next step.