橡膠顆粒瀝青混合料配合比設(shè)計研究
[Abstract]:In recent years, with the continuous progress of society and the rapid development of automobile manufacturing industry, the improvement of pavement performance of asphalt mixture and the reduction of pollution caused by waste tires have become a difficult problem for various traffic departments. A very effective treatment is to add rubber particles from used tyres to the asphalt mixture. Rubber particles have a large elastic deformation capacity, under the action of vehicle load and self-stress, the thin ice pavement will have a certain ability to remove ice and snow on the basis of extensive investigation. The key technology of dry rubber asphalt mixture is studied. Through a large number of experimental studies, this paper studies the mix ratio design of rubber particle asphalt mixture and the optimum mixing and forming technology, and analyzes how the pavement performance changes under the influence of rubber particles of different content and particle size. The recommended value of the rubber particle content and particle size is also given. This paper analyzes the causes of affecting road performance index of dry rubber asphalt mixture. To establish the technical support for the popularization of this technology in the seasonal frozen area of Liaoning and Shenyang, and to provide relevant research results for the development of the technology. The research results show that the mixing time of rubber granular asphalt mixture should be increased properly, and the heating temperature of stone and mixing temperature of mixture should be raised appropriately, and the process of secondary molding should be adopted. It can obviously reduce the porosity and springback of rubber grained asphalt mixture, and the forming effect is better. Compared with ordinary asphalt mixture, dry rubber asphalt mixture has good high temperature stability, high temperature crack resistance and skid resistance, and other indexes meet the requirements of relevant specifications. The mixing technology and paving technology of rubber asphalt pavement are studied through the paving of the test road of solid engineering, and the road performance indexes of the pavement are tested on the spot, and the results of indoor test and research are verified. Finally, suitable mix ratio design and paving process are provided. In a word, dry rubber granular asphalt mixture has outstanding anti-slip performance and rutting resistance, at the same time, the low temperature crack resistance and durability are also greatly improved compared with the ordinary asphalt mixture. Many indexes of the mixture meet the standards of modified asphalt mixture and SMA modified asphalt mixture, and the construction technology is simple, the cost is low, and the waste rubber resources can be used effectively. It is a new technology with good prospect of popularization and application.
【學(xué)位授予單位】:沈陽建筑大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:U414
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