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Nonlinear Simulation Of Asphalt Aging And Recycling Strategy Study

Posted on:2009-03-13Degree:MasterType:Thesis
Country:ChinaCandidate:X P JiFull Text:PDF
GTID:2132360272983173Subject:Road materials science
Abstract/Summary:PDF Full Text Request
The recycling of road waste materials is not only practical situation to promote developing of the economic cycling, but also is objective requirements to control pollution and improve the environment. Therefore, it has the significance that making full use of the old asphalt pavement materials, making waste resources materials will be used to again and studying of recycling technology. Recycling of road waste materials is the focused on the reclaiming of the aging asphalt. The road will appear cracks, water damage and other diseases in the process and the performance of pavement will happen cycle of decay, in this cycle of decay in a significant factor is the aging of asphalt leading to the performance of decay. Therefore, it is very necessary to determine the aging asphalt dynamic process and the performance of different times and to provide for the resumption of renewable basis for decision making,.In this paper, the nonlinear simulation of aging asphalt and recycling strategy study concludes two major parts: the first part is the nonlinear simulation of aging asphalt; the second part is recycling strategy study. Specific researches are as following: 1. Research on nonlinear simulation of thermal and oxygen aging of asphalt indoor; 2. Research on nonlinear simulation of long-term aging of asphalt under the conditions of actual use; 3. Research on nonlinear simulation of UV aging of asphalt and countermeasure against UV aging; 4. Study of the method of asphalt recycling; 5. Research on law of aging asphalt reclaiming a; 6. Study of regeneration of discarded asphalt mixture.Reaching the following conclusions through systematic research: 1.Process of thermal and oxygen aging of asphalt indoor can be simulated with non-linear equation, and different asphalt index have different aging equation; 2. Long-term aging of asphalt under the conditions of actual use can be simulated with non-linear equation; 3. Asphalt UV aging process can be accurately described with non-linear equation; 4. Accession to the UV absorber can significantly improve the asphalt performance of skin UV aging; 5. A small amount of slag and trichloroethylene in the asphalt can create o Obvious influence; 6.,The diffusion coefficient and proliferation are get out according to the diffusion equation, and that temperature is main factors; 7. The addition of renewable is used whether or not is the main factors to effect waste asphalt spreading to new aggregates; 8. Adding new asphalt or regeneration can easily achieve the reclaiming o, and reclaiming laws meet well the theoretical formula 9. Hot recycling asphalt mixture has excellent road performance, in particular the high temperature stability.
Keywords/Search Tags:asphalt aging, ultraviolet, nonlinear simulation, diffusion, hot reclaim
PDF Full Text Request
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