| With the highway volumes and natural environment, property of flexible pavements deteriorates gradually owing to asphalt aging and aggregate finning and structure changing of asphalt pavement. Therefore, lots of pavements need to repair in large. Scale even repave wholly after using a long time, which will bring large numbers of waste asphalt mixture. Therefore, it is important to regenerate the waste asphalt mixture in order to protect environment and economize resource.This article focuses on application of the cold recycling technology in basecource of freeway and first-class highway^ surfacing of the secondary and the following secondary road. Now mainly used for cold recycling mixture below the basecourse or roadbase, limiting the development of cold recycling mixture. So the researchers used surface course of cold recycling mixture is necessary.By laboratory experiments on the analysis of asphalt mixture used to determine the old asphalt mixture gradation and asphalt content; according to the principle of cold recycled recycling agent, testing with 100% old material, to 60? Marshall stability index for the control,comprehensive comparison RJSeal, liquid asphalt, diluted bitumen, PTN, epoxy such as recycled agent on the regeneration of the old asphalt mixture effect, final preparation of the good FXK cold rejuvenating agent, and identified a relatively old regenerant optimum amount of asphalt mixtures; by grading design, determine the size of 0.075mm sieve through the rate of 8.0%,7.0%,6.0%.5.3% of the size distribution, while the old material content determined to be 70%,57%,44%,37%, Marshall indicators of results obtained with the best combination of each class the amount of material; use at all levels with the best combination of materials testing water stability, high temperature stability, low temperature crack resistance and other road performance, determined through analysis of flexible cold recycling mixing agent the amount of the old asphalt?... |
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