Abstract

With application of cold recycling technology of asphalt pavement in road rehabilitation, now the new technology is still in grope stage at home. Indoor experimental study of cold recycled material is absolutely necessary in order to ensure road reconstruction quality and extend this technology. This experiment had valued the changing properties of reclaimed asphalt pavement (RAP) performance and gradation of cold recycled mixture was designed. We carried on unconfined compression test indoor about cold recycled mixture respectively adding cement、 lime and lime-fly ash as additives to analysis the influence of different additive on the strength property of mixture. So the characteristics of cold recycled material are determined by laboratory testing and considered in selecting the appropriate type and amount of additives. The results obtained show that: Study on performance variation about asphalt and aggregates of reclaimed asphalt pavement (RAP) can provide the basis for gradation design of cold recycled mixture;Cold recycled mixture with the same gradation added different additives has got different mechanical properties, and cold recycled mixture stabilized inorganic binders can be used as highway base or sub-base of pavement, which has also verified the feasibility of cold recycling

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