The Experiment Investigation Of Cold Recycling Technology Of Old Asphalt Mixture

With the freeway 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 as the old asphalt mixture of Changfu highway road surface been repaired to object, Through laboratory research, Estimate the old asphalt mixture, Ascertain the gradation and asphalt content of old asphalt mixture; Select two kinds of regenerant, Based on the relation of regenerant dosage and the primary index of regenerate asphalt to ascertain the optimum regenerant content, Estimate their regenerate capability and antiaging capability; As certain the kind of impregnant and the dosage, Through the manner of confecting liquid asphalt to achieve the objective of mixing in normal temperature; Design impregnant normal temperature regenerate asphalt mixture, Test their road performance, Ascertain optimum asphalt content and optimum rate of old mixture using, Analyse economy feasibility of impregnant normal temperature regenerate project and apply foreground, For the design,the construction of impregnant normal temperature regenerate asphalt mixture provides thereference basis.