Study on the Performance Influencing Factors of SBS Modified Emulsified Asphalt Cold Recycled Mixes with High RAP Dosage
In order to improve the performance degradation of cold recycled mixtures caused by high RAP dosage,this paper investigates the design and performance of cold recycled mixtures using SBS modified emulsified asphalt as recycled asphalt.Cold recycled mixtures with different RAP dosage were designed and prepared,and the effects of cement dosage,asphalt dosage,and maintenance method on the mechanical strength,high temperature stability and water damage resistance of the mixtures were investigated.The test re-suits show that in the design of cold recycled mixes,the higher the RAP dosage,the higher the optimum water content and the lower the optimum emulsified asphalt dosage.Although the increase of RAP dosage will lead to the reduction of mechanical strength and high temperature performance of the mixture,the properties of cold recycled mixtures with a dosage of 88％or less can meet the recycling specification requirements,which proves that SBS modified emulsified asphalt effectively improves the problem of insufficient performance of cold recycled mixtures with high RAP dosage.The increase of cement content will improve the strength and durabil-ity of cold recycled mixtures,while the increase of asphalt dosage will first improve and then reduce the per-formance of the mixtures.
SBS modified emulsified asphaltcold recyclinginfluencing factorsRAP
NETL
NSTL
万方数据
