Study On The Technical Performance Of Asphalt Mixed With BRA

In recent years, With the continuous development of the asphaltpavement of high grade highway, Domestic asphalt pavement designthickness also changes after, According to the asphalt pavement of highgrade of Shanxi province are the main diseases, Such as rut, water damage,pit slot, etc, In order to improve the safety of the asphalt pavement structure,stable, durable, such as performance, Optimize the asphalt pavementstructure and surface above average use modified asphalt has entered theapplication stage. This paper in reference to domestic and foreign modifiedasphalt pavement on the basis of the relevant information, combined withmy company Baoji to the asphalt pavement ShanGan project applicationrock asphalt modified asphalt mixture paving, and carry out the BRAmodified asphalt mixture of technical performance study.This paper first to the study of the Buton Rock Asphalt elements of theasphalt composition analysis, chemical structure and characteristics areanalyzed, and through to the BRA rock melt and regular test asphalt, anotherBRA the minerals is very fine, has the very good absorption ability of asphalt, asphalt mixture greatly improve the rubber paste performance.Secondly, Based on the project climate of Shangan to baoji, trafficflow, pavement structure characteristics and so on, according to the existingsite aggregates and Relevant technical specifications of the<<Highwayasphalt pavement construction technical specifications>>（JTGF40-2004）.The AC-20asphalt mixing ratio of design work, at the same timeaccording to different rock asphalt content is choose rock than the economicfactors into asphalt, asphalt mixture and technical indexes than SBSmodified asphalt mixture, the selection of asphalt mixture is morereasonable and economy in rock dosage of asphalt. In addition, we also torock asphalt modified asphalt mixture and SBS modified asphalt mixtureperformance indicators for the contrast experiment, the results show that therock asphalt modified asphalt mixture of high temperature stability and SBSmodified asphalt mixture, but its long-term performance quite durableperformance than the SBS modified asphalt mixture. In addition, rockasphalt modified asphalt mixture comprehensive unit price is SBS modifiedasphalt mixture sex to cheap, and it belongs to physical modification, the environmental pollution and energy consumption is low.Then, according to indoor laboratory that the BRA asphalt mixture,and through the field performance of asphalt mixing building and debugging,eventually optimization the determination of reasonable BRA asphaltmixture proportion of production and, at the same time, according to theBRA asphalt mixture production with the production of asphalt mixturewater stability, the high temperature stability, the low temperature bendingtest, such as with the standards of the current highway modified asphaltmixture of technical requirement, the results show that the BRA than thetechnical performance of asphalt mixture to comply with relevant SBSmodified asphalt mixture requirement, can be in the implementation stage ofthe project entity.Finally, this topic through the BRA asphalt mixture in Baoji toShangan world project YK68+800~YK70+800and YK108+410~YK110+410for two of the past construction experimental road surface, theasphalt pavement construction technology and BRA quality monitoring,inspection and analysis the asphalt pavement construction BRA when the temperature of the mixing station, ratio of mixture performance index,paving the way to mechanical combination, degree of compaction,roughness and the quality control. The results show that the BRA asphaltpavement construction backcourt mixing station and the front roadconstruction quality control is better, the construction organization andscience, test and construction quality control, and through the YK68+800~+800YK70testing road traffic, nearly a year testing road use effect isgood.In short, the subject of the proposed BRA modified asphalt mixtureproportion design, mixture of performance index, mixture production craft,test of road construction quality control for BRA, modified asphalt mixturethe further expansion of applied to provide the beneficial reference for thetechnology.