Study On The Designing Method And Pavement Performance Of LSAM

Modern heavy-duty traffic requires that asphalt mixture has good high-temperature stability anddurability. In order to improve asphalt mixture performance, a large number of new materials andtechnology appear recently. Because major study objects are strengthening performance of asphalt mixturethrough modified asphalt, but existing study lacked research production of mineral aggregate structure andthe asphalt pavement structure.In view of lack of strength of asphalt mixture and unreasonable pavement structure combination, thepaper researches strength mechanism, design method and structure performance of LSAM. At first, thepaper analyzes characteristics of structure composition of mineral aggregate, presents mineral aggregatestructure mechanism and determines aggregate according to interlocking, grouping of filling effect andcritical control point. On this basis, changes the thickness of boundary to interlock and filling the boundaryin Bailey method, put forward design method of performance to asphalt mixture structure by the gyratorycompactor. The dynamic modulus test, low temperature bending strain energy density test, Water stabilitytest and Fatigue load test shows that pavement performance of LSAM and AC is excellent by this method.In view of the excellent LSAM, this paper presents heavy loading long-life asphalt pavement structure ofLSAM as intermediate layer through theoretical analysis. The structure has good high and low temperaturestability and durability by testing road and the field.Design method of performance to asphalt mixture structure use with new heavy asphalt pavementstructure is available for variety of particle size asphalt mixture, which put forward important reference forthe heavy loading long-life asphalt pavement construction in China.