Study On Volume Parameter Properties And Gradation Mix Design Method Of Asphalt Mixture

Asphalt mixture is made up of the aggregate, asphalt and filler. How to balance the ratio of theirs is very importance for increseasing asphalt mixture properties. The paper study on Volume Parameter Properties and Gradation Mix Design Method of Asphalt Mixture has significant engineering value based on volume parameters properties.Mortar theory deem that asphalt mixture is a kind of disperse system with the multilevel space network structure; Sand mortar is a kind of fine disperse phase that fine aggregate as disperse phase break up to asphalt motor medium, mortar is a kind of micro-disperse system that filler as disperse phase break up to asphalt medium. The paper based on three level disperse systems of asphalt mixture, AM is definitied as the volume ratio of sand motor volume made up of fine aggregate, asphalt and filler in asphalt mixture and coarse aggregate avoid volume.AP is definitied as the volume ratio of mortar volume made up of asphalt and filler and fine aggregate avoid volume .And study on mix design method of asphalt mixture with the indictors of AM and AP.The paper study on the volume parameters of asphalt mixture, anylazed the effective factors of CA, FAC and design density, put forward to the range of CA and FAC based on the different pavement performance. The pavement performance of asphalt mixture is more superior when the ratio of design density and coarse aggregate loose density is 100% -105% .CA and FAC have importance effective on asphalt mixture skeleton. And it has line relationshipsAsphalt mortar made up of asphalt and filler act as adhensive and fill in asphalt mixture has importance effective for asphalt mixture properties. The paper used 0.6-1.2 ratio of filler and asphalt with lime stone filler, cement and hydrated lime. Through normal test, dynamic shear rheometer and Brookfield viscosity test to anlyze technical characteristics of asphalt mortar , The paper study on the effect of differ fillers and the ratio of filler and asphalt on asphalt mortar properties. The results show that the ratio of filler and asphalt with different filler types have significant effecte of asphalt mixture. The cement asphalt motor has better resistance crack performance at low temperature than limestone asphalt mortar, and hydrated lime asphalt mortar can increase pavement performance at high and low temperature .The paper researches the determining method of various parameters and calculating means of gradation composition on base of AM AP design method for dense-graded asphalt mixture and according to the actual situation in our country. Through a lot of mechanical and pavement performance experiments, it is analyzed thoroughly the correlative rules between AM, AP and water stability, resistance to rutting at high temperature, low temperature crack resistance and skid resistance of asphalt mixture. Thus, the range of AM, AP is suggested according to the climatic condition and pavement performance requirements at different areas prescribed in criterion, which can be referrible while designing asphalt mixture gradation.The paper put forward to asphalt mixture garadation desgn method used as different types asphalt mixture base on pavement performance. It provide a new method for superior asphalt mixture performace.