Steep Sections Of Sma Asphalt Mixture

With the rapid development of our transportation, high standard highway come into mountains gradually, steep slope road will appear inevitably. The horizontal and vertical load act synthetically on the asphalt mixture pavement on steep slope road section, so the asphalt mixture will appear shear breakage easily. And also, the speed of vehicles on the upgrade section is very slow. This makes more rutting because of longer time of the stress on the pavement. And also, the rutting can be taken as the result of the asphalt mixture's plastic flow. So it requires adding the shear resistant test while mix designing. But it is difficult to popularize the traditional triaxial test. We introduce advanced design ideas and invent Multifunctional Road Material Penetration Strength Apparatus in this research. The shear strength is carried though the uniaxial penetration test on the apparatus, Combined with the uniaxial pressure test method, calculating the cohesion and inner angular of asphalt.Suspended dense structure asphalt mixture is designed and checked its properties with the wheel rutting test. The optimum mixture is selected to do the uniaxial penetration test and uniaxial pressure test. Two important parameters are confirmed with the test result.Suspended dense structure asphalt mixture is designed and checked its properties with the wheel rutting test. The optimum mixture is selected to do the uniaxial penetration test and uniaxial pressure test. Two important parameters are confirmed with the test result.SMA is a dense, gap-graded bituminous mixture with high contents of stone, filler and bitumen, modified with a suitable binder carrier such as cellulose fibre. The essential elements of mixture design comprise the formation of an interlocking stone skeleton that provides high resistance to deformation and the filling of the skeleton voids with a rich bituminous mortar to provide high durability. So this paper will research the shear properties of SMA through the wheel rutting test and uniaxial penetration test, the aim is to help the selection of asphalt mixture on the steep slope road section. The paper analyzes the effect of the type of cellulose fibre, aggregate,...