Investigation Of Asphalt Pavement Structure Resistance To Rutting On Large Longitudinal Slope

ABSTRACT:With economic development, highway construction set off a wave of the future highway planning, the focus has been transferred to the west, and extending to the mountains. China's basic conditions of the domestic road traffic characteristics, excessive overloading overloading the highway asphalt pavement rutting occurred prematurely, especially in the longitudinal section of growing up, the vehicle speed and slow speed start serious damage the pavement structure, a security risk.This paper explores growing up longitudinal cause damage to asphalt pavement. Analysis of asphalt pavement when the temperature equivalent features, and application software to ABAQUS finite element analysis methods. Work in different circumstances, grew up in the asphalt pavement uphill test, draw the state with maximum stress variation, according to data derived curve analysis. Load beyond the load conditions, were tested in various stress significantly increased trend; grow up to speed when driving on a slope, the stress of the most significant increase is the shear stress. Grow uphill asphalt vulnerable vehicle acceleration and deceleration, slow driving and excessive load in case of damage. The paper also carried on the vehicle on the downhill study analyzed grew uphill slope, slope length and the relationship between vehicle speed and road effects on the mechanical behavior, build a track and its role in the deformation and stress time relationship model. Based on this analysis, we recommend a grown uphill side of the skeleton as a dense mixture of asphalt and related designs..This paper the design method of asphalt do not produce a test piece with a lot of volume and its related performance tests. Compliance with relevant technical specifications, the points after third gear for dry coarse aggregate fill tamping test, to determine the quality of coarse aggregate third gear ratio relationship, and thus have the formula to calculate the filling volume of the total content of the skeleton. For the calculation of more than Hone, first determine the powder cement ratio, coarse aggregate for the three screening tests. The actual role of the combined effects of the road into a single factor for rutting test. The test were carried out on conventional rut, rut change set, soaking track, track speed, variable temperature rutting, rutting test variable slope, and depth and structure to the friction coefficient test. The SBS-13 in the regular gradation in the two SMA-13, AC-13 were compared. Three kinds of gradation of the track than the value of dynamic stability is not reduced before freezing a lot, but as the number of freeze-thaw increases. Freeze-thaw cycles after soaking rutting test, AC minimum of dynamic stability, SMA's most dynamic stability, and dynamic stability of SBS center, rut depths to the contrary. Actual highway pavement while sliding the indicator to meet the depth of the friction coefficient and surface structure, but the latter is more important. SBS-13 SMA less than the amount of asphalt, and not doped fiber, saving investment, with the overall level slightly higher than SMA thin, easy construction, is a good sliding and rutting resistance of pavement materials.