Experimental Research On Pavement Performances Of Asphalt Mixture With Anti-rutting Agent And Styrene Butadiene Styrene Modifier

High-temperature stability, low-temperature crack resistance and water stability are main performances of asphalt pavement. Currently, additives have been widely applied to research asphalt pavement performances. However, additive dosage, asphalt mixture gradation and temperature factors have not been considered systematically in existing research. The diseases as road ruts, support package and pits will occur due to lower high-temperature stability, low-temperature crack resistance and water stability. As a result, traffic jam or accidents will be caused. Therefore, it is of far-reaching significance to study the performances of asphalt pavement for on-site construction.The influences of anti-rutting agent and Styrene Butadiene Styrene (SBS) modifier on the pavement performances of continuous gradation (AC-13and AC-16) and gap gradation (SMA-13and SMA-16) were studied in this paper. Rutting test at high temperature, bending test of small beam at low temperature, splitting and freeze-thaw splitting tests were conducted respectively to evaluate the performance of asphalt mixture in the cases of different temperatures, additive dosage and SBS contents. The result shows that the optimal anti-rutting agent dosage is0.4%and the optimal content of SBS modifier is5%. The high-temperature stability, low-temperature crack resistance and water stability of asphalt mixture added these two additives are better than that of ordinary asphalt. Under the condition of optimal dosage, the high-temperature stability of mixture with anti-rutting agent is better than that of mixture with SBS modifier. The order of DS of two gradations is SMA-16in maximum, followed by SMA-13, AC-16and AC-13. Meanwhile, under the condition of optimal dosage, the low-temperature crack resistance of mixture with SBS modifier is better than that of mixture with anti-rutting agent. Given the effect of two gradations, the test results of bending test at low temperature and splitting test are similar as well as the order of strain of asphalt mixture is SMA-13in maximum, followed by SMA-16, AC-13, AC-16. Besides, smaller mineral aggregate is more favorable for crack resistance at low temperature. The low-temperature deformation resistance of fine-grained gradation is also superior to that of middle-grained gradation. Under the condition of optimal dosage, the mixture with SBS modifier shows better water stability than mixture with anti-rutting agent. The order of TSR of two gradations is SMA-13in maximum, followed by SMA-16, AC-13, AC-16.