Durability of asphalt mixture in different corrosion solution

作者：Chen Shuanfa; Guan Bowen^*; Xiong Rui; Sheng Yanping; He Rui

来源：Journal of Wuhan University of Technology-Materials Science Edition, 2011, 26(6): 1200-1204.

DOI：10.1007/s11595-011-0390-2

• asphalt mixture
• corrosion damage
• corrosion mechanism
• corrosion evaluation

The corrosion to asphalt mixture under different kinds of corrosion solution, such as pH=2 solution, pH=12 solution, pH = 12 solution and 10% Na(2)SO(4) solution, was studied. The performance attenuation of asphalt mixture was analyzed under the normal environment and the freeze-thaw environment, and the analysis was given on the sensitivity of the test results to the evaluation index. The experimental results show that the performance of asphalt mixture is attenuated faster under the acidic solution, alkaline solution and sulfate solution. Corrosion factor K (c), freeze-thaw corrosion factor K (f), and freeze-thaw effect factor K (fc) are proposed to evaluate asphalt mixture resistance to corrosion in different kinds of corrosion solution. The values of K (c) and K (fc) decrease with the increasing of corrosion time. The change rule of K (f) show that the rate of corrosion is decreased by the action of freeze-thaw in acidic solution and in alkaline solution, but is increased by the action of freeze-thaw in sulfate solution. The microscopic analysis indicates that acid solution reacts with aggregate of asphalt mixture, alkaline solution reacts with asphalt cement of asphalt mixture, the surface tension of sulfate solution and crystallization of sulfate are the main reasons which weak the performance of asphalt mixture.

• 出版日期2011-12
• 单位长安大学