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To simulate the influence of the corrosion environment caused by snow-melting agent on pavement, an asphalt mixture was treated by dry-wet cycle in a NaCl solution with various concentrations. The rutting test, bending test, freeze-thaw splitting test, immersion Hamburg wheel-track test, industrial computed tomography (ICT) test, and scanning electron microscope (SEM) test were conducted to evaluate the adverse effect of snow-melting agent on road performance, durability, and the microstructural characteristics of SMA13, AC13, and SUP13 asphalt mixtures. The damage mechanism of performance for asphalt mixtures in a corrosion environment was also discussed. The results show that the road performance and durability of SMA13, SUP13, and AC13 asphalt mixtures decrease by various extents after being treated by the method of dry-wet cycle in chloride salt solution. Among the three kinds of asphalt mixture, SMA13 shows the best resistance to the corrosion of NaCl solution, followed by SUP13 and AC13. After being treated in salt solution, the void parameters such as total void volume, average void volume, equivalent void diameter, and air void of a Marshall specimen grow fast first and then tend to stabilize. The crystallization expansion of NaCl crystals results in structural damage inside the mixture, and then the strength of the asphalt mixture greatly declines, leading to the deterioration of road performance and durability in a salt corrosion environment. SMA13 asphalt mixture is recommended for pavement surface layers where the snow-melting agent is often used. [ABSTRACT FROM AUTHOR]

• The permanent deformation of asphalt mixture under coupling effect was discussed. • Effect of moisture, overload and low loading frequency needs to be considered. • Anti-rutting agent PR with dosage of 0.45% was recommended for asphalt mixture. To evaluate the influence of vehicle load and driving speed on permanent deformation characteristic of asphalt mixture in high temperature and rainy areas, the Hamburg wheel tracking test was conducted under different test conditions by changing the wheel load, loading frequency and test environment. The permanent deformation characteristic of asphalt mixture under coupling effect of moisture, overload and loading frequency was discussed. Meanwhile, three kinds of anti-rutting agents commonly used in engineering were selected, and the influence of various anti-rutting agents on permanent deformation characteristic of asphalt mixture was also studied by rutting test and Hamburg wheel tracking test. The results show that the moisture, load and loading frequency are important factors affecting the permanent deformation characteristic of asphalt mixture. Under coupling effect of moisture, overload and low loading frequency, the ability of asphalt mixture to resist the generation and development of permanent deformation is poor. The influence of coupling effect of moisture, overload and low loading frequency needs to be considered when evaluating the anti-rutting performance of asphalt mixture. After the addition of anti-rutting agent, the dynamic stability of asphalt mixture increases significantly first, and then tends to be gentle when the dosage of anti-rutting agent exceeds 0.45%. The difference of improvement effect of various anti-rutting agents on rutting resistance of asphalt mixture is obvious, and the improvement effect is in order of PR. PLASTS (PR) > RESIN ALLOY (RA) > Duroflex (Df). The anti-rutting agent PR with dosage of 0.45% is recommended to improve the resistance of asphalt mixture to permanent deformation. The research results can provide some references for improving the rutting resistance of asphalt pavement in high temperature and rainy areas. [ABSTRACT FROM AUTHOR]