Author(s): ZHANG Ke, ZHANG Zhengqi, Key Laboratory of Highway Engineering in Special Region of Ministry of Education, Chang’an University
Pages: 64-68+73
Year: 2015 Issue:  1
Journal: Engineering Journal of Wuhan University
Keyword:  salty and humid area; asphalt mixture; anti-stripping agent; type; optimum dosage range;
Abstract: In order to improve the water stability of asphalt mixture in salty and humid area,firstly,the improved water-boiling tests were carried out to determine the reasonable dosage of anti-stripping agents in salty and humid environment preliminarily.Then,freeze-thaw splitting test and dynamic water scouring and splitting test on asphalt mixture mixed with different asphalt anti-stripping agents were carried out to optimize the type of anti-stripping agent suitable for salty and humid environment.Finally,Hamburg wheel tracking test in water and rutting test and low temperature bending test were carried out to determine optimum dosage range in salty and humid environment.The results show that the performance of non-amine anti-stripping agent A and T is better than amine anti-stripping agent P and H after aged.Freeze-thaw splitting strength ratio and dynamic water scouring and splitting strength ratio of asphalt mixture mixed with anti-stripping agent A are higher than others.Anti-stripping agent A is recommended to improve water stability of asphalt mixture in salty and humid area.The optimum dosage range of antistripping agent A is 0.5%-0.7% of asphalt content.