Performance evaluation and technical requirements of asphalt pavement crack seal band

In order to evaluate in-situ performance of asphalt pavement crack seal band, crack filling practice and field investigation were conducted. The investigation results show that seal band technology has not only high construction efficiency but also less secondary disease and good performance. Based on three primary failure modes of seal band, four evaluation indices including penetration cone, softening point, pull-out and low-temperature extension test were proposed, by reference of Chinese hot-applied sealant specification of transportation industry and related enterprise standards. Six seal band samples were tested, according to the test results and the technical requirements of hot-applied sealant, the technical requirements of the evaluation indices were presented.