关键词: 道路工程, 温拌再生技术, 大比例, 路用性能, 最佳压实温度

Abstract: In order to solve the problem of road performance and on-site compaction temperature in RAP high-volume physical engineering in low-temperature areas, aiming at the warm mixed recycled asphalt mixture with different RAP content (0%, 30% and 50%), the rutting test, bending test and freezing-thawing splitting test were selected. And then the influence of polyester fibers on the pavement performance of the warm mixed recycled asphalt mixture was studied by comparing the content of polyester fibers. Superpave test method and variable temperature compaction test were used to study the effect of polyester fiber on the optimal compaction temperature of the warm mixed asphalt mixture with two kinds of RAP content (0%, 30%), with the porosity rate of 4.0% as the control index. The test results show that: compared with no fiber addition, the addition of polyester fiber significantly improves the high-temperature stability, low-temperature crack resistance and water stability of the warm mixed recycled asphalt mixture, which also satisfies the specification requirements. When the RAP content is 0% and 30%, the optimum compaction temperature of the warm mixed asphalt mixture is increased by 9°C and 10°C respectively by the polyester fiber, which means that polyester fiber has a significant influence on the optimal compaction temperature of warm mixed asphalt mixture.

Key words: highway engineering, warm mixed regeneration technology, large proportion, road performance, optimum compaction temperature