This research aims to reduce construction temperature of asphalt rubber pavements by at least 20℃. It focuses on literature research, laboratory tests, plant production and paving site trials, in cope with comprehensive analysis on energy saving and emission reduction. The warm mix asphalt technologies are introduced in a hot mix plant, adjusted, and applied to the mixing of rubberized asphalt mix. It is expected that the temperature of the rubberized asphalt mix to be tr ansported to the paving site will drop from 150 °C to below 130 °C. The results of laboratory evaluation show that, compared with conventional asphalt, asphalt rubber has a lower expansion ratio and a shorter half-time; when gap-graded aggregate blend is mixed with mechanical foamed asphalt rubber, it is not necessary to obtain a high expansion ratio and long half-time, the expansion ratio is 6 times, and the half-time is 3 seconds, which can be completely coated at 135 °C; the subsequent compaction ratio measured at 125 °C is 1.20, which is judged to be able to be adequately compacted. The mixing temperature was 135°C, and the compaction temperature was 125°C. In the trial at the hot mixing plant, it is verified that the asphalt rubber produced by the current blending machine is pumped to the measuring basket of the hot mix plant for measurement, and then sprayed into the mixing machine after adding water and foaming through the installed mechanical foaming pipe. It can smoothly produce warm-asphalt rubber gap graded mix, and reduce the mixing temperature by 25℃. In terms of actual road paving test site, the monitoring data of trial mix at the factory and on site at the selected process temperature show that the compaction degree of the warm mix asphalt pavement meets the requirements of the current specifications, while the smoothness is higher due to the careful construction and paving.

Waste Tire, Asphalt Rubber, Warm Mix Asphalt, Energy Saving and Emission Reduction