Research and Application of Green Environmental Cold Mix Asphalt Mixtures for Township Roads

Abstract

In this study, oleic acid and a water-based cold mix agent were introduced to prepare cold mix asphalt. AC-13 was selected as the aggregate gradation for the mixture design, with the optimal asphalt-to-aggregate ratio determined to be 4.9%. Additionally, cement was incorporated to replace part of the mineral powder, further improving the pavement performance of the cold mix asphalt mixture. The cold mix cold paving asphalt mixture was cured at 110°C, and its pavement performance was tested. The results showed that the modified cold mix cold paving asphalt mixture exhibited excellent road performance, with a dynamic stability exceeding 1500 times/mm, a water immersion residual stability strength ratio greater than 80%, a freeze-thaw splitting test residual strength ratio over 70%, and a scattering loss rate of less than 10%. The material was trial-paved in a factory area in the High-tech Zone of Zhengzhou, Henan Province, in July 2023. The current road conditions are performing well, further demonstrating the strong potential of this technology for widespread application.