Abstract:
Water carrier foamed warm mix asphalt (WMA) achieves asphalt foaming by introducing water, which reduces construction temperature while ensuring pavement performance. It is an important development direction for low-energy consumption and greening of road materials. This work systematically reviews the classification and structural characteristics, water release and stability behavior, as well as synthesis and modification properties of zeolite-based water carriers. The foaming mechanism, evaluation methods of foaming effect and influencing factors of zeolite foamed WMA are elaborated, and the influence of the foaming process on the performance of WMA mixtures is summarized. Existing studies show that zeolites can realize a relatively mild asphalt foaming process due to their controlled water release characteristics, making it difficult for traditional foaming evaluation indexes to accurately reflect its warm mix applicability. On this basis, it is proposed that future research should focus on the functional design of zeolite-based water carriers, the multiphase composite and performance improvement of water-carrier foamed WMA, as well as the applicable evaluation system of foaming effect. Meanwhile, the life cycle benefit evaluation under resource-based synthesis and process optimization should be strengthened to promote the engineering application and sustainable development of such composite materials.