Evaluation method for water stability of slag asphalt mixture

The invention relates to the technical field of road engineering, in particular to a method for evaluating the water stability of a slag asphalt mixture. Comprising the following steps: establishing an adhesion model and a stripping model of asphalt and slag, and establishing an evaluation index ER according to the adhesion model and the stripping model; adopting a capillary ascending test to obtain surface energy data of the slag; measuring multiple asphalt surface energy data by adopting a contact angle instrument, and taking an average value as final asphalt surface energy data; substituting the obtained surface energy data of the slag and the surface energy data of the asphalt into an adhesion model and a stripping model to obtain corresponding adhesion work and stripping work; and obtaining the value of the evaluation index ER according to the adhesion work and the peeling work. According to the method, test calculation data is more reliable and objective based on the surface energy theory through the es