METHOD FOR PRODUCING ASPHALT EMULSION AND METHOD FOR ADJUSTING VISCOSITY OF ASPHALT EMULSION

To provide a method for producing an asphalt emulsion that allows easy viscosity adjustment and maintains good emulsifiability over a long period of time, and to provide a method for adjusting viscosity of asphalt emulsion.SOLUTION: The method for producing asphalt emulsion includes a mixing step of mixing a closed vesicle formed with amphipathic substance that spontaneously forms a closed vesicle and/or a particle of polycondensation polymer having hydroxyl group with water to yield a mixture solution, an emulsification step of mixing an asphalt and the mixture solution to yield an emulsion containing an emulsion particle in which the surface of asphalt particle is covered with the closed vesicle and/or the particle of the polycondensation polymer, and a water addition step of adding water to the emulsion.SELECTED DRAWING: None 【課題】粘度調整が容易であり、良好な乳化性を長期間に亘って維持できるアスファルト乳剤の製造方法およびアスファルト乳剤の粘度調整方法を提供する。【解決手段】アスファルト乳剤の製造方法は、自発的に閉鎖小胞体を形成する両親媒性物質により形成された閉鎖小胞体および／または水酸基を有する重縮合ポリマーの粒子と水とを混合して混合溶液を得る混合工程と、アスファルトと前記混合溶液とを混合し、アスファルト粒子の表面が前記閉鎖小胞体および／または前記重縮合ポリマーの粒子で覆われているエマルション粒子を含む乳化液を得る乳化工程と、前記乳化液に水を添加する加水工程とを有する。【選択図】なし