随着建筑事业的发展,混凝土预制大板和饰面砖板的应用已比较广泛,同时,老厂改造的任务也越来越大。但是,这些材料及其构件的基层表面或较光滑或由于脱模剂及油污的存在,使它们与水泥砂浆的粘结强度降低,从而导致水泥砂 With the development of the construction industry, the application of prefabricated concrete slabs and facing bricks has become more extensive. At the same time, the task of retrofitting old factories is also growing. However, the surface of the base material of these materials and their components is relatively smooth or due to the presence of release agents and oil stains, so that their bond strength with cement mortar is reduced, resulting in cement sand