Then, can a small amount of stone powder, cement and yellow sand be mixed together to paint semi-polished walls and paste wall tiles? thank you

This kind of mortar, which consists of lime, cement and sand, is called three-in-one mixed mortar in the industry, and is often used for interior wall painting. In some rural areas and relatively self-built houses, many of them are used for exterior wall plastering. Generally speaking, this kind of mortar is not suitable for sticking tiles on it because of its low density and high hardness, but this is not absolute. There are also many places with solid foundations and stable geographical conditions, and there is no problem. Some have reached the service life of 10 or more. To judge whether ceramic tiles can be pasted, it is necessary to comprehensively consider that only when the foundation is stable (that is, the building has been built for more than one year, the foundation has not obviously sunk or cracks appear in local walls) and the wall skin has fallen off can ceramic tiles be pasted. However, it is suggested to clean, polish and strengthen the base before sticking bricks (generally, it is painted with plain cement mortar mixed with glue once or twice), and the surface can be confirmed to be firm after short-term maintenance.