Phosphogypsum brick

According to your introduction, when producing phosphogypsum bricks, the only thing that will affect the human body is fluoride, and the rest will not affect the human body. After the phosphogypsum is treated, the fluoride in it should be non-volatile, and the influence of this fluoride on human body can only be formed by contacting the brick body, so there is no serious problem with the wall coating. The main reason for wall cracking may be that this kind of brick will have a large volume change due to the change of water content (relatively speaking). As for radioactive testing institutions, objectively speaking, it should be the National Bureau of Product Quality Supervision and Inspection, with branches all over the country. The word "official report" deserves caution.