| 摘要 |
Lightweight building materials with high mechanical strengths are obtained from an otherwise noxious or difficulty-disposable sludge of gel-like aluminium hydroxide produced in large quantities in the process of the anodization treatment of aluminium shaped articles. The aluminium hydroxide sludge is first mixed with a calciferous material, which is preferably a combination of calcium oxide and gypsum, so that a reaction takes place between them to form etteringite and the thus obtained etteringite-containing mixture is blended with a fibrous reinforcing material such as a cellulosic pulp or asbestos and, optionally, hydraulic setting material such as a Portland cement to form a blend which is shaped into a desired form of, for example, wall or ceiling board followed by curing and drying. |
