Completely combustion of rice husk will produce Rice Husk Ash. This ash is a potential source of amorus reactive silica, which has a variety of applications in materials science. Most of the ash is used in the production of Portland cement.
A of possible uses for RHA include absorbents for oils and chemicals, soil ameliorants, a source of silicon, insulation powder in steel mills, as repellents in the form of "vinegar-tar" release agent in the ceramics industry, as an insulation material. More specialized applications include the use of this material as a catalyst support.