Author(s): H. El-Didamony, M.G. Abd El Wahed, Kh. M. Elewa and A.A. Amer
Article publication date: 1987-04-01
Vol. 5 No. 1 (yearly), pp. 45-57.
168
Keywords
rice husk, ash, agriculture
Abstract
Disposal or utilization of rice husk creates a problem for rice-growing countries. Its ash is whitish and fluffy that consists mainly of amorphous silica. This form is inert and not useful for agricultural and industrial purposes.
The result of this study presents the nature of fried rice husk ash. IR-spectroscopy and X-ray diffractometry technique were utilized. The reactivity of rice husk ash toward formation of beta-C2S was also investigated. The results showed that rice husk ash fired up 10 700"C is amorphous. whereas cristobalite is formed in increasing quantities at higher temperatures. The rate of formation of beta-C2S from rice husk ash is faster than from silica quartz, It may be concluded that rice husk ash is more reactive than natural quartz.