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2014 | OriginalPaper | Buchkapitel

6. Rice Husk Ash

verfasst von : Ali Akbar Ramezanianpour

Erschienen in: Cement Replacement Materials

Verlag: Springer Berlin Heidelberg

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Abstract

Rice-husk (RH) is an agricultural by-product material. It constitutes about 20 % of the weight of rice. It contains about 50 % cellulose, 25–30 % lignin, and 15–20 % of silica. When rice-husk is burnt rice-husk ash (RHA) is generated. On burning, cellulose and lignin are removed leaving behind silica ash. The controlled temperature and environment of burning yields better quality of rice-husk ash as its particle size and specific surface area are dependent on burning condition. For every 1000 kg of paddy milled, about 200 kg (20 %) of husk is produced, and when this husk is burnt in the boilers, about 50 kg (25 %) of RHA is generated. Completely burnt rice-husk is grey to white in color, while partially burnt rice-husk ash is blackish

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Metadaten
Titel
Rice Husk Ash
verfasst von
Ali Akbar Ramezanianpour
Copyright-Jahr
2014
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-642-36721-2_6