Rice hull-derived silica: applications in Portland cement and mullite whiskers

Materials Research

M.f. De Souza²  P.s. Batista²  I. Regiani²  J.b.l. Liborio¹  D.p.f. De Souza¹ 

[1] ,Universidade de São Paulo Departamento de Física e Ciência de Materiais São Carlos SP ,Brazil

关键词: silica;    concrete;    mullite;    rice hulls;   

DOI  :  10.1590/S1516-14392000000200005

来源: SciELO

【 摘 要 】

Silica was extracted from rice hulls by three processing routes, starting with acid treatment followed by burning and milling. The amorphous white silica powder showed a surface area of 260 to 480 m²/g, purity above 99% and average particle size of 2.0 to 0.6 mm. This silica is suitable for the preparation of mullite whiskers employing the rare earth aluminosilicate glass technique. Due to its highly pozzolanic reaction, this prepared silica is used as an additive in high performance concrete.

【 授权许可】

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