PRODUCTION OF SILICA GEL FROM RESIDUAL RICE HUSK ASH

被引：37

作者：

Buas de Lima, Samantha Pinheiro ^{[1
]}

de Vasconcelos, Raimundo Pereira ^{[2
]}

Paiva, Otavio Augusto ^{[2
]}

Cordeiro, Guilherme Chagas ^{[3
]}

de Morais Chaves, Marcia Rodrigues ^{[4
]}

Toledo Filho, Romildo Dias ^{[5
]}

Rego Fairbairn, Eduardo de Moraes ^{[5
]}

机构：

[1] Univ Fed Amazonas, Fac Tecnol, BR-69077000 Manaus, AM, Brazil

[2] Univ Fed Amazonas, Dept Construcao, BR-69077001 Manaus, AM, Brazil

[3] Univ Estadual Norte Fluminense, Lab Engn Civil, BR-28013602 Campos Dos Goytacazes, RJ, Brazil

[4] Univ Sao Paulo, Dept Engn Quim, Escola Politecn, BR-05424970 Sao Paulo, Brazil

[5] Univ Fed Rio de Janeiro, Inst Alberto Luiz Coimbra Posgrad & Pesquisa Engn, BR-21941972 Rio De Janeiro, Brazil

来源：

QUIMICA NOVA | 2011年 / 34卷 / 01期

关键词：

silica gel; sol-gel; rice husk ash; CANE BAGASSE ASH; HULL ASH; THERMAL-TREATMENT; CEMENT;

D O I：

10.1590/S0100-40422011000100014

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

PRODUCTION OF SILICA GEL USING RESIDUAL RICE HUSK ASH. This paper presents a study on the production of silica gel in hydrothermal process using residual rice husk ash. Measurements of the chemical composition, X-ray diffraction, infrared spectroscopy, particle size distribution, and pozzolanic activity were carried out in order to characterize the obtained material, and the optimal silica gel was selected for use as a mineral additive in cement pastes. The compressive strengths were determined for cement pastes containing silica gel (0.0, 2.5 or 5% by mass) in different times. The results indicate that the mixtures containing silica gel showed improved mechanical behavior over all time periods evaluated.

引用

页码：71 / U88

页数：6

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