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BIBTEX RIS

Production of silica gel from residual rice husk ash

2011; Brazilian Chemical Society; Volume: 34; Issue: 1 Linguagem: Inglês

10.1590/s0100-40422011000100014

ISSN

1678-7064

Autores

Samantha Pinheiro Buás de Lima, Raimundo Pereira de Vasconcelos, Otávio Augusto Paiva, Guilherme Chagas Cordeiro, Márcia Rodrigues de Morais Chaves, Romildo Dias Tolêdo Filho, Eduardo de Moraes Rego Fairbairn,

Tópico(s)

Clay minerals and soil interactions

Resumo

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.

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