Production of silica gel from residual rice husk ash

Química Nova

Samantha Pinheiro Buás De Lima²  Raimundo Pereira De Vasconcelos¹  Otávio Augusto Paiva¹  Guilherme Chagas Cordeiro¹  Márcia Rodrigues De Morais Chaves¹  Romildo Dias Toledo Filho¹  Eduardo De Moraes Rego Fairbairn¹ 

[1] ,Universidade Federal do Amazonas Faculdade de Tecnologia Manaus AM ,Brasil

关键词: silica gel;    sol-gel;    rice husk ash;   

DOI  :  10.1590/S0100-40422011000100014

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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