Tratamentos térmico e químico para remoção de óxidos alcalinos de cinzas de capim elefante

Química Nova

Erika Y. Nakanishi²  Ernesto Villar-cociña¹  Sérgio F. Santos²  Michelle S. Rodrigues¹  Pedro S. Pinto²  Holmer Savastano Junior² 

[1] ,Universidade de São Paulo Faculdade de Zootecnia e Engenharia de Alimentos Departamento de Engenharia de BiossistemasPirassununga SP ,Brasil

关键词: kinetic-diffusive model;    potassium;    pozzolanicity;   

DOI  :  10.5935/0100-4042.20140123

来源: SciELO

【 摘 要 】

Elephant grass ash (EGA) was produced at 700 °C, with two different treatments: hot water (EGAhw) or acid solution (EGAas). The efficiency of the treatments at removing the potassium oxide was evaluated with the aim of using the EGA as a pozzolanic mineral addition for cement-based composites. Characterizations were carried out by X-ray fluorescence (XRF), X-ray diffraction (XRD), pozzolanic activity by electric conductivity and application of the kinetic-diffusive model. The analysis evidenced that the chemical treatment was more efficient for removing potassium oxide. The pozzolanic activity test and the kinetic parameters for the EGAas indicated that this ash is suitable for cement-based composites.

【 授权许可】

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