An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature
Joint Authors
Brito, Woshington S.
Mileo Ferraioli Silva, André L.
Boca Santa, Rozineide A. A.
Svensson, Kristoff
Antônio da Silva Souza, José
Pöllmann, Herbert
Gracher Riella, Humberto
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-06-13
Country of Publication
Egypt
No. of Pages
6
Abstract EN
Sustainable civil construction in the future, besides having low energy consumption and greenhouse gas emissions, must also adopt the principle of reusing wastes generated in the production chain that impact the environment.
The aluminum production chain includes refining using the Bayer process.
One of the main wastes produced by the Bayer process that has an impact on the environment is fly ash.
Geopolymers are cementitious materials with a three-dimensional structure formed by the chemical activation of aluminosilicates.
According to studies, some are proving to be appropriate sources of Al and Si in the geopolymerization reaction.
The research reported here sought to assess the possibility of reusing fly ash characteristic of the operational temperature and pressure conditions of Bayer process boilers in geopolymer synthesis.
Geopolymerization reaction was conducted at an ambient temperature of 30°C, and the activator used was sodium hydroxide (NaOH) 15 molar and sodium silicate (Na2SiO3) alkaline 10 molar.
Fly ash and metakaolin were used as sources of Al and Si.
XRD, XRF, and SEM Techniques were used for characterizing the raw materials and geopolymers.
As a study parameter, the mole ratios utilized followed data from the literature described by Davidovits (year), so that the best results of the geopolymer samples were obtained in the 2.5 to 3.23 range.
Resistance to mechanical compression reached 25 MPa in 24 hours of curing and 44 MPa after 28 days of curing at ambient temperature.
American Psychological Association (APA)
Brito, Woshington S.& Mileo Ferraioli Silva, André L.& Boca Santa, Rozineide A. A.& Svensson, Kristoff& Antônio da Silva Souza, José& Pöllmann, Herbert…[et al.]. 2018. An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-6.
https://search.emarefa.net/detail/BIM-1119631
Modern Language Association (MLA)
Brito, Woshington S.…[et al.]. An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-6.
https://search.emarefa.net/detail/BIM-1119631
American Medical Association (AMA)
Brito, Woshington S.& Mileo Ferraioli Silva, André L.& Boca Santa, Rozineide A. A.& Svensson, Kristoff& Antônio da Silva Souza, José& Pöllmann, Herbert…[et al.]. An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-6.
https://search.emarefa.net/detail/BIM-1119631
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119631