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- Title
INFLUÊNCIA DA CONCENTRAÇÃO DE NaOH NA SÍNTESE DE GEOPOLÍMERO COM REAPROVEITAMENTO DE RESÍDUO INDUSTRIAL.
- Authors
da Silva Brito, Woshington; Ferraioli Silva, André Luis Mileo; Svensson, Kristoff; Pöllmann, Herbert; Boca Santa, Rozineide Aparecida Antunes; Gracher Riella, Humberto; da Silva Souza, José Antônio
- Abstract
The molar concentration of the alkaline activator is an important parameter in the synthesis of geopolymer with reuse of fly ash waste and metakaolin. The objective of this work was to evaluate the mechanical performance of the Davidovits (SiO2/Al2O3) geopolymers of 2,65 synthesized with different concentrations of NaOH (5, 15, 30, 40 Molar) in the activator. The geopolymerization reaction was conducted in ambient temperature of 28°C and 15 Molar sodium hydroxide (NaOH) and 10 Molar sodium silicate (Na2SiO3), were used as the activator. The geopolymers synthesized with 5 and 15 molar NaOH showed high compressive strength. Featuring 40.8 MPa with 28 days cure for the 15 molar synthesized geopolymer. The geopolymers synthesized with 30 and 40 molar NaOH showed low compressive strength.
- Subjects
FLY ash; COMPRESSIVE strength; SODIUM hydroxide; SOLUBLE glass; MOLARS; CURING
- Publication
Tecnologia em Metalurgia, Materiais e Mineração, 2019, Vol 16, Issue 1, p45
- ISSN
2176-1515
- Publication type
Article
- DOI
10.4322/2176-1523.20191474