COMPORTAMENTO REOLÓGICO DE COMPÓSITOS GEOPOLIMÉRICOS A BASE DE METACAULIM COM A INCORPORAÇÃO DE NANOTUBOS DE CARBONO

Authors

  • Laura Silvestro UTFPR - Guarapuava
  • Madeleing Taborda Barraza
  • Geannina Lima
  • Artur Spat Ruviaro
  • Philippe Jean Paul Gleize

Keywords:

geopolímero, metacaulim, nanotubos de carbono, reologia, reometria rotacional

Abstract

Os geopolímeros vem recebendo grande atenção e são considerados potenciais materiais alternativos ao cimento Portland. Entretanto, os estudos que avaliaram as propriedades reológicas de compósitos geopoliméricos com a incorporação de nanotubos de carbono (NTC) ainda são escassos. Diante disso, este estudo teve por objetivo avaliar o comportamento reológico através do ensaio de reometria rotacional de pastas de geopolímero produzidas com dos tipos de metacaulim (MK1 e MK2) e teor de NTC de 0,2% em relação a massa de precursor. Um estudo preliminar mostrou que o modelo de Casson foi o que apresentou o melhor ajuste aos dados reológicos para ambos os tipos de precursores avaliados. Além disso, verificou-se que a incorporação de NTC não afetou significativamente a tensão de escoamento dos compósitos. Em contrapartida, os NTC ocasionaram um aumento de 18,4% na viscosidade da matriz composta pelo MK1.

References

ALVI, M. A. A.; KHALIFEH, M.; AGONAFIR, M. B. Effect of nanoparticles on properties of geopolymers designed for well cementing applications. Journal of Petroleum Science and Engineering, v. 191, p. 107128, 2020.

DA LUZ, G. et al. Effect of pristine and functionalized carbon nanotubes on microstructural, rheological, and mechanical behaviors of metakaolin-based geopolymer. Cement and Concrete Composites, v. 104, n. July 2018, p. 103332, 2019.

FERNÁNDEZ-JIMÉNEZ, M. C. A. P. A.; BANFILL, P. F. G.; AL, S. Alkali activated fly ash : effect of admixtures on paste rheology. p. 447–455, 2009.

JIANG, S. et al. Rheological properties of cementitious composites with nano/fiber fillers. Construction and Building Materials, v. 158, p. 786–800, 2018.

JINDAL, B. B.; SHARMA, R. The effect of nanomaterials on properties of geopolymers derived from industrial by-products: A state-of-the-art review. Construction and Building Materials, v. 252, p. 119028, 2020.

JITHENDRA, C.; DALAWAI, V. N.; ELAVENIL, S. Effects of metakaolin and sodium silicate solution on workability and compressive strength of sustainable Geopolymer mortar. Materials Today: Proceedings, v. 51, p. 1580–1584, 2022.

PARK, S. et al. Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength. Journal of Materials Research and Technology, v. 17, p. 1582–1597, 2022.

REIS, D. C. et al. Potential CO2 reduction and uptake due to industrialization and efficient cement use in Brazil by 2050. Journal of Industrial Ecology, v. 25, n. 2, p. 344–358, 2021.

RIFAAI, Y. et al. Rheology of fly ash-based geopolymer: Effect of NaOH concentration. Construction and Building Materials, v. 223, p. 583–594, 2019.

SHOBEIRI, V. et al. A comprehensive assessment of the global warming potential of geopolymer concrete. Journal of Cleaner Production, v. 297, p. 126669, 2021.

SILVESTRO, L. et al. Effect of Multiwalled Carbon Nanotube Functionalization with 3-Aminopropyltriethoxysilane on the Rheology and Early-Age Hydration of Portland Cement Pastes. Journal of Materials in Civil Engineering, v. 34, n. 8, p. 1–12, 2022.

SIQUEIRA, J. E. L. DE; GLEIZE, P. J. P. Effect of carbon nanotubes sonication on mechanical properties of cement pastes. Revista IBRACON de Estruturas e Materiais, v. 13, n. 2, p. 455–463, 2020.

Published

2024-01-15

How to Cite

Silvestro, L., Taborda Barraza , M., Lima, G., Spat Ruviaro, A., & Jean Paul Gleize, P. (2024). COMPORTAMENTO REOLÓGICO DE COMPÓSITOS GEOPOLIMÉRICOS A BASE DE METACAULIM COM A INCORPORAÇÃO DE NANOTUBOS DE CARBONO. SIMPÓSIO BRASILEIRO DE CIÊNCIA DO CIMENTO, 1(00), 1–5. Retrieved from https://eventos.antac.org.br/index.php/sbcc/article/view/3586

Similar Articles

1 2 > >> 

You may also start an advanced similarity search for this article.