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  • 1 Faculty of Chemistry, Sofia University “St. Kliment Ohridski”, 1 J. Bourchier blvd, 1164, Sofia, Bulgaria
  • | 2 University of Architecture, Civil Engineering and Geodesy, Building and Insulation Materials, 1 Hristo Smirnenski blvd, 1164, Sofia, Bulgaria
  • | 3 Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, “Acad. G. Bonchev” str., Block 107, 1113, Sofia, Bulgaria
  • | 4 University of Chemical Technology and Metallurgy, 8 Kl. Ohridski blvd, 1756, Sofia, Bulgaria
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Abstract

The kinetics of pozzolanic reaction metakaolin–lime is studied in the present work. Metakaolin is prepared by calcination of enriched kaolin (deposit “Senovo”, Bulgaria) at temperature of 830 ± 10 °C in a labscale muffle oven. The reaction is performed in intensively stirred water suspension at different temperatures in the range 20–100 °C. The kinetics is analyzed by comparing the experimental data with theoretical curves, derived according to appropriate kinetic and diffusion models taking into account the grain size distribution of metakaolin. The macroscopic mechanism and activation energy of the reaction are determined. It is found, that the activation energy decreases gradually from 71 to 45 kJ/mol[Ca(OH)2] with the increase of the reaction degree from 0.2 up to 0.6, respectively, which is a characteristic for transition regime reactions.

  • 1. Siddique, R, Klaus, J. Influence of metakaolin on the properties of mortar and concrete: a review. Appl Clay Sci. 2009;43:392400. .

  • 2. Cabrera, J, Rojas, MF. Mechanism of hydration of the metakaolin–lime–water system. Cem Concr Res. 2001;31:177182. .

  • 3. Sanches de Rojas, MI, Cabrera, J. The effect of temperature on the hydration rate and stability of the hydration phases of metakaolin–lime–water systems. Cem Concr Res. 2002;32:133138. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 4. Shi, C, Day, RL. Pozzolanic reaction in the presence of chemical activators. Part I. Reaction kinetics. Cem Concr Res. 2000;30:5158. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 5. Moropoulou, A, Bakolas, A, Aggelakopoulou, E. Evaluation of pozzolanic activity of natural and artificial pozzolans by thermal analysis. Thermochim Acta. 2004;420:135140. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 6. Wild, S, Knatib, JM. Portlandite consumption in metakaolin cement pastes and mortars. Cem Concr Res. 1997;27: 1 137146. .

  • 7. Oriol, M, Pera, J. Pozzolanic activity of metakaolin under microwave treatment. Cem Concr Res. 1995;25: 2 265270. .

  • 8. Ninov, J, Donchev, I, Dimova, L. On the kinetics of pozzolanic reaction in the system kaolin–lime–water. J Therm Anal Calorim. 2010;101:107112. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 9. USA Patent No 5792251—Method of producing metakaolin/Aug. 11. 1998:13.

  • 10. Brindley, GW, Nakahara, M. The kaolinite–mullite reaction series: metakaolin. J Am Cer Soc. 1959;42: 7 314318. .

  • 11. Ninov, J, Donchev, I. Lime stabilization of clay from the “Mirkovo” deposit. (I) Kinetics and mechanism of the processes. J Therm Anal Calorim. 2008;91: 2 487490. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 12. Berg, LG. Introduction in thermography. 1 Moscow: Publishing House of the Academy of Sciences of the USSR; 1961 193195.

  • 13. Ambroise, J, Murat, M, Pera, J. Hydratation reaction and hardening of calcined clays and related minerals. V. Extentsion of the research and general conclusions. Cem Concr Res. 1985;2:261268. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 14. Kurtis KE , Metakaolin. CEE 8813. Mater Sci Concr. 2007, p. 7. http://people.ce.gatech.edu/∼kk92/mkgrad.pdf.

  • 15. Largent G . Estimation de l’activite pouzzlanique. Bull Liaison Lab P et Ch. Ref 2143, janv-fevr 1978;93:61–65.

  • 16. Bai, J, Wild, S. Investigation of the temperature change and heat evolution of mortar incorporating PFA and metakaolin. Cem Concr Compos. 2002;24: 2 201209. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 17. Tretjakov, Ju. Solid-phase reactions. 1 Moskow: Chimia; 1978 174188.

  • 18. Frias, M, Villar-Cociña, E, Rojas, M, Valencia-Morales, E. The effect that different pozzolanic activity methods has on the kinetic constants of the pozzolanic reaction in sugar cane straw-clay ash/lime systems: application of a kinetic-diffusive model. Cem Concr Res. 2005;35:21372142. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 19. Villar-Cociña, E, Valencia-Morales, E, Gonzales-Rodriguez, R, Hernandez-Ruiz, J. Kinetics of the pozzolanic reaction between lime and sugar cane straw ash by electrical conductivity measurement: a kinetic-diffusive model. Cem Concr Res. 2003;33:517524. .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 20. Delmon, B. Kinetics of heterogenous rections. Moskow: Mir; 1972.

  • 21. Kapur, PC. Kinetics of solid-state reactions of particulate ensembles with size distributions. J Am Cer Soc. 1972;56: 2 7981. .

    • Crossref
    • Search Google Scholar
    • Export Citation

Manuscript Submission: HERE

  • Impact Factor (2019): 2.731
  • Scimago Journal Rank (2019): 0.415
  • SJR Hirsch-Index (2019): 87
  • SJR Quartile Score (2019): Q3 Condensed Matter Physics
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • Impact Factor (2018): 2.471
  • Scimago Journal Rank (2018): 0.634
  • SJR Hirsch-Index (2018): 78
  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)