Journal of Thermal Analysis and Calorimetry

, Volume 110, Issue 1, pp 37–41 | Cite as

Dehydration investigations of a refractory concrete using DTA method

  • N. Obradović
  • A. Terzić
  • Lj. Pavlović
  • S. Filipović
  • V. Pavlović
Article

Abstract

The base mix refractory concrete is corundum-based, containing corundum as refractory aggregate and CAC as hydraulic binder, with a spinel as an additive. The authors investigated the dehydration reactions which occur from the moment when water is added (at the beginning of components mixing), to the moment when installed refractory concrete lining is put into the service. Sintering process kinetic of low-cement content refractory concrete was investigated by means of differential thermal analysis at four different heating rates (5, 10, 20, and 30 °C/min). Thus, temperature was increased from 20 to 1100 °C. It was noticed that first dehydration step occurs at lower temperatures, indicating at a desorption of physically adsorbed and interlayer water molecules. Second dehydration step, at higher temperatures is due to dehydroxylation of the lattices and decomposition of the interlayer anions.

Keywords

Sintering kinetics DTA Refractory concrete 

References

  1. 1.
    Lee WE, Viera W, Zhang S, et al. Castable refractory concretes. Int Mat Rev. 2001;46:145–67.CrossRefGoogle Scholar
  2. 2.
    Compas A, Mohmel S, Gebner W, et al. The Behaviour of CA/CA2 Cements During. Hydration and Thermal Treatment. In: Proceedings of UNITECR’97, New Orleans; 1997. p. 1273–82.Google Scholar
  3. 3.
    Terzic A, Pavlovic Lj. Application of results of non-destructive testing methods in investigation of microstructure of refractory concrete. J Mater Civ Eng. 2010;22:853–8.CrossRefGoogle Scholar
  4. 4.
    Tongsheng Z, Qijun Y, Jiangxiong W, Peng G, Pingping Z. Study on optimization of hydration process of blended cement. J Therm Anal Calorim. doi:10.1007/s10973-011-1531-8.
  5. 5.
    Brown PW, Shi D, Skalny JP. Porosity/permeability relationships concrete microstructure porosity and permeability. Washington, DC: Strategic Highway Research Program, NRC; 1993. p. 43–75.Google Scholar
  6. 6.
    Vedalakshmi R, Sundara Raj A, Srinivasan S, Ganesh Babu K. Quantification of hydrated cement products of blended cements in low and medium strength concrete using TG and DTA technique. Thermochim Acta. 2003;407:49–60.CrossRefGoogle Scholar
  7. 7.
    Ukrainczyk N, Matusinovic T, Kurajica S, Zimmermann B, Sipusic J. Dehydration of a layered double hydroxide-C2AH8. Thermochim Acta. 2007;464:7–15.CrossRefGoogle Scholar
  8. 8.
    Pacewska B, Nowacka M, Wilinska I, Kubissa W, Antonovich V. Studies on the influence of spent FCC catalyst on hydration of calcium aluminate cements at ambient temperature. J Therm Anal Calorim. 2011;105:129–40.CrossRefGoogle Scholar
  9. 9.
    Li D, Chen S, Wang D, et al. Thermo-analysis of nanocrystalline TiO2 ceramics during the whole sintering process using differential scanning calorimetry. Ceram Int. 2010;36:827–9.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  • N. Obradović
    • 1
  • A. Terzić
    • 2
  • Lj. Pavlović
    • 2
  • S. Filipović
    • 1
  • V. Pavlović
    • 1
  1. 1.Institute of Technical Sciences-SASABelgradeSerbia
  2. 2.Institute for Technology of Nuclear and Other Raw MaterialsBelgradeSerbia

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