Determination of carbonation profiles in non-hydraulic lime mortars using thermogravimetric analysis

R.M.H. Lawrence, T J Mays, P Walker, D D'Ayala

Research output: Contribution to journal › Article

43 Citations (Scopus)

Abstract

The carbonation profile of material taken at various depths in a lime mortar specimen has been detd. at different times from manuf. using a novel, high-speed thermogravimetric anal. (TGA) method. While conventional phenolphthalein staining suggests a sharp boundary between carbonated and non-carbonated regions, the new TGA technique shows that up to 15% (wt./wt.) of portlandite remains uncarbonated at the exterior of the mortar and that the extent of carbonation declines linearly over up to 15 mm into the interior. The technique demonstrates the possibility of identifying the presence of Liesegang patterns by measuring variations in the concn. of Ca(OH)2 through the depth profile. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)179-189
Number of pages11
JournalThermochimica Acta
Volume444
Issue number2
DOIs
Publication statusPublished - 2006

Fingerprint

Carbonation
calcium oxides
Mortar
Lime
Thermogravimetric analysis
Phenolphthalein
staining
profiles
high speed
lime

Keywords

  • USES (Uses) (detn. of carbonation profiles in non-hydraulic lime mortars using thermogravimetric anal.)
  • Mortar
  • lime mortar carbonation profile thermogravimetric analysis
  • unclassified)
  • PEP (Physical
  • Thermogravimetric analysis (detn. of carbonation profiles in non-hydraulic lime mortars using thermogravimetric anal.)
  • Carbonation
  • CPS (Chemical process)
  • Lime Role
  • PROC (Process)
  • engineering or chemical process)
  • NUU (Other use

Cite this

Determination of carbonation profiles in non-hydraulic lime mortars using thermogravimetric analysis. / Lawrence, R.M.H.; Mays, T J; Walker, P; D'Ayala, D.

In: Thermochimica Acta, Vol. 444, No. 2, 2006, p. 179-189.

Research output: Contribution to journal › Article

Lawrence, RMH, Mays, TJ, Walker, P & D'Ayala, D 2006, 'Determination of carbonation profiles in non-hydraulic lime mortars using thermogravimetric analysis', Thermochimica Acta, vol. 444, no. 2, pp. 179-189. https://doi.org/10.1016/j.tca.2006.03.002
Lawrence RMH, Mays TJ, Walker P, D'Ayala D. Determination of carbonation profiles in non-hydraulic lime mortars using thermogravimetric analysis. Thermochimica Acta. 2006;444(2):179-189. https://doi.org/10.1016/j.tca.2006.03.002
Lawrence, R.M.H. ; Mays, T J ; Walker, P ; D'Ayala, D. / Determination of carbonation profiles in non-hydraulic lime mortars using thermogravimetric analysis. In: Thermochimica Acta. 2006 ; Vol. 444, No. 2. pp. 179-189.
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AB - The carbonation profile of material taken at various depths in a lime mortar specimen has been detd. at different times from manuf. using a novel, high-speed thermogravimetric anal. (TGA) method. While conventional phenolphthalein staining suggests a sharp boundary between carbonated and non-carbonated regions, the new TGA technique shows that up to 15% (wt./wt.) of portlandite remains uncarbonated at the exterior of the mortar and that the extent of carbonation declines linearly over up to 15 mm into the interior. The technique demonstrates the possibility of identifying the presence of Liesegang patterns by measuring variations in the concn. of Ca(OH)2 through the depth profile. [on SciFinder (R)]

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KW - PEP (Physical

KW - Thermogravimetric analysis (detn. of carbonation profiles in non-hydraulic lime mortars using thermogravimetric anal.)

KW - Carbonation

KW - CPS (Chemical process)

KW - Lime Role

KW - PROC (Process)

KW - engineering or chemical process)

KW - NUU (Other use

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