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Theuse of tg to measure different concentrations of lime in non-hydraulic limemortars
Authors:R. M. H. Lawrence  T. J. Mays  P. Walker  D. D’Ayala
Affiliation:(1) Department of Architecture and Civil Engineering, University of Bath, Bath, United Kingdom, BA2 7AY;(2) Department of Chemical Engineering, University of Bath, Bath, United Kingdom, BA2 7AY
Abstract:A high speed method of thermal analysis was developed to allow the carbonation profile of lime mortars to be followed within a convenient time-frame. The loss in mass on heating, up to 700°C, of lime/sand mixtures of different proportions was related to the known quantity of lime in each mixture. It was shown that a heating rate of 50°C min–1 produced data which had a very high correlation with known quantities of Ca(OH)2. Thismethod can be used to measure the extent of carbonation at varying depths through a limemortar. This can be repeated at intervals to give an insight into the shape and extent of the carbonation front as it develops over time.
Keywords:carbonation front  lime mortar  thermal analysis
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