Processes and kinetics of mass gain in archeological brick following drying and reheating

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
278 Downloads (Pure)


The mass gain behavior of archeological bricks was examined following drying (130°C)/reheating (500°C) and aging at a range of temperatures (25°C, 35°C, 45°C). For drying or reheating, samples exhibit a two-stage mass gain behavior, the second stage, Stage 2, continuing indefinitely and better described by a t1/n model (1/n=1/6-1/2); a correlation between the 1/n value and the specific surface area/pore volume demonstrates diffusion mechanisms with some pore geometry/morphology dependence. Stage 2 is shown to have an Arrhenius temperature dependence with activation energies of similar orders of magnitude following both drying and reheating. Supported by thermogravimetric-mass spectrometry (TG-MS), Stage 2 is demonstrated as likely due to the recombination of chemisorbed water, previously removed, whereas following reheating due to two components, a chemisorbed component associated with drying and a component associated with rehydroxyls removed at higher temperatures during reheating. Differences between activation energies of chemisorption and rehydroxylation components support this. Evidence for a fundamental compositional relationship between these processes is presented by a strong linear relationship between the drying and reheating mass gain rates. Stage 1, following drying or reheating, is shown to be likely associated with physisorption processes alone.
Original languageEnglish
Number of pages14
JournalJournal of the american ceramic society
Early online date03 Apr 2017
Publication statusEarly online date - 03 Apr 2017


Dive into the research topics of 'Processes and kinetics of mass gain in archeological brick following drying and reheating'. Together they form a unique fingerprint.

Cite this