Economic and Environmental Geology

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Table. 5.

Table. 5.

Thermal characteristics of the roof tiles.

Original roof tiles Deformed roof tiles
Surface color yellowish brown, yellowish red reddish brown, bluish gray
Cross section(color) single sandwich structure
Water absorption mean: 14.92% mean: 6.34%
Specific gravity 1.67~2.01 1.04~1.40 / 1.78~2.35
Mineral quartz, feldspars, micas, amphibole, etc. quartz, feldspars, mullite, hercynite, etc.
Vitrification structure NV, IV EV, CV
Firing atmosphere oxidation / reduction oxidation / reduction
Firing temperature 700~900℃ 1,000~1,200℃
Econ. Environ. Geol. 2021;54:671-87 https://doi.org/10.9719/EEG.2021.54.6.671
© 2021 Econ. Environ. Geol.