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Figure 1
Photographs of the damaged area on the interior wall: (a) the crack was initially observed, (b) the same area after partial removal of the black substance, (c) seven months later, and (d) the same area after the expanded mortar. |
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Figure 1
Photographs of the damaged area on the interior wall: (a) the crack was initially observed, (b) the same area after partial removal of the black substance, (c) seven months later, and (d) the same area after the expanded mortar. |