Fig. 4From: Freeze-thaw durability of repair mortars and porous limestone: compatibility issuesSamples before the frost test (a), after the 5th freeze-thaw cycles (b), after the 10th freeze-thaw cycles (c), after the 15th freeze-thaw cycles (d), after the 20th freeze-thaw cycles (e), and after the 25th freeze-thaw cycles (f)Back to article page