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Figure 4 | Heritage Science

Figure 4

From: Specialist ‘restoration mortars’ for stone elements: a comparison of the physical properties of two stone repair materials

Figure 4

Carbonation rates of restoration mortars. Carbonation depth was determined by application of Phenolphthalein indicator; dark areas represent uncarbonated material. Numbers below the inset images indicate the average depth of carbonation (in mm). Numbers on the line graph indicate the rate of carbonation (in mm/day) between each testing phase.

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