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Heritage Science
Fig. 7 | Heritage Science

Fig. 7

From: The quantification of physico-mechanical properties and durability of onyx-travertines from Santa Ana de los Ríos de Cuenca, Ecuador

Fig. 7

Deterioration tests: a Increase in intraparticular porosity after salt crystallization test in PT, b Increase in porosity between hexagonal calcite crystals after salt crystallization in YT, c Exfoliation of crystals of calcite crystals after freeze–thaw test in GT, d Increase in intraparticular porosity in crystals fiber-radiated with iron oxides after freeze–thaw test in PT, e formation of cavities after the removal of gypsum crusts after acid attack test in WT and f dissolution of calcite crystals with the formation of gypsum after acid attack test in GT

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