Palazzo Minotto - Venice

Westox Cocoon Palazzo Minotto

The Palazzo Barbarigo Minotto (also called Palazzo Minotto Barbarigo) is a 15th-century palace on the Grand Canal in Venice, northern Italy, next to the much larger Palazzo Corner.

Built in the Venetian Gothic style, it was originally two palaces, Palazzo Barbarigo and Palazzo Minotto, later joined together. The Barbarigo palace was owned by the Barbarigo family for several centuries and was the birthplace of Gregorio Barbarigo, who once refused the Papal Crown. It was later owned by the Minotto and Martinengo families.

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The Test

Two masonry surfaces, one of brick and another of brick wall covered with venetian "Marmorino" plaster render on the first floor of Palazzo Minotto in Venice, were chosen to assess the extraction capabilities of soluble salts by the "Westox Cocoon" poultice produced by Westlegate Pty. Revesby, Australia, in comparison to the standard system used in current practice composed of a mixture of Arbocel + Sepiolite.

The performance of the poultices was evaluated by determining the salt content in the poultice materials (direct extractive capacity) and in the treated wall surfaces (indirect extractive capacity) by comparison before and after two poulticing applications. The salt content of the experimental areas was
measured in samples taken at various depths with a drill.

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The Result

The results have shown, in samples taken at various depths after the second application, a very similar residual presence of salts both in the brick and in the Marmorino for the two treatments. Instead, the situation after the first application shows a different behaviour depending on the type of poultice used.

The walls treated with Westox Cocoon show a decrease in the saline content in the most superficial layers while those treated with Arbocel + Sepiolite show an increase in saline content in depth as if this poultice summoned the salts from within the wall without being able to absorb them. In regards to
the extraction capacities, this is significantly more constant for the Westox Cocoon poultice, which shows to be able to extract a good amount of salt after the first poulticing. This amount increases with the second application.

The Arbocel + Sepiolite poultice seems, initially after the first application, to summon the salts from within the wall without being able to extract them. For this poultice these last results indicate clearly, more so than for Westox Cocoon, the need for least two applications in sequence.