Browsing by Author "Gómez-Villalba, L.S."

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    Construction and Building Materials Electroprecipitation of inorganic borates, with different solubility, within monumental
    (Construction and building materials, 2023) Feijoo, Jorge; Gómez-Villalba, L.S.; Ríos, A. de los; Fort, R.
    Biodeterioration is a serious threat to the preservation of cultural heritage. Currently, the chemical treatments used to combat it must fulfil a series of restrictions to ensure that they are not harmful to humans or the environment. Borates satisfy these conditions but due to its high degree of leaching its application is limited to indoor areas. The use of electroprecipitation may to increase the range of applicability by allowing to precipitate, along the entire section of the stony materials, of a mixture of boron salts with different solubility (zinc, magnesium, and sodium borates) to cover a wide range of moisture conditions. The results obtained show that electroprecipitation not only increases the penetration depth of boron compounds but also allows the formation of compounds of different solubility, which allows the treatment to last over time. Furthermore, the treatment increased the mechanical properties and reduced the porosity of the stones treated, all without causing significant aesthetic changes.
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    Simultaneous desalination and consolidation treatment through the application of electrokinetic techniques
    (Construction and building materials, 2023) Feijoo, Jorge; Gómez-Villalba, L.S.; Fort, R.; Rabanal, M.E.
    The vast majority of building materials that are heavily affected by salts require desalination and subsequent consolidation treatments. This double intervention entails a risk associated with the loss of material due to continuous contact with the affected surface. This study evaluates the effectiveness of an electrokinetic process of simultaneous desalination-consolidation of two types of stones (dolostone and limestone). The results show that it is possible to reduce the salts up to percentages of 100% and at the same time to fill the pores and fractures with insoluble compounds compatible with the materials to be treated, such as calcium-magnesium carbonates.