This paper reports significant results about the effects of repeated treatments to protect a mediaevalItalian mortar from capillarity-absorbed water, by using for the treatments, our no-commercial hydro-alcoholic suspensions of calcium hydroxide nanoparticles (nanolime). The mortars samples came fromthe historical site, where preliminary thermographic inspection were performed to detect the dampzones. Before treatments, the samples were analyzed from a mineralogical and chemical point of view,by means of several techniques, as optical microscopy (OM), thin section observations (PFM), porosimet-ric investigations, X-ray fluorescence (XRF), X-ray diffraction (XRD), infrared spectroscopy (FT-IR) andthermal analysis (TG-DTA). The size-grading curve of the aggregate and the binder/aggregate ratio wereexamined too. Then, the efficacy of nanolime protective treatments on this mortar versus the nanolimeconcentrations was investigated. For this aim, capillarity tests as well as porosimetric investigations,before and after the treatments, were performed. The obtained results were remarkably promising bothin terms of the reduction of water absorbed by capillarity (up to 60%) together with an adequate decreaseof porosity (up to 23%), fixing the protective effect of such eco-friendly and very compatible approach.

Eco-compatible protective treatments on an Italian historic mortar (XIV century)

TAGLIERI, GIULIANA;DANIELE, VALERIA;SFARRA, STEFANO;
2017

Abstract

This paper reports significant results about the effects of repeated treatments to protect a mediaevalItalian mortar from capillarity-absorbed water, by using for the treatments, our no-commercial hydro-alcoholic suspensions of calcium hydroxide nanoparticles (nanolime). The mortars samples came fromthe historical site, where preliminary thermographic inspection were performed to detect the dampzones. Before treatments, the samples were analyzed from a mineralogical and chemical point of view,by means of several techniques, as optical microscopy (OM), thin section observations (PFM), porosimet-ric investigations, X-ray fluorescence (XRF), X-ray diffraction (XRD), infrared spectroscopy (FT-IR) andthermal analysis (TG-DTA). The size-grading curve of the aggregate and the binder/aggregate ratio wereexamined too. Then, the efficacy of nanolime protective treatments on this mortar versus the nanolimeconcentrations was investigated. For this aim, capillarity tests as well as porosimetric investigations,before and after the treatments, were performed. The obtained results were remarkably promising bothin terms of the reduction of water absorbed by capillarity (up to 60%) together with an adequate decreaseof porosity (up to 23%), fixing the protective effect of such eco-friendly and very compatible approach.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/113617
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