Inorganic-mineral treatments are commonly applied to decayed stone substrates in order to slow down the decay processes, through the partial transformation of the original stone material into newly-formed crystalline phases. The purpose of this study is to explore the effects induced by a promising consolidating treatment based on diammonium hydrogenphosphate (DAP) solutions on Noto limestone, a porous carbonatic matrix used as ornamental stone in the south of Italy. The research findings, obtained combining water absorption by capillarity measurements, mercury intrusion porosimetry (MIP) and synchrotron radiation X-ray micro-computed tomography (SR-μCT), demonstrate that the DAP consolidation induces microstructural modifications of the stone in terms of porosity and pore size distribution, changing the capillarity absorption values and decreasing the sorptivity speed. This study paves the way to a deeper investigation of the effects induced by a wider range of conservation treatments to the 3D microstructural features of porous geomaterials, by using an innovative multiscale approach.

Consolidation of building materials with a phosphate-based treatment : effects on the microstructure and on the 3D pore network / E. Possenti, C. Colombo, C. Conti, N. Marinoni, M. Merlini, R. Negrotti, M. Realini, G.D. Gatta. - In: MATERIALS CHARACTERIZATION. - ISSN 1044-5803. - 154(2019 Aug), pp. 315-324.

Consolidation of building materials with a phosphate-based treatment : effects on the microstructure and on the 3D pore network

N. Marinoni;M. Merlini;G.D. Gatta
Ultimo
Supervision
2019

Abstract

Inorganic-mineral treatments are commonly applied to decayed stone substrates in order to slow down the decay processes, through the partial transformation of the original stone material into newly-formed crystalline phases. The purpose of this study is to explore the effects induced by a promising consolidating treatment based on diammonium hydrogenphosphate (DAP) solutions on Noto limestone, a porous carbonatic matrix used as ornamental stone in the south of Italy. The research findings, obtained combining water absorption by capillarity measurements, mercury intrusion porosimetry (MIP) and synchrotron radiation X-ray micro-computed tomography (SR-μCT), demonstrate that the DAP consolidation induces microstructural modifications of the stone in terms of porosity and pore size distribution, changing the capillarity absorption values and decreasing the sorptivity speed. This study paves the way to a deeper investigation of the effects induced by a wider range of conservation treatments to the 3D microstructural features of porous geomaterials, by using an innovative multiscale approach.
Synchrotron radiation X-ray micro-computed tomography; Natural stone material; Inorganic consolidant; Cultural heritage; Mercury intrusion porosimetry
Settore GEO/09 - Georisorse Miner.Appl.Mineral.-Petrogr.per l'amb.e i Beni Cul
Settore GEO/06 - Mineralogia
ago-2019
Article (author)
File in questo prodotto:
File Dimensione Formato  
MaterialsCharact2019.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 3.2 MB
Formato Adobe PDF
3.2 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
2019 Consolidation of building materials.pdf

Open Access dal 01/09/2021

Descrizione: Versione accettata dall'editore per la stampa
Tipologia: Post-print, accepted manuscript ecc. (versione accettata dall'editore)
Dimensione 11.22 MB
Formato Adobe PDF
11.22 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/651307
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 11
social impact