Nanoparticles for conservation of bio-calcarenite stone
Source abstract
Abstract
In the present study, the consolidation effectiveness of some inorganic nanoparticles dispersions (silica, calcium hydroxide, and strontium hydroxide) has been evaluated when applied on a very porous stone substrate, i.e., Lecce stone. The strengthening effect of the nanoparticle-based treatments was compared to that exhibited by the well-known consolidant tetraethoxysilane. Ca(OH)2 and Sr(OH)2 nanoparticles were prepared in laboratory and characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), dynamic light scattering (DLS), and Fourier transform infrared spectroscopy (FTIR). The kinetic stability of nanoparticles dispersions was determined by UV-vis spectrophotometric studies. Moreover, the study of the nanolime carbonatation process was carried out using FTIR spectroscopy. Distribution of the applied product into the stone substrate was examined by SEM-EDS. The chemical weathering effect of salt crystallization of the treated specimens was evaluated by performing the dry weight loss (DWL) test. All the results suggested that Ca(OH)2 and Sr(OH)2 nanoparticles, applied as 2-propanol dispersions, display some good properties as consolidating agents for a very porous bio-calcarenite such as Lecce stone.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Building materials and conservation · Concrete and Cement Materials Research · Cultural Heritage Materials Analysis
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