Small-angle neutron scattering (SANS) measurements have been carried out on different marble and limestone samples, of relevance to cultural heritage safeguard, to investigate the micropore distribution in the size range between 10 and 1000 ≈. Different varieties of marbles have been studied using a CaCO3 single crystal, pore-free, as a reference. A series of red scaglia limestone samples has also been tested obtaining for this material well reproducible results. Namely identical SANS cross-sections are found for specimens issued from a modern quarry and for samples issued from an historical building. Furthermore, the micropore volume distribution functions obtained by Fourier transformation of the SANS data are in accordance with porosimetry results for pore sizes larger than 500 ≈ approximately. The results of SANS measurements carried out to try and distinguish close and open microporosity are also reported.
Non-Destructive Investigation of Microporosity in Marbles by means of Small Angle Neutron Scattering
Valli, M.;Coppola, R.
2002-06-01
Abstract
Small-angle neutron scattering (SANS) measurements have been carried out on different marble and limestone samples, of relevance to cultural heritage safeguard, to investigate the micropore distribution in the size range between 10 and 1000 ≈. Different varieties of marbles have been studied using a CaCO3 single crystal, pore-free, as a reference. A series of red scaglia limestone samples has also been tested obtaining for this material well reproducible results. Namely identical SANS cross-sections are found for specimens issued from a modern quarry and for samples issued from an historical building. Furthermore, the micropore volume distribution functions obtained by Fourier transformation of the SANS data are in accordance with porosimetry results for pore sizes larger than 500 ≈ approximately. The results of SANS measurements carried out to try and distinguish close and open microporosity are also reported.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
