TY  - JOUR
AU  - Ševčík, Radek
AU  - Viani, Alberto
AU  - Mancini, Lucia
AU  - Appavou, Marie-Sousai
AU  - Machová, Dita
TI  - Investigation of nano-microstructural changes in Maastricht limestone after treatment with nanolime suspension
JO  - Applied physics / A
VL  - 126
IS  - 5
SN  - 1432-0630
CY  - New York
PB  - Springer
M1  - FZJ-2020-04859
SP  - 367
PY  - 2020
AB  - Nanolimes are dispersions of nanosized Ca(OH)2 particles in alcohols often used for the consolidation of various types of cultural heritage objects. The consolidation effect is based on the transformation of Ca(OH)2 into CaCO3 phases during carbonation process. The detection of microstructural changes consequent to a consolidating treatment (essential to evaluate its effectiveness) was approached adopting the innovative combination of two advanced techniques, covering a range in pore size from the nanometric to the millimetric scale: small-angle neutron scattering (SANS) and synchrotron X-ray micro-computed tomography (µ-CT). The changes in the 3D microstructure of samples of Maastricht limestone, a well-known weak stone material considered as a sort of ‘standard’ in cultural heritage conservation studies, pure and treated with nanolime dispersions, have been described in a fully non-invasive fashion, overcoming the limitation of previous approaches. The application of nanolime resulted to have a limited positive effect in reducing the fine porosity. Its time evolution was attributed to the progress of the carbonation reaction. On the contrary, the treatment produced positive effects on the porosity in the size range covered with µ-CT, reducing the pore accessibility between 30 and 65 µm, suggesting an improvement of the mechanical properties. The combined use of SANS and µ-CT represents and novel methodological approach in support of cultural heritage conservation works.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000528557000001
DO  - DOI:10.1007/s00339-020-03567-6
UR  - https://juser.fz-juelich.de/record/888341
ER  -