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RESEARCH PRODUCT
Pore structure and water transfer in Pietra d’Aspra limestone: A neutronographic study
N. RovellaValentina VenutiGiuseppe MontanaLuciana RandazzoF. OttDomenico MajolinoM. F. La RussaVincenzo CrupiGiuseppe PaladiniMichela Riccasubject
Porous limestonesMaterials science010504 meteorology & atmospheric sciencesMineralogy02 engineering and technologylcsh:Technology01 natural sciencesArtificial weathering Capillarity Consolidant Neutron radiography Porous limestones Water kineticslcsh:ChemistryArtificial weatheringWater kineticsConsolidantsConsolidantGeneral Materials Sciencelcsh:QH301-705.5InstrumentationSettore GEO/09 -Georis. Miner.e Appl.Mineral.-Petrogr. per l'Ambi.ed i B.Cult.0105 earth and related environmental sciencesFluid Flow and Transfer Processeslcsh:TArtificial weathering; Capillarity; Consolidants; Neutron radiography; Porous limestones; Water kineticsProcess Chemistry and TechnologyNeutron imagingGeneral Engineering021001 nanoscience & nanotechnologylcsh:QC1-999Computer Science ApplicationsPorous limestonelcsh:Biology (General)lcsh:QD1-999Water transferlcsh:TA1-2040CapillarityNeutron radiographyneutron radiography; porous limestones; consolidants; water kinetics; artificial weathering; capillaritylcsh:Engineering (General). Civil engineering (General)0210 nano-technologylcsh:Physicsdescription
Neutron radiography (NR) was here applied to study the effects of two different commercially available consolidants on the water absorption properties in a particular type of limestone (biocalcarenite), known as Pietra d’Aspra stone, which is one of the most extensively used lithotypes in Sicilian Baroque buildings. Our attention was mainly focused on the evaluation, using a fast and nondestructive visualization of water motion through capillarity, of the effectiveness of such layers as consolidating agents in view of preserving and maintaining both old and modern structures. The biocalcarenite was treated with nanosilica (Nano Estel®) and nanolime (CaLoSil®) by brushing it until full saturation, and then artificially weathered by salt crystallization and temperature/relative humidity jumps. Liquid distribution and height of the water front were monitored as a function of time. Significant differences in the water suction behavior among all the investigated samples were highlighted, which allowed us to gain insight into the coating/substrate interaction mechanisms which regulate the fluid mobility inside the porous network of the limestone.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-26 |