Publications
Petrographic, petrophysical and engineering geological properties of stone materials employed in the Late Baroque of Val di Noto UNESCO Heritage sites (Sicily, Italy)
A comprehensive analysis of the petrographic, petrophysical, and engineering geological properties of stone materials used in the Late Baroque Towns of Val di Noto reveals a unique relationship between local geology and architectural innovation. The study identifies two primary lithotypes—Hyblean limestones (sedimentary) and Etnean lavas (magmatic)—whose distinct characteristics contribute to the towns' bichromy, a hallmark of their post-1693 earthquake reconstruction. Findings highlight how these stones, exposed to atmospheric agents like rain, freeze-thaw cycles, and saline crystallization, undergo weathering processes that threaten their durability. The research provides critical insights into the petrophysical behavior—including porosity, seismic resistance, and deterioration patterns—of these materials, offering a foundational tool for conserving and restoring this UNESCO-listed heritage. Published in Boletín Geológico Y Minero, this work bridges geological science and cultural preservation, emphasizing the importance of material properties in sustaining architectural integrity.
Radon exhalation of untreated and aged Modica stone building material: a case study
A study assessing radon exhalation from Modica stone, a material used in UNESCO-listed Late Baroque Towns of the Val di Noto, revealed that aging through salt crystallization does not significantly alter its radon release. Researchers employed the Closed Chamber Method (CCM) with Durridge Rad7 equipment to measure exhalation rates and applied the Markkanen room model to estimate indoor radon concentrations. Findings suggest potential for developing a systematic strategy to assess radon content in building materials, aiding decision-makers in identifying structures requiring protection measures.
The Long‑Term Legacy of the 1693 Val di Noto Earthquake: Emergency Management, Reconstruction, and Institutional Impact
The 1693 Val di Noto earthquake, the most severe seismic event in Italy's recorded history, reshaped southeastern Sicily but left a complex legacy marked by institutional efficiency and widespread socio-spatial marginalization. While reconstruction efforts achieved remarkable Late Baroque urban renewal and maintained public order, affected populations bore disproportionate social costs, reflecting pre-existing power dynamics and new vulnerabilities. This study reveals that the earthquake did not reset regional history but accelerated existing processes, with ruling classes adapting while marginalized communities faced enduring hardships. Analyzing operational, legislative, administrative, and fiscal mechanisms, the research exposes a stark contrast between effective institutional responses and the abandonment of affected populations, challenging celebratory narratives of post-disaster recovery.
Petrographic, microstructural and petrophysical study of asphaltic limestone employed in the Late Baroque towns of the Val di Noto UNESCO site (south-eastern Sicily)
A petrographic, microstructural, and petrophysical study of asphaltic limestone (pitchstone) from the Late Baroque Towns of the Val di Noto UNESCO site reveals a strong correlation between bitumen impregnation levels and the material's distinctive visual properties as well as its superior physical-mechanical performance. The research employed advanced techniques such as synchrotron X-ray microtomography, ultrasonic testing, gas chromatography, differential scanning calorimetry, and thermogravimetric analysis to investigate two representative pitchstone samples with varying bitumen content. Findings demonstrate that the amount of bitumen impregnation directly influences both the petrofabric and petrophysical properties of the stone, offering insights into its durability and aesthetic characteristics in historic architectural applications.
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