Microstructure and water absorption of ancient concrete from Pompeii: An integrated synchrotron microtomography and neutron radiography characterization

There is renewed interest in using advanced techniques to characterize ancient Roman concrete. In the present work, samples were drilled from "Hospitium" Pompeii and analyzed by synchrotron microtomography (uCT) neutron radiography study how microstructure, including presence of induced cracks, affects their water adsorption. The distribution absorptivity quantified radiography. 3D crack propagation, pore size orientation, tortuosity, connectivity uCT results imaging methods. concrete characterization also included classical methods (e.g., differential thermal-thermogravimetric, X-ray diffractometry, scanning electron microscopy). Ductile fracture patterns observed once cracks introduced. When compared Portland cement mortar/concrete, had relatively high porosity, low connectivity, similar coefficient capillary penetration. addition, permeability was predicted models based on percolation theory structure data evaluate fluid transport properties.