This article examines a clay roof tile frostproof ness test, carried out on a specific production batch through lab and in situ tests. The research has been made on ltalian roofing tiles, made using a calcareous type of clay which entails difficult control of main parameters. lt is recommended to add to the mix a greater amount of lean substances with the purpose of reducing the variability of physical and mechanical properties. Permeability and frostproof ness are two fundamental characteristics of clay roofing products, strictly related to the structure of the ceramic body and in particular, to the open porosity of the fired product. A product with a low open porosity cannot but be impermeable and frostproof.
展开▼
