The activities of the Stone section can be divided into two areas:
• The identification and the search of the origin of the stones, advice for the use of substitute stones
• The conservation of masonry, of monumental sculptures, of mortars in their various types of implementation (laying, rejointing, repair, injection mortar, coating). The conservation problems that are most often dealt with concern the diagnosis of alterations, cleaning, desalination, consolidation, the protection of stone, the casting, as well as the characterisation of the pathologies and the solutions to be brought when confronted to stone / repair mortar or stone / stone incompatibilities in a given architectural environment.
Our research focuses on the improvement of products and stone treatment processes, whether in the context of monuments or museums. The work varies greatly, and includes the following domains: the incidence of a stone’s capillary properties on its resistance to corrosion; the role of sulfates in stone deterioration; the durability of stone protection products; the efficiency of treatments for salt-contaminated masonry; the optimization of desalination compresses; the design of a salt-based accelerated-aging method; and the design of more compatible adhesives for the reassembly of fractured stones.