Characterization of stone deterioration on buildings

Abstract

In this chapter the main methods applied to the characterization of stone deterioration on buildings and art objects are presented. The text begins with the classification of weathering forms. A short, illustrated glossary following the recent proposal of the ICOMOS (International Council on Monuments and Sites) is given, and the techniques and problems of mapping are discussed. On-site evaluation tests (non- and less-destructive) as well as laboratory investigations on material samples are explained. Their main goals, preconditions, side-effects and tools are demonstrated and illustrated with results from selected case studies. The focus is on routine methods such as moisture and salt analysis, and determination of mechanical, structural and hydric properties (drilling resistance, ultrasonic wave measurements, Karsten tube measurements etc.). Additional methods are briefly discussed and linked with the recent literature. A separate part is dedicated to classical biological methods of investigation as well as modern molecular techniques.