CHAPTER 3 DAMAGE ANALYSIS AS A STEP TOWARDS COMPATIBLE REPAIR MORTARS Rob P.J. van Hees 1 , Luigia Binda 2 , Ioanna Papayianni 3 , Eleni Toumbakari 4 1 TNO Building and Construction Research, The Netherlands 2 Politecnico di Milano, Italy 3 Aristotle University of Thessaloniki, Greece 4 Katholieke Universiteit Leuven, Belgium 1. Introduction The aim of this chapter is to gain a better understanding of the factors (including environmental) that influence the way in which degradation of materials and especially mortars in monuments occurs. As part of the damage analysis the most common forms of degradation of mortar, as well as the type of investigation, required to diagnose the cause of the damage, are described. On the basis of the assessed decay form and decay process, the most adequate repair method and the most suitable repair mortar are also shown. The diagnosis of the cause of damage is often ignored in some repair methodologies, even though this is a fundamental step to guarantee a durable restoration. Such negligence can lead to major incompatibility problems when carrying out mortar repairs. The approach adopted in this document can lead to a better understanding of the causes of incompatibility and help in producing guidelines for compatible repair mortars, based on the specific conditions of the individual monument. 2. Factors affecting degradation processes The most important factors affecting degradation processes are related to: - environment - materials - design - workmanship and construction procedures - maintenance Principal factors related to the environment are: moisture supply: rainwater, moisture penetrating from the ground or surface water, snow melt, floods, … salt supply from the ground, ground or surface water or from the previous/ continuing use of the building (e.g. stables, salt storage) or via the air (aerosol), floods, de-icing salts air pollution variations and extremes in temperature exposure to fire dynamic load (earthquakes, wind, traffic, vibrations)
DAMAGE ANALYSIS AS A STEP TOWARDS COMPATIBLE REPAIR MORTARS
Apr 26, 2023
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Related Documents
