Abstract:
Salts are major decay agents of porous building materials and their action is particularly relevant in old buildings. This lecture has the following structure:
1 INTRODUCTION
2 SALT DECAY PATHOLOGY
2.1 - Anomalies
2.2 - Moisture
2.3 - Soluble salts
2.4 - Damage mechanisms
2.5 - Influencing factors
2.6 - Signs
3 CONTROL AND PREVENTION
3.1 - Working principles
3.2 - Methods of control and prevention Complementarity between methods Possible approaches
3.2.1 - Mechanical removal of efflorescence
3.2.2 - Removal of contaminating materials
3.2.2 - Poultices
3.2.2 - Electrochemical removal of salts
3.2.2 - Microorganisms
3.2.2 - Crystallization modifiers
3.2.2 - Plasters and renders
3.2.2 - Environmental control
3.2.2 - Rising damp control
3.2.2 - Barium hydroxide method
3.3 - Complementarity between methods
3.4 - Possible approaches
