Zementgebundene Beschichtungen zum Schutz und zur Instandsetzung von Stahlbetonbauwerken / Protective and repair layers for concrete structures
-
G. Martinola
Abstract
Cement based layers are frequently used during the repair of reinforced concrete structures nowadays. They restore the protection of the reinforcement against the penetration of aggressive substances. Protective coatings can also be applied to new structures in order to improve their durability. This paper discusses a concept for the improvement of durability of existing and new reinforced concrete structures using protective layers. To offer protection and to prevent the transport of harmful substances inside the reinforced concrete structure these layers have to be free from cracks during the planned service life. Under usual conditions such layers are submitted to different phenomena like thermal, hygral and autogenous shrinkage and swelling. These processes create a complex state of eigenstresses inside the system layer-subbase. The tensile stresses can lead to the formation of cracks and delamination of the protective layer after a few years. This paper suggests an approach for correct design of systems of protective as repair layers. For this purpose a numerical model is used in order to determine the time dependent stress distribution and the crack formation due to different loads and boundary conditions. On this basis the requirements for a layer can be formulated ad hoc as a function of the probabilistic properties of each damaged building and the risk of failure can be minimized.
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Artikel in diesem Heft
- Inhalt / Contents
- Impressum
- Editorial
- Giovanni Martinola, \NTA-Preisträger 2000, Eine kleine Laudatio
- Zementgebundene Beschichtungen zum Schutz und zur Instandsetzung von Stahlbetonbauwerken / Protective and repair layers for concrete structures
- Korrosion rostfreier Stähle in chloridhaltigem und karbonatisiertem Beton / Corrosion Behaviour of Stainless Steels in Chloride Contaminated and Carbonated Concrete
- Simulieren der kapillaren Wasseraufnahme von porösen Werkstoffen des Bauwesens / Modelling of the Capillary Water Absorption of Porous Building Materials
- Validieren eines Modells zur Beschreibung des Bohrvorganges in Naturstein mit Hilfe von Daten, die mit dem Bohrwiderstandmess- System (DFMS) erhalten / werden Validation of a Model of Rotary Drilling of Rocks with the Drilling Force Measurement System
- Aus der Praxis / Applications
- Wichtige Voraussetzungen für die Funktion von Sanierputzsystemen
- Mitteilungen und Hinweise / Short Notes
- Firmenmitteilungen / Companies inform
- Buchbesprechungen / Book Reviews
- Neuerscheinungen / New Books
- WTA - News
- Veranstaltungskalender / Calendar of Events
- Stichwörter und Bezugsquellen
Artikel in diesem Heft
- Inhalt / Contents
- Impressum
- Editorial
- Giovanni Martinola, \NTA-Preisträger 2000, Eine kleine Laudatio
- Zementgebundene Beschichtungen zum Schutz und zur Instandsetzung von Stahlbetonbauwerken / Protective and repair layers for concrete structures
- Korrosion rostfreier Stähle in chloridhaltigem und karbonatisiertem Beton / Corrosion Behaviour of Stainless Steels in Chloride Contaminated and Carbonated Concrete
- Simulieren der kapillaren Wasseraufnahme von porösen Werkstoffen des Bauwesens / Modelling of the Capillary Water Absorption of Porous Building Materials
- Validieren eines Modells zur Beschreibung des Bohrvorganges in Naturstein mit Hilfe von Daten, die mit dem Bohrwiderstandmess- System (DFMS) erhalten / werden Validation of a Model of Rotary Drilling of Rocks with the Drilling Force Measurement System
- Aus der Praxis / Applications
- Wichtige Voraussetzungen für die Funktion von Sanierputzsystemen
- Mitteilungen und Hinweise / Short Notes
- Firmenmitteilungen / Companies inform
- Buchbesprechungen / Book Reviews
- Neuerscheinungen / New Books
- WTA - News
- Veranstaltungskalender / Calendar of Events
- Stichwörter und Bezugsquellen
