Quantification of exposure classes in the European Standard EN 206-1
2005 (English)In: Conference on Durability of Building Materials and Components, CSTB, Lyon, 17–20 April 2005, 2005Conference paper (Refereed)
The recently completed EU-project Life Cycle Management of Concrete Infrastructure for ImprovedSustainability (Lifecon) has developed a generic and predictive Life Cycle Management System(LMS) for maintenance optimisation and planning of buildings. The system facilitates the change oftoday’s reactive practice of maintenance management into a predictive life cycle based maintenancemanagement system. To enable simplified prediction of service life and maintenance interval in such apredictive life cycle management system, a quantitative classification system for environmentalloading is needed. At present there are a number of standards containing quantitative classification ofenvironmental loading onto structures and building materials, e.g. ISO 15686-4, EOTA and ISO 9223.The governing standard for concrete structures such as bridges and tunnels is the European StandardEN 206-1 Concrete – part 1: Specification, performance, production and conformity. This standarddivides the environmental loading into 18 exposure classes, which cover environmental loads fromatmosphere, seawater, fresh water, groundwater and soil, but also the decisive parameters for moistureand chlorides. Almost all exposure classes within the standard include only qualitative descriptions.To make the standard EN 206-1 valid for LMS the standard has to be further developed into aquantitative classification system for environmental loading. A proposal of a quantitative classificationof the exposure classes within the standard EN 206-1 regarding corrosion induced by carbonation ispresented in this paper. The proposed classification is partly based on the extensive work performed inthe Lifecon project, partly based on literature studies. The proposed classification is validated throughcomparison of real measurements made on a bridge located in Sweden and calculations using a fullprobabilistic degradation model. It is believed that such exposure classification is possible to use in aLMS to provide simplified service life analysis and possibilities to map the risk of degradation.
Place, publisher, year, edition, pages
Quantitative classification, exposure classes, carbonation, EN 206-1
IdentifiersURN: urn:nbn:se:kth:diva-8825OAI: oai:DiVA.org:kth-8825DiVA: diva2:14281
QC 201007162005-11-292005-11-292010-11-30Bibliographically approved