MS 1-2: Performance Based Evaluation of Corrosion in Reinforced and Pre-Stressed Concrete Structures

Ulrich Schneck, CITec Concrete Improvement Technologies GmbH, Dresden, Germany

Ulrich Schneck    


The aim of the symposium shall be to present current methods, approaches and opportunities for a performance based assessment of corrosion processes in reinforced and pre-stressed concrete structures. The advantages of a performance based evaluation - compared to the most commonly used prescriptive rules - are for example:

- in case of regular monitoring: early information about developing corrosion issues, about local failures in concrete quality, about deviating environment exposure and/ or chloride ingress behaviour compared to the planned material specifications, and consequently a reduced repair effort
- in case of one-time monitoring prior to concrete repair and maintenance actions: the corrosion related surface parts can be identified safely and be separated from corrosion free areas (which is usually different from the visual appearance) – this results in enhanced repair options, precise information for required quantities in tenders, and higher durability of the repair
- in case of early detected problem areas without immediate need of repair: monitoring sensors can be placed appropriately for long-term surveillance

Generally, with a deeper understanding of the corrosion processes in an individual structure, the maintenance and repair effort can be reduced and focussed on areas in need. The lifetime can be expanded, and responsible advice can be given about when, how and where to act or even to do nothing and tolerate an overall increased chloride content, because no typical macro elements and pitting corrosion can result from this situation.


Corrosion-induced cracking evolution and reliability prediction of aging RC structures
H. Chen, N. Xiao

Durability of cooling tower constructions and methods of their repair and reinforcement
M. Kaminski, M. Maszczak

Probabilistic assessment for structural performance of port RC structure
E. Kato, Y. Kawabata, M. Iwanami, H. Yokota

The impact of resistivity on potential mapping
S. Keßler, C. Gehlen

Non-destructive corrosion surveys: Methods and opportunities
U. Schneck

Approaches for non-destructive corrosion surveys of bridge decks from the soffit and under traffic: A case study
U. Schneck

Life-cycle design of concrete structures under consideration of advancing reinforcement corrosion
C. Siegert, M. Empelmann

Prediction of remaining service life of cracking concrete box girder bridges
Y. Xiang, J. Xu, L. Liu, X. Li