Test methods to determine durability of concrete under combined environmental actions and mechanical load

final report of RILEM TC 246-TDC

Journal article (2017)

Authors

Yan Yao China Building Materials Academy
Ling Wang China Building Materials Academy
Juan Li China Building Materials Academy
Weihong Li Dalian University
Max J. Setzer WISSBAU® Consultant Engineering Corporation
Feng Xing Shenzhen University
Yin Cao China Building Materials Academy
Folker H. Wittmann Aedificat Institute Freiburg
Nele De Belie Universiteit Gent
E. Schlangen Materials and Environment - CEG
Hugo Eguez Alava Universiteit Gent
Zhendi Wang China Building Materials Academy
Sylvia Kessler Technische Universität München
Christoph Gehlen Technische Universität München
B. Binti Md Yunus Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Concrete durability Service life prediction Compressive stress Tensile stress Chloride ion diffusion Combined actions
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Published Date

01-04-2017

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

At present several methods are available to predict the durability of reinforced concrete structures. In most cases, one dominant deterioration process such as carbonation or chloride penetration is taken into consideration. Experimental results as well as observations in practice show that this is not a realistic and certainly not a conservative approach. In order to test more realistically, RILEM TC 246-TDC, founded in 2011, has developed a method to determine the durability of concrete exposed to the combined action of chloride penetration and mechanical load. In this report, a test method is presented which allows determination of realistic diffusion coefficients for chloride ions in concrete under compressive or tensile stress. Comparative test results from five different laboratories showed that the combination of mechanical and environmental loads may be much more severe than a single environmental load without mechanical loading. Modelling and probabilistic analysis also showed that the obvious synergetic effects cannot be neglected in realistic service life prediction.