Test methods to determine durability of concrete under combined environmental actions and mechanical load
final report of RILEM TC 246-TDC
Yan Yao (China Building Materials Academy)
Ling Wang (China Building Materials Academy)
Folker H. Wittmann (Aedificat Institute Freiburg)
Nele De Belie (Universiteit Gent)
Erik Schlangen (TU Delft - Civil Engineering & Geosciences)
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 (TU Delft - Civil Engineering & Geosciences)
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)
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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.