Interaction of deteriorating processes in cement-based materials

Title: Interaction of deteriorating processes in cement-based materials
Author(s): F.H. Wittmann, P. Zhang, T. Zhao
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 299 - 311
Total Pages: 13
Nb references: 12
Language: English

Abstract: If service life of reinforced concrete structures is to be predicted, usually one dominant deteriorating mechanism is taken into consideration. In reality, however, concrete structures are exposed to a number of simultaneously or consecutively acting deteriorating processes. In practice a multitude of environmental loads will superimpose mechanical loads in most cases.
In this contribution the influence of frost damage on rate of carbonation and on chloride penetration will be outlined. This is meant to be an example for the influence of damage induced to the microstructure of concrete on rate of carbonation and on chloride penetration.
It will be demonstrated by appropriate experimental results that both the rate of carbonation and the penetration depth of chlorides increase considerably after modest frost damage. Characteristic damage of the micro-structure is caused by frost damage. These results indicate clearly that it is mandatory to take synergetic damage of the microstructure into consideration for a realistic service life prediction.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00