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Pro109-1

SERVICE LIFE PREDICTION OF A CEMENTITIOUS COATING SYSTEM BASED ON CHLORIDE-INDUCED CORROSION



Author(s): Hua Dong, Guang Ye
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 372-381
Total Pages: 10
Language : English


Abstract: Cementitious materials are usually applied as an overlay to enhance the durability of concrete
structures. This study takes into account the time dependent chloride binding isotherms of
materials in the overlay system, and predicts the service life of reinforced concrete structures
based on the chloride-induced corrosion. In order to realize a more realistic simulation, an
interval of 25 years is specified to replace the overlay material on the concrete substrate. For
comparison, simulation of chloride ingress into a single reinforced concrete substrate is
conducted, on which the concrete cover is also renewed in the same time interval. The results
show that a thin layer of cementitious overlay material with the thickness of no more than 10
mm can significantly improve the resistivity of concrete structures to chloride ingress. A
cementitious overlay system with replacement of a thin overlay material in every 25 years has
only a slight influence on the evolution of chloride profiles in concrete substrate, compared to
an overlay system without replacement of overlay material. Furthermore, the efficiency of a
thin overlay material on extending the service life of reinforced concrete structures is found to
be comparable to the case that concrete cover is renewed periodically.


Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00


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