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Pro109-2

A RISK-BASED MODEL FOR DETERMINING ALLOWABLE ADMIXED CHLORIDE LIMITS IN CONCRETE



Author(s): Mahmoud Shakouri, David Trejo, Paolo Gardoni
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:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 631-640
Total Pages: 10
Language : English


Abstract: Chlorides can be detrimental to the corrosion of steel in concrete. As a result, many
organizations limit the amount of admixed chlorides that can be included in new concrete for
reinforced concrete structures. However, because chlorides are ubiquitous in most constituent
materials used to make concrete, eliminating all chlorides from the constituent materials
would make most concrete systems uneconomical. In addition, there is little consensus within
the concrete community on how much chloride can be allowed in new concrete - a wide
variety of limits are currently specified. This paper identifies variables that influence the
service life of conventionally reinforced concrete systems exposed to chloride environments.
It also proposes a general outline for a risk-based framework that can be used to specify
allowable chloride limits in concrete. The allowable admixed chloride limit in the proposed
framework is based on structure type and importance, constituent materials, exposure
conditions, and risk level desired by the owner.


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


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