- Title
- Corrosion behaviour of mortar embedded wall-ties in natural and artificial environments
- Creator
- Jardim do Nascimento, B.; Chaves, I. A.; Masia, M. J.; Melchers, R. E.
- Relation
- Corrosion and Prevention 2019. Corrosion and Prevention 2019 (Melbourne 24-27 November, 2019)
- Publisher
- Australasian Corrosion Association
- Resource Type
- conference paper
- Date
- 2019
- Description
- At present metallic wall-ties for use in masonry veneer and cavity wall construction are classified according to their level of corrosion resistance. This durability classification is based on short-term artificial salt spray testing according to Australian Standard AS 2699.1:2000. Previous studies have shown that the corrosion process changes with time. As a result, long-term durability predictions based on short-term results present a challenge for extrapolation. Moreover, the relevance of artificial environment simulations used for extrapolating equivalent long-term field exposure loss predictions also has been questioned. This study reports one-year test results from an empirical testing program currently in progress, and which tracks corrosion damage for several permutations of wall-tie durability class materials and mortar mixes exposed to both natural and artificial salt spray environments. The preliminary results indicate differences in corrosion behaviour of galvanized and stainless-steel ties. They also indicate differences between exposure conditions, with causality attributed to potential mortar atmosphere-interface conditions. The likely reasons for these observations and the potential practical implications are explored and discussed.
- Subject
- masonry; tie corrosion; field exposure; corrosion protection; durability classification
- Identifier
- http://hdl.handle.net/1959.13/1417153
- Identifier
- uon:37170
- Language
- eng
- Full Text
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