- Title
- Long-term atmospheric corrosion of mortar embedded wall-ties
- Creator
- Jardim do Nascimento, B.; Chaves, I. A.; Masia, M. J.; Melchers, R. E.
- Relation
- Corrosion and Prevention 2018. Annual Conference. Annual Conference of the Australasian Corrosion Association: Corrosion & Prevention 2018 Proceedings (Adelaide, SA 11-14 November, 2018)
- Publisher
- Australasian Corrosion Association
- Resource Type
- conference paper
- Date
- 2018
- Description
- Metal ties provide structural capacity to masonry cavity or veneer wall construction. Corrosion of wall-ties when embedded in the mortar can be severe and lead to premature structural failure of walls. The present project investigates whether available atmospheric corrosion models can be used to predict loss of structural capacity since these are based on short term data and only consider deterioration for the part of the ties exposed within the wall cavity. Yet, it is known from field observations that the corrosion within the mortar can be more severe than that in the cavity and therefore rapidly jeopardise the tie’s longevity. Moreover, the existing atmospheric models are sensitive to parameter changes and bound by theoretical assumptions which in turn can result in an unacceptable level of uncertainty of the predictions. This paper describes an empirical long-term framework to investigate the corrosion of mortar embedded galvanised (40g/m² and 470g/m²) and 316L stainless steel wall-ties. Three different types of ties, each embedded in three different classes of mortar with increased cement content, are being exposed to naturally aggressive as well as artificial salt spray environments. Observed differences in deterioration mechanisms as well as capacity loss are discussed within.
- Subject
- masonry wall-ties; mortar; atmospheric corrosion; structural reliability
- Identifier
- http://hdl.handle.net/1959.13/1405995
- Identifier
- uon:35574
- Identifier
- ISBN:9781510881372
- Language
- eng
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