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Site air-permeability test: credentials as "durability meter"

Author(s): R. J. Torrent, L. Ebensperger
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjřrv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 430-445
Total Pages: 16
Language : English

Abstract: The authors have been involved in the creation, development and preliminary applications of the “Torrent Method” to test, non-destructively, the air-permeability of concrete. The method is suitable for the laboratory but, more important, for site investigation of finished structures. It has been about 20 years since such foundational research and this paper presents an updated review of the evolution and current situation of the method, included in the Swiss Standards in 2003. Application examples conducted in laboratory and civil works (bridges, tunnels and buildings) are presented, including data from different countries worldwide. Correlations between the air permeability coefficient kT and other durability indicators, such as Chloride migration (ASTM C1202), Penetration of water under pressure (EN 12390-8), Capillary suction and Frost-Thaw-Salts resistance are presented. Recent recommendations of the Swiss Federal Highway Administration on the application of the method on site are summarized. Finally, the future prospective uses are discussed, both as quality control tool for new structures and for the condition assessment of existing structures.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00

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