Chloride ingress in concrete exposed to a Swedish road environment for over 20 years

Author(s): Luping Tang, Dimitrios Boubitsas, Peter Utgenannt
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 278-285
Total Pages: 813
Language: English

Abstract: In the middle of 1990’s many reinforced concrete specimens with various qualities were exposed at the field site by a Swedish highway. The main variations include water-binder ratio (0.3, 0.35, 0.4 and 0.5), binder type (eight types of binder including five types of commercial cement and three types of blended cement with different additions of limestone, silica fume and ground granulated blast-furnace slag), and air content (5% entrained air and non-entraining). Measurements of chloride ingress profiles have been made after exposure for 1, 5, 10 and 20 years. The results show that, under Swedish de-icing salt environment chloride
ingress in concrete with w/b 0.5 can reach the threshold level 0.4% by mass of binder (as the maximum allowed in EN 206-1) at the depth of 30-40 mm after exposure for 20 years, whilst in concrete with w/b ≤ 0.4 the ingress depth at which the threshold level is reached will be less than 30 mm after the same exposure duration. Concerning chloride ingress in concrete, Swedish de-icing salt road environment is not as severe as Swedish marine splash environment.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00