Effect of concreting defects on the uptime of reinforced concrete during the construction of new Arctic settlements by the criterion of exposure to air carbon dioxide

Abstract

The development of Arctic territories and waters requires the construction of new settlements with industrial infrastructure. Modified concrete is used for the construction of these facilities. However, during erection of monolithic reinforced concrete structures defects and damages are formed, which affect their durability and reliability. The results of probabilistic simulation of failure-free operation of reinforced concrete according to the criterion of carbon dioxide gas effect on concrete for conditions of Sabetta settlement are given in the work. Concretes with a water-cement ratio of 0.35 and 0.50 per CEM III/A 42.5N were taken as design values. Design thickness of the protective layer is 45 mm, depth of defects and damages is 5, 10, 15, 25 mm. Probability modeling was performed using the Duracret model using Excel and PTC Mathcad. The results showed that without defects and damages the period of normal operation as a whole corresponds to the design value of 50 and 100 years. In case of defects, the first local areas may appear in 15-40 years.