Performance Assessment of Precast RC Flooring Units Exposed 40 Years in Aggressive Industrial Environment

Abstract:

Performance of RC members is tightly closed to their environment. A long exposition time in aggressive environment corresponds frequently with the use of RC elements designed and produced in an epoch when technical norms, reflecting the knowledge level of the time, were insufficient to insure the durability of the elements.This paper presents the assessment of precast flooring units after 40 years of exposition in an aggressive industrial environment, specific to the steel industry. The assessment was performed using chemical and mechanical tests performed in situ and in the laboratory, using destructive as well as non-destructive techniques, applied at material and member level. Experimental methods were corroborated with calculation results.The paper presents also the steps which were taken in order to asses the performance of the concrete structural elements.The results of this study allow concluding about the causes which led to the observed damage and the identification of the remedial measures needed to restore the security of the investigated elements.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 737-744
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.737
• Online since: September 2016
• Authors: Radu Pascu*, Dan Paul Georgescu, Adelina Apostu
• Keywords: Carbonation, Corrosion, Durability, Punching

References

[1] R. Remus, M.A. Aguado Monsonet. S. Roudier, L. Delgado Sancho, Best Available Techniques (BAT) Reference Document for Iron and Steel Production, JRC Reference Report, Seville Spain, (2013).

[2] E. Erhan, The present stage of knowledge of air pollution in Moldavia and the requiring measures of prevention and control, Papers of Geographic Seminar Dimitrie Cantemir", University "A.I. Cuza, Iassy, Romania, No. 11-12, 1991-(1992).

[3] European Environment Agency, Revealing the costs of air pollution from industrial facilities in Europe, EEA Technical Report No. 15/2011, Luxembourg: Publications Office of the European Union, (2011).

[4] ASRO, SR EN 206: 2013, Concrete – Part 1: Specification, performance, production and conformity, Bucharest, (2014).

[5] American Concrete Institute, ACI 364. 1R-07 Guide for Evaluation of Concrete Structures before Rehabilitation, Farmington Hills, MI, (2007).

[6] MDRAP, C26-85, Norm for non destructive testing of concrete (in Romanian), Bucharest, (1985).

[7] ASRO, SR ISO 10523: 2012, Water quality - Determination of pH, Bucharest, (2012).

[8] ASRO, SR EN 196-2: 2013, Method of testing cement. Part 2: Chemical analysis of cement, Bucharest, (2014).

[6] ASRO, SR EN 1992-1-1: 2004, Eurocode 2; Design of concrete structures. Part 1-1: General rules and rules for buildings, Bucharest, (2006).