A holistic conceptual approach to concrete service life: a split into different time-stages
Abstract
The goal of this paper is to analyze and discuss a conceptual approach that considers the holistic character of concrete service life but splits it into seven time-stages that can be compared, for understanding purposes, with those of a human being. The existing concepts about service life may be incomplete regarding those that must consider the whole life of a concrete structure. One of the reasons for this is the lack of certainty of the service life predictions which are based on models that consider a series of non-clearly defined time-stages. The life of a structure has many similarities with that of a human being. In fact, it is no coincidence that engineering has adopted some terms from the medical sciences like “pathology†to refer to structures with problems of “healthâ€. The paper discusses the overlapping of the different time-stages as well as the reasons why the prediction models can fail.
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References
American Concrete Institute (2000), “ACI-365: Service-Life Prediction- State-of-the-Art Reportâ€.
Andrade, C. (1994), Quantification of durability of reinforcing steel, methods and calculation procedures of Concrete technology: New Trends, Industrial Applications, A. Aguado, R. Gettu and S.P. Shah, Editors. RILEM. Published by E&FN Spon, 2-6 Boundary Row, London SE1 8HN, UK ISBN 0 419 20150 5. pp: 158-175.
APROY-NMX-C-530-ONNCCE (2017), “Industria de la construcción – Durabilidad – Norma general de durabilidad de estructuras de concreto reforzado – Criterios y Especificacionesâ€.
Basheer, P. A. M. (1993), A brief review of methods for measuring the permeation properties of concrete in-situ, Structures and Buildings, Proceedings of the ICE, vol 99, 74-83. https://doi.org/10.1680/istbu.1993.22515
European Community (1989), “COUNCIL DIRECTIVE of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States relating to construction products.â€, Off. J. Eur. Communities, vol. 40, no. L, pp. 12–26.
Helene, P. (2003), A nova NB 1/2003 (NBR 6118) e a vida útil das estruturas de concreto, University of Sao Paulo PCC USP.
Sarja, A., Vesikaeri, E. (1996), Chapter 7 Durability models, In Durability Design of Concrete Structures. Manuscript of RILEM Report of TC 130-CSL, RILEM Report Series 14. pp: 97-111, E & FN Spon, Chapman and Hall, 165 p.
Somerville, G. (1997), “Engineering design and service life: a framework for the futureâ€, In Prediction of concrete durability: Proceedings of the STATS 21st anniversary conference /1997, J. Glanville and A. M. Neville, Editors, pp. 58-76, E & FN Spon, UK.
Troconis, O., Romero, A., Andrade, C., Helene, P., DÃaz, I. (1998), Manual de inspección, evaluación y diagnóstico de corrosión en estructuras de hormigón armado, 2nd ed. Red Durar.
Tuutti, K. (1982), “Corrosion of steel in concreteâ€, Swedish Cement and Concrete Research Institute, Stockholm.
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