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Revista IBRACON de Estruturas e Materiais

On-line version ISSN 1983-4195

Rev. IBRACON Estrut. Mater. vol.3 no.2 São Paulo June 2010

http://dx.doi.org/10.1590/S1983-41952010000200007 

An attempt to classify environmental aggressiveness in the city of Salvador - BA

 

 

J. M. L. VilasboasI; S. L. MachadoII

IEngenheiro Civil, Mestre em Gerenciamento Ambiental, Professor Titular, UCSAL/PETROBRAS, josemarcilio@petrobras.com.br
IIEngenheiro Civil, Doutor em Geotecnia, Professor Associado II, UFBA, smachado@ufba.br

 

 


ABSTRACT

This paper presents a proposal for a classification of environmental aggressiveness in different areas of the city of Salvador, Bahia, Brazil. The work is based on the analysis of field data acquired in different areas of the city over the period of 2003 to 2007 and on the information obtained from designers and companies that perform mitigation actions in reinforced concrete structures. The occurrences of pathologies in reinforced concrete constructions which have suffered intervention in the city were used to identify the areas of the city with different degrees of environmental aggressiveness. Statistical analysis was carried out to identify the variables that most influence the intensity of the attack of the environmental agents on the reinforced concrete structures. Empirical equations are proposed and fitted to experimen- tal results. Finally a map is drawn up considering the urban zone of the city of Salvador, classifying it into zones of different degrees of environmental aggressiveness. Despite being completely empirical work, whose derived equations are valid only to the specific case of Salvador-BA, the authors believe that this methodology could be used in other cities in Brazil with different characteristics, since it takes into account the particularities of each place.

Keywords: environmental aggressiveness, classification, reinforced concrete, pathologies.


 

 

Texto completo disponível apenas em PDF.

Full text avaliable only in PDF.

 

 

5.   References

[01]   AMERICAN SOCIETY FOR TESTING AND MATERIALS. ASTM G-140. Standard test method for determing atmospheric chloride deposition rate by wet candle method. Anual Book of ASTM Standards. Philadelphia. 1996.         [ Links ]

[02]   ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. NBR 6118. Projeto de estruturas de concreto. Rio de Janeiro, 2003. 221 p.         [ Links ]

[03]   COSTA, Eduardo Antonio Lima. Determinação do potencial de agressão dos sais marinhos sobre as argamassas de revestimento na região metropolitana de Salvador. Dissertação (Mestrado em Engenharia Civil) - Escola de Engenharia, Universidade Federal do Rio Grande do Sul, Porto Alegre, 2001.         [ Links ]

[04]   FELIÚ, S.; MORCILLO, M.; CHICO, B. Effect of distance from sea on atmospheric corrosion rate. Corrosion, Marid, v. 55, n.9, 1999, p.883-891.         [ Links ]

[05]   MEIRA, Gibson Rocha; PADARATZ, I.J. Efeito do distanciamento em relação ao mar na agressividade por cloretos. In: REUNIÃO ANUAL DO INSTITUTO BRASILEIRO DO CONCRETO, 44, 2002, Foz do Iguaçu. Trabalho apresentado.         [ Links ] [06]   METHA, P.K.; MONTEIRO, P.J.M. Concreto, estrutura, propriedades e materiais. São Paulo: Pini, 1994. 572 p.         [ Links ]

[07]   MORCILLO, M. Corrosión y proteccción de metales em lãs atmosferas de iberoamerica. Madrid: Cyted, 1998. 52 p.         [ Links ]

[08]   NUNES, L.P, DUTRA, A.C. Proteção catódica: técnica de combate à corrosão. Rio de Janeiro: Interciência, 2006. 262 p.         [ Links ]

[09]   SILVA, Paulo Fernando A. Durabilidade das estruturas de concreto aparente em atmosfera urbana. São Paulo: Pini, 1995. 152 p.         [ Links ]

[10]   VILASBOAS, J. M. Durabilidade das edificações de concreto armado em Salvador: uma contribuição para implantação da NBR 6118:2003. Dissertação (Mestrado em Gerenciamento e Tecnologias Ambientais no Processo Produtivo) – Departamento de Engenharia Ambiental, Universidade Federal da Bahia, Salvador, 2004.         [ Links ]

 

 

Received: 07 May 2009
Accepted: 20 Jan 2010
Available Online: 30 Jun 2010

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