Carbonation-related microstructural changes in long-term durability concrete

Authors

  • Cláudio A. Rigo da Silva Universidad of Minas Gerais Rua Belo Horizonte (Brasil)
  • Rubens J. Pedrosa Reis Universidad FUMEC Belo Horizonte (Brasil)
  • Fernando Soares Lameiras Centro de Desarrollo de Tecnología Nuclear CNET/CDTN (Brasil)
  • Wander Luiz Vasconcelos Federal University of Minas Minas Gerais (Brasil)

Keywords:

concrete, carbonation, microstructure, long-term durability

Abstract

This paper discusses the effects of carbonation on the microstructure of portland cement concrete for longterm durability applications. A class C40 concrete (characteristic compression strength between 40 MPa and 44 MPa on the 28th day, according to Brazilian standard NBR 8953) was chosen for the experimental study of the carbonation effects, from which test samples were molded for accelerated test under a 100%-CO2 atmosphere after physical and mechanical characterization. It was observed that carbonation provoked a reduction of 5% to 12% of the concrete open porosity accessible to water. Flexural strength values obtained after the carbonation tests revealed a decrease of 12% and 25% in relation to the values obtained before tests on the 28th and 91st days, respectively.

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Author Biographies

Cláudio A. Rigo da Silva, Universidad of Minas Gerais Rua Belo Horizonte (Brasil)

Departamento de Ingeniería de .Materiales y Construcción Civil Federal Universirv of Minas Gerais Rua Belo Horizonte, MG, Brasil

Department of Materials Engineering and Civil Construction Federal University of Minas Gerais Rua Belo Horizonte, MG. Brazil 

Rubens J. Pedrosa Reis, Universidad FUMEC Belo Horizonte (Brasil)

Departamento de Ingeniería Civil, FUMEC Belo Horizonte, MG, Brasil

Department of Civil Engineering, FUMEC Belo Horizonte. MG, Brazil

Fernando Soares Lameiras, Centro de Desarrollo de Tecnología Nuclear CNET/CDTN (Brasil)

Centro de Desarrollo de Tecnología Nuclear (CNET/CDTN) Brasil

Nuclear Technology Development Center (CNET/CDTN) Brazil

Wander Luiz Vasconcelos, Federal University of Minas Minas Gerais (Brasil)

Departamento de Ingeniería Metalúrgica y de Materiales Federal University of Minas Gerais Belo Horizonte, MG, Brasil

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Published

2002-12-31

How to Cite

Rigo da Silva, C. A., Pedrosa Reis, R. J., Soares Lameiras, F., & Vasconcelos, W. L. (2002). Carbonation-related microstructural changes in long-term durability concrete. Revista Ingeniería De Construcción, 17(3), 144–150. Retrieved from https://revistaingenieriaconstruccion.uc.cl/index.php/ric/article/view/17153

Issue

Vol. 17 No. 3 (2002)

Section

Original Research

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.