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Revista IBRACON de Estruturas e Materiais

On-line version ISSN 1983-4195

Rev. IBRACON Estrut. Mater. vol.4 no.5 São Paulo Dec. 2011

https://doi.org/10.1590/S1983-41952011000500009 

Contribution to the obtainment of concrete elastic modulus using micromechanics modeling

 

 

A. H. BarbosaI; P. A. Lopez-YanezII; A. M. P. CarneiroIII

IColegiado de Engenharia Civil, Universidade Federal do Vale do São Francisco, e-mail: anderhb@yahoo.com.br, Av. Antônio Carlos Magalhães, 510, Country Club, Juazeiro-BA, Brasil, CEP 48902-300
IIDepartamento de Engenharia Civil, Universidade Federal de Pernambuco, e-mail: pablo@ufpe.br, Av. Acad. Hélio Ramos, s/n - CTG/DECIV, Várzea, Recife-PE, Brasil, CEP 50740-530
IIIDepartamento de Engenharia Civil, Universidade Federal de Pernambuco, e-mail: ampc@ufpe.br, Av. Acad. Hélio Ramos, s/n - CTG/DECIV, Várzea, Recife-PE, Brasil, CEP 50740-530

 

 


ABSTRACT

Mathematical expressions from national codes show that concrete elastic modulus is a function of concrete compressive strength. But concrete, regarded as a three-phase composite material, has elastic properties directly affected by the interfacial transition zone (ITZ), which is characterized by its higher porosity in comparison to the cement paste. Micromechanical models such as the Mori-Tanaka and three-phase sphere may be applied with good results when used to analyze the concrete. This paper presents a study on the evolution of the concrete elastic modulus, this study is carried out by the application of normative expressions and micromechanics models. Compared to the experimental results, a good fitting of micromechanical modeling with ITZ included is observed. Additionally, the quality of the NBR 6118:2003 and CEB-90 expressions is confirmed.

Keywords: concrete, elastic modulus, normative expressions, micromechanic, interfacial transition zone.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

9. Acknowledgments

The authors thank CNPq for the financial support.

 

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Received: 27 Oct 2010
Accepted: 03 Sep 2011
Available Online: 28 Nov 2011

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