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Vol. 29. Issue 1.
Materiais 2015
Pages e172-e176 (January - April 2017)
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Vol. 29. Issue 1.
Materiais 2015
Pages e172-e176 (January - April 2017)
DOI: 10.1016/j.ctmat.2016.07.006
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Mechanical characterization of mortar beams
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F.A.C. Oliveiraa,
Corresponding author
fernando.oliveira@lneg.pt

Corresponding author.
, S.V.B. Lopesb, J.C. Fernandesb
a LNEG - Laboratório Nacional de Energia e Geologia I.P., Laboratório de Energia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal
b IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Article information
Abstract

The mechanical characterization of mortars is problematic due to their sensitivity to stress concentration defects, namely pores and flaws. In this paper, data on three-point bending, Young's modulus and fracture toughness of mortar beams are presented and discussed. Here, Weibull statistics is applied to analyse flexural strength of the developed mortar. Based on data obtained according to the EN196-1 standard and corrected values taking into account the actual position where failure origin took place, Weibull modulus was found to decrease from 28 to 22, respectively. In addition, fracture toughness was determined using Griffith approach based on critical crack sizes measured by fractography in fracture surfaces. A value of 0.37±0.04MPa m½ was obtained, which is typical of very fragile brittle materials.

Keywords:
Mortar
fracture toughness
Young's modulus
flexural strength
Weibull modulus
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Copyright © 2017. Portuguese Society of Materials (SPM)
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