Paper Title:
Study of Aggregate Size Effect on Fracture Toughness of Petreous Macrocomposites (Concrete)
  Abstract

The present study investigates the effect of rock aggregate size on the fracture toughness of a petreous macrocomposite material (concrete). The effect of aggregate size on the fracture properties of concrete was studied by analysing the fracture toughness KIC results obtained using single edge notched beam (SENB) specimens submitted to 4-point bending test. The results were obtained according to the methodology proposed by Srawley and Gross for monolithic ceramic materials. Additionally, the effect of aggregate size has been analysed by performing fractographic examination of unnotched beam specimens also submitted to 4-point bending test. KIc values obtained via linear elastic fracture mechanics (LEFM) theory applied to the fractographic data were comparable to those obtained by SENB method. The obtained results show that the fracture toughness of concrete depends on the aggregate particle size, although KIC is not linearly related with the particle size. Fracture behaviour depends on the interaction between the used mortar (a mixture of portland cement with sand and water) and the different rock (aggregate) particle sizes. This kind of studies allows further extending the knowledge on the failure mechanisms of concrete, which permits to improve the characteristics of these macrocomposite materials by understanding the effects related to the modification of their structure.

  Info
Periodical
Materials Science Forum (Volumes 636-637)
Edited by
Luís Guerra ROSA and Fernanda MARGARIDO
Pages
1342-1348
DOI
10.4028/www.scientific.net/MSF.636-637.1342
Citation
A. S. Marques, P. M. Amaral, L. G. Rosa, J. C. Fernandes, "Study of Aggregate Size Effect on Fracture Toughness of Petreous Macrocomposites (Concrete) ", Materials Science Forum, Vols. 636-637, pp. 1342-1348, 2010
Online since
January 2010
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Andrea Kubošová, Miroslav Karlík, Petr Haušild, J. Prahl
Abstract:Fracture behaviour of two intermetallic alloys based on FeAl and Fe3Al was studied. On the alloys Fe-40Al-1C (at%) and...
349
Authors: Maria Berkes Maros, Nikoletta Kaulics Helmeczi, Ján Dusza
Abstract:Si3N4 is widely used as a structural ceramic, therefore mechanical characterization, especially in dynamic loading conditions is important...
73
Authors: Harald Harmuth, Christian Manhart
Abstract:A fractographic procedure was developed and applied for ordinary ceramic refractory materials with a rather large size of heterogeneities and...
209
Authors: Maria Berkes Maros, Nikoletta Kaulics Helmeczi, Péter Arató, Csaba Balázsi
Abstract:A comprehensive experimental and theoretical work aiming at studying the dynamic failure process of silicon nitride ceramics has been...
338