Materials and Structures

, Volume 39, Issue 1, pp 105–113 | Cite as

Influence of Microstructure on The Resistance to Salt Crystallisation Damage in Brick

  • D. Benavente
  • L. Linares-Fernández
  • G. Cultrone
  • E. Sebastián
Article

Abstract

In the article we study the variation of brick durability and, more specifically, its resistance to salt crystallisation produced by changes in its microstructure during firing. For this purpose, the evolution of both mechanical and pore structure properties are studied within a wide range of temperatures (700–1100C). An increase in the firing temperature produces a more homogeneous and resistant brick, measured using ultrasound velocity and uniaxial compressive strength. This result is obtained thanks to the vitrification process and changes in the brick's pore structure: larger, rounder pores, which are quantified by their roundness and fractal dimension. As a result of these changes, an excellent durability is achieved in the bricks studied when fired at temperatures above 1000C. Considering that few differences are noted in pore structure and brick strength between 1000 and 1100C, the recommended firing temperature is, for raw materials with a similar composition and production process, 1000C, as this involves a lower production cost than firing at 1100C.

Keywords

Fractal Dimension Pore Shape Ultrasound Velocity Pore Structure Parameter Capillary Imbibition 

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Copyright information

© RILEM 2006

Authors and Affiliations

  • D. Benavente
    • 1
  • L. Linares-Fernández
    • 2
  • G. Cultrone
    • 3
  • E. Sebastián
    • 3
  1. 1.Laboratorio de Petrología Aplicada. Unidad Asociada CSIC-UA. Dpto. Ciencias de la Tierra y del Medio AmbienteUniversidad de AlicanteAlicanteSpain
  2. 2.Dpto. de Construcciones ArquitectónicasUniversidad de AlicanteAlicanteSpain
  3. 3.Dpto. de Mineralogía y Petrología, F. de CienciasUniversidad de GranadaGranadaSpain

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