The influence of microstructure on the maximum load and fracture energy of refractory castables

Autor(es)

Ribeiro, S. ^[1] ; Rodrigues, J. A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Engn Lorena, Dept Mat Engn, BR-12600970 Lorena, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 36, n. 1, p. 263-274, JAN 2010.
• Citações Web of Science: 44

Resumo

Refractory castables are composed of fractions of fine to fairly coarse particles. The fine fraction is constituted primarily of raw materials and calcium aluminate cement, which becomes hydrated, forming chemical bonds that stiffen the concrete during the curing process. The present study focused on an evaluation of several characteristics of two refractory castables with similar chemical compositions but containing aggregates of different sizes. The features evaluated were the maximum load, the fracture energy, and the ``relative crack-propagation work{''} of the two castables heat-treated at 110, 650, 1100 and 1550 degrees C. The results enabled us to draw the following conclusions: the heat treatment temperature exerts a significant influence on the matrix/aggregate interaction, different microstructures form in the castables with temperature, and a relationship was noted between the maximum load and the fracture energy. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• Processo FAPESP: 01/04324-8 - Estudo sistêmico para o desenvolvimento de concretos refratários avançados II
• Beneficiário: Victor Carlos Pandolfelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático