Effect of temperature on the mechanical properties of self-flowing low cement refractory concrete

Altun I.

CEMENT AND CONCRETE RESEARCH, vol.31, no.8, pp.1233-1237, 2001 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 8
  • Publication Date: 2001
  • Doi Number: 10.1016/s0008-8846(01)00533-6
  • Journal Name: CEMENT AND CONCRETE RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1233-1237
  • Keywords: thermal treatment, mechanical properties, refractory cement, concrete
  • Dokuz Eylül University Affiliated: No

Abstract

Physical and mechanical tests are applied to the samples prepared from bauxite/fused brown corundum 50%, SiC 15%, calcined alumina 15%, reactive alumina 10%, calcium aluminate cement (CAC) 5%, micro silica 5%. Phases of the samples heat-treated at I 10 degreesC, 1000 degreesC, and 1500 degreesC are investigated by using X-ray diffraction (XRD) and scanning electron microscopy SEM) techniques. Bauxite-based samples, which have higher porosity than corundum-based samples, show higher cold crushing strength (CCS) and modulus of rupture (MOR) than corundum-based samples. Samples fired at 1000 degreesC have higher CCS than those fired at 1500 degreesC for both types of samples. The same behavior is not observed for modules of rupture of bauxite-based samples, but only observed for fused corundum-based samples. It is found that hot modules of rupture of bauxite-based samples at 1000 degreesC and 1500 degreesC are better than corundum-based samples. The possible reason for better properties of bauxite-based samples is the new mineral phase formation obtained by XRD results and pore size distribution. (C) 2001 Elsevier Science Ltd. All rights reserved.