| Effect of Reactive Alumina on the Physico-Mechanical
Properties of Refractory Castable |
Subhojeet Ghose1, Chirag Saigal1, Atul Maldhure and Swapan Kumar Das*
pages 113-118
DOI:10.1080/0371750X.2013.794024 |
| Abstract |
| The effect of reactive alumina and its different proportions on physico-mechanical properties of conventional high
alumina castables were studied. The castables with different percentages of reactive alumina were prepared by using
calcium aluminate cement as a binder and various refractory properties of the prepared castables, i.e. apparent porosity,
bulk density, cold crushing strength, hot modulus of rupture were studied. The mineralogical analysis was done by
X-ray diffractometry, whereas morphological analysis was carried out by scanning electron microscopy. The
results showed that the castable with high percentage of reactive alumina hydrated early as well as developed early
sintered strength due to its faster rate of hydration and higher reactivity at lower temperature. The hot modulus of
rupture was also found to be higher in the castable with more reactive alumina. Mineralogical analysis showed well
developed mullite and corundum phases in the refractory concrete which was supported by morphological analysis. |
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