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Introduction Monolithic refractory concretes with calcium aluminates cement as binding agent have been manufactured for over 80 years now. First, refractory concretes were based on high cement formulations. Today, accent is on
Abstract
Calorimetry has been used in the investigations of calcium aluminate materials produced as a binder for aluminate-corundum composites of high refractoriness. The kinetics and of hydration process was thus characterized and the optimum compositions of initial binders and cement-corundum refractory filler blends could be selected for further tests. The acceleration of heat evolution - the shortening of so-called induction period and relatively high heat output in the presence of corundum was observed. It means the acceleration of hydration process, that is early crystallisation of hydration products and subsequent further dissolution of initial anhydrous aluminate phases. In the presence of fine grained corundum particles these phenomena should be attributed to the nucleating effect of fine corundum particles.
Wu G. Y, Shivaroj S. K., Ramakrishnan V. (1989), Flexural fatigue strength, endurance limit, and impact strength of fiber reinforced refractory concretes. Fiber Reinforced Cements and Concretes: Recent Developments, Elsevier, New York, pp. 261
either in the prolonged workability of the material or in more rapid strength development. Some efforts were made to use the FCC catalyst in the refractory concrete produced on the basis of CAC40 with the additive of the Castament FS-40 type
Introduction Calcium aluminate cements (CAC) are special hydraulic binders, especially used in refractory concretes. Castable refractories containing CAC are used in different furnaces lining applications in ceramic, cement
