Ceramics-Silikáty 38, (1) 1 - 3 (1994)

By the method of high-temperature dilatometry were studied the properties of thermal insulating materials on the basis of a calcium hydrosilicate binder and fibrous microreinforcement. New fibre types for the replacement of asbestos can influence negatively the hydrothermal hardening of the binder. The shrinkage values upon the burning out of cellulose fibres are negligeable in comparison with the shrinkage growth at a lower degree of the crystalline development of the binder. On the basis of dilatometric data from the high-temperature dilatometer NETZSCH - 402 E, processed on the HP 9820 A computer, was carried out a selection of suitable cellulose fibre types and the temperature interval of the application of the prepared materials was defined. High-temperature dilatometry seems to give more informations about calcium hydrosilicate matrix of composites than XRD and SEM methods.