Abstract
Aluminium silicate fibres are known for their low thermal conductivity and specific heat capacity, high thermal shock resistance, low weight and excellent corrosion resistance. However, their use in cement-based composites for high-temperature applications has been very limited. In this paper, the effect of randomly dispersed alumina-silicate fibres on the high-temperature resistance of cement composites is analysed as a function of the mix composition. The measurement of the basic physical, mechanical, hygric and thermal properties shows the most favourable results for the composites containing calcium aluminate cement and basalt aggregates, the fibre dosage of 1 % being an optimal solution. A comparison with the results reported by other researchers shows that in the temperature range up to 1000 °C, aluminium silicate fibres perform better than steel, glass and carbon fibres for both Portland cement and calcium aluminate cement matrices, and their effect is similar to that of basalt fibres.
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