Abstract
This paper describes the effect of cyclic elevated temperature loading on refractory slabs made from high performance, fibre reinforced cement composite. Slabs were produced from aluminous cement-based composites, reinforced by different dosages of basalt fibres. The composite investigated in this study had self-compacting characteristics. The slabs used were exposed to different thermal loading – 600 °C, 1000 °C, six times applied 600 °C and 1000 °C. Then, flexural strength was investigated in all groups of slabs, including group reference slabs with no thermal loading. The results show that the appropriate combination of aluminous cement, natural basalt aggregate, fine filler and basalt fibres in dosage 1.00% of volume is able to successfully resist to cyclic temperature loading. Tensile strength in bending of these slabs (after cyclic temperature loading at 600 °C) achieved 6.0 MPa. It was demonstrated that it is possible to use this composite for high extensive conditions in real industrial conditions.
Highlights
IntroductionAccording to the way of their production, refractory composites can be divided into shaped ones (bricks or similar precast elements) and non-shaped (monolithic) ones
Refractories can be classified into many categories
Refractory cement composites are characterized by excellent toughness, mechanical properties, thermal shock resistance, low permeability and higher porosity, etc. [2, 3]
Summary
According to the way of their production, refractory composites can be divided into shaped ones (bricks or similar precast elements) and non-shaped (monolithic) ones. From the global point of view, refractory composites should be able to resist the action of elevated temperature. Refractory cement composites are characterized by excellent toughness, mechanical properties (compressive and flexural strength), thermal shock resistance, low permeability and higher porosity, etc. Fibre reinforced cement composites suitable for high temperature applications have to satisfy several conditions. Cohesion between the fibres’ surface and hydration products must not be distorted by the effect of a thermal load [4]. These composites are suitable for industrial application in an environment with elevated temperature. We can find a possible application in the field of building materials (e.g., chimney of fireplace bricks)
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