The presented article investigates the reuse of thermal insulation materials after the end of their primary life, especially regarding expanded polystyrene and mineral wool, for the use in the form of a light filling material intended for the cavities of ceramic bricks. Several suitable binders have been tested and their quantity is being optimized, to ensure the required handling strength, adhesion to the surface of the ceramic brick, suitable viscosity, long durability, moisture resistance and at the same time to achieve a sufficiently low value of the thermal conductivity coefficient.
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