Abstract
The paper presents the results obtained in the course of a study on the concrete made of aggregate obtained from wastes of sanitary ceramics. Previous examinations proved high in strength and durability of concrete of this type, and it showed a resistance to high temperatures. The material was classified as a fireproof concrete. While searching for the optimal applications of such concrete, a series of examinations and analyses on its thermal energy storage (TES) properties were performed. This paper describes the two-stage experiment on the thermal behavior of the concrete made with sanitary ceramic wastes during cooling processes in comparison to different building materials subjected to the same thermal conditions. On the basis of the thermal, infrared analysis, and suitable calculations, the thermal power and the ability of the composite to store thermal energy was estimated. Finally, it was stated that the concrete made of sanitary ceramic waste aggregate and alumina cement can be recommended as a heat-accumulating material, and in combination with high durability can be used, e.g., for the construction of fireplace bodies.
Highlights
The increase in the usage of concrete around the world is associated with the increased demand for raw materials necessary for its production
The results indicate that the recycled refractory concrete may have the ability to accumulate heat energy, which is associated with new methods of its potential use, e.g., for the fireplace body
The aim was to assess the thermal power in temperature similar to these prevailing in the fireplace
Summary
The increase in the usage of concrete around the world is associated with the increased demand for raw materials necessary for its production. It was shown that by replacing 20–25% of the gravel aggregate with the crushed sanitary ceramics, the concrete’s strength can be increased with respect to the traditional concrete. The results of other studies [12,13,14,15,16,17,18] confirm the usefulness of the ceramics as the recycled aggregate to concrete. In this study selected materials have been investigated in the two-stage experimental program, with the results allowing the determination of the thermal power of the fireproof concrete with the ceramic aggregate. Analysis of the thermal parameters of various types of concrete is subjected to a number of studies [32,33,34,35,36], the results of which indicate the possibility of using the cement composite as the TES material. Currently stored wastes will be consumed, and secondly, the consumption of natural aggregates will decrease
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