The paper highlights the relevance of using composite materials for reconstruction of heavy-duty concrete and reinforced concrete flooring in industrial buildings, stating that at the current stage of construction development special attention is paid to the use of steel fiber concrete flooring, as this material allows for reconstruction of industrial floors with minimum financial and labor expenditure. The novelty of the research lies in the fact that the adhesive between the flooring to be restored and reinforced and the new steel fiber concrete layer is a composite polymer-bitumen material with cement and graphite powder additives, which was previously experimentally developed by the authors. This material, given an adequate thickness, also serves as a structural spacing to level the surface of the underlying layer and reduce friction under the bottom of the upper steel fiber concrete layer and the existing floor. The paper describes the reconstruction workflow. The composition of the steel fiber concrete layer has been assumed based on the research of other authors. Although experiments proved the integrity and strength of the flooring after its reconstruction with the new technology, it is noted that the final characteristics of the proposed floor structures and workflow can only be assessed in the course of normal use, which can be the basis for further research aimed to optimize the thickness of the suggested composite layers. The experiment delivered certain labor and material cost figures for evaluating the economic efficiency of the use of the composites described below in the concrete flooring reconstruction.
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