DRY BUILDING MIXTURES BASED ON RECYCLED CONSTRUCTION WASTE PRODUCTS FOR THE RESTORATION OF BUILDINGS AND INFRASTRUCTURE
DOI:
https://doi.org/10.31650/2786-6696-2026-17-42-54Keywords:
dry building mixtures, construction waste, recycling, repair and restoration works, post-war reconstruction, technological and performance properties, resource conservation, building materials.Abstract
The paper investigates the potential use of recycled construction waste products in dry building mixtures intended for the restoration of buildings and infrastructure. The relevance of the study is determined by the considerable quantities of construction waste generated as a result of the demolition of obsolete structures, reconstruction of buildings, and destruction caused by military operations in Ukraine. The rational use of secondary mineral raw materials represents a promising approach to resource conservation, reduction of environmental impacts, and improvement of the efficiency of post-war reconstruction.
The current state of construction waste recycling in the production of building materials is analysed. The potential application of fillers derived from crushed concrete, brick waste, waste glass, and crushed limestone by-products as components of dry building mixtures is considered. The physical and mechanical characteristics of the raw materials are presented, and a series of experimental compositions with different contents of secondary components is developed.
The effect of the amount of recycled materials on the technological and performance properties of dry building mixtures is evaluated. It is established that an increase in the proportion of secondary components contributes to an improvement in the water-retention capacity of the mixtures and a reduction in their average density. At the same time, excessive amounts of recycled raw materials result in a decrease in the strength characteristics of the material. Based on the experimental results, optimal mixture compositions are determined, providing compressive strength of up to 29.5 MPa, flexural strength of up to 6.4 MPa, and adhesion strength of up to 0.86 MPa.
The possibility of reducing cement consumption by up to 25% in the optimal compositions without a significant deterioration in the performance properties of the material is investigated.
The obtained results confirm the feasibility of using the developed dry building mixtures for repair and restoration works, the construction of levelling layers, the repair of concrete and brick surfaces, as well as the restoration of residential, public, and engineering and transport infrastructure.
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