Development of concrete mix composition using recycled aggregates and analysis of their physical-mechanical properties
Keywords:
recycling, concrete, aggregate, demolition waste, waste disposalAbstract
The article presents the results of the development of concrete mix compositions using recycled aggregates and analyzes the physical and mechanical studies of the developed materials.
In the conditions of significant destruction of the infrastructure of Ukraine caused by military operations, the issue of recycling construction waste or its use as secondary raw materials is becoming particularly relevant. One of these areas is the use of recycled aggregates in the composition of concrete. This not only solves the problem of waste disposal, but also opens up new prospects for the creation of materials with improved operational properties.
Therefore, the purpose of the study was to determine the influence of recycled raw materials on the main physical and mechanical properties of concrete, as well as to substantiate the feasibility of its widespread use in the construction industry.
The work developed several variants of concrete mix compositions in which natural aggregates were partially or completely replaced by recycled ones. When formulating the formulations, the specific properties of recycled aggregates were taken into account, such as the uneven shape of the grains, porosity, and the presence of residual cement stone on the surface of the particles. Experimental studies were conducted to assess the main physical and mechanical characteristics of the developed concretes, including compressive strength, ease of placement, preservation of properties over time, frost resistance, and water resistance.
The results of the study showed that, provided that the composition of the mixtures is correctly selected and the secondary materials are processed appropriately, it is possible to achieve indicators that correspond to or even exceed the characteristics of conventional concrete. Thus, the conducted studies show the possibility of using recycled aggregates in the composition of concrete. The results obtained can become the basis for further research and the introduction of technologies for the reuse of construction waste into construction practice, which is especially important for the modern reconstruction of Ukraine in the conditions of post-war recovery.
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