Organizational and technological foundations for selecting a method of filling openings in frame civil buildings

Abstract

Purpose. The purpose of this study is to determine the degree of influence of adverse economic factors on the formation of the estimated cost of external wall infill systems in cast-in-place reinforced concrete frame residential buildings.

The methods. The study is based on a comparative analysis of the estimated cost per 1 m³ of external wall infill systems constructed using different infill technologies. Cost estimation was performed in accordance with the current Ukrainian construction cost estimating standards by determining the direct costs of construction materials, labor, and the operation of construction machinery and equipment. The obtained results were used to evaluate the economic feasibility of the investigated technologies.

Findings. The estimated cost per 1 m³ of external wall infill systems constructed using different infill technologies for cast-in-place reinforced concrete frame buildings was determined. A comparative analysis of the obtained results made it possible to identify the most economically efficient solution for application in cast-in-place reinforced concrete frame civil buildings.

The originality. The study establishes the patterns of the influence of current adverse economic factors caused by martial law, the relocation of enterprises and population, disruptions in logistics supply chains, and increasing energy costs on the estimated cost of external wall infill systems in cast-in-place reinforced concrete frame residential buildings. It was found that transportation and logistics costs, rising prices of construction materials, and labor shortages have the greatest impact on the increase in estimated construction costs. The economic feasibility of using autoclaved aerated concrete (AAC) blocks and efficient hollow masonry units as the most cost-effective structural solutions for external wall infill under current economic conditions has been substantiated.

Practical implementation. The research findings can be used in the preparation of design and cost estimate documentation, as well as in selecting economically efficient technologies for external wall infill systems in cast-in-place reinforced concrete frame residential buildings under current economic conditions.