Modification of fine-grained concrete for the construction of thin-walled piles using technogenic waste
Year: 2025
Type: article
Abstract: Problem. The high cost of Portland cement production, coupled with the intensive use of energy resources and significant CO₂ emissions, creates the necessity to reduce its consumption in concrete production. Simultaneously, large volumes of fine technogenic waste are being accumulated by various industrial enterprises, including ferrosilicon production, thermal power plants, and construction materials manufacturing. These micro-dispersed by-products are often underutilized, despite their potential to serve as functional additives that can enhance the physical and mechanical properties of concrete mixtures. Objective. The study aims to develop and optimize a modified fine-grained concrete mixture by incorporating technogenic waste for the construction of bored piles formed through layered pressing within drilled shafts. Methodology. Experimental tests were carried out in accordance with DSTU B V.2.7-187:2009. The physical and mechanical characteristics were determined on prism-shaped samples measuring 160×40×40 mm. Compressive and flexural strengths were evaluated to assess the effectiveness of the proposed mixture. Results. A new composition of fine-grained concrete was developed using a combination of wet gas cleaning sludge from ferrosilicon production, expanded clay dust, and sludge from water-softening systems. The optimal ratio of these components was experimentally determined, leading to improved strength parameters and a reduction in cement usage. Scientific novelty. For the first time, the combined influence of three types of fine technogenic waste on the structural formation and strength development of fine-grained concrete was comprehensively studied. Practical significance. The use of these industrial by-products in concrete contributes to lowering production costs, enhancing material performance, and reducing the environmental footprint of construction practices.
Institution: State Biotechnological University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4416911237