MOSCOW — Researchers at Russia's Far Eastern Federal University (FEFU) have developed a bacteria-based soil stabilization technology that converts loose sand into a solid, stone-like material, offering a new approach to building roads, pipelines, and industrial infrastructure in the Russian Arctic.
The technology is based on Microbial-Induced Calcite Precipitation (MICP), also known as biocementation, a process that uses naturally occurring bacteria to produce calcium carbonate (calcite)—the mineral found in limestone, chalk, and seashells. The calcite binds sand grains together, creating a strong, load-bearing foundation without using conventional cement-based materials.
How the Technology Works
Scientists isolate naturally occurring bacteria from coastal soils and combine them with a specially prepared nutrient solution before applying the mixture to sandy ground.
As the bacteria consume nutrients, they trigger a biochemical reaction that forms calcium carbonate crystals. These crystals fill the gaps between sand particles and act as a natural cement, binding the grains into a dense, stone-like structure. Researchers say the level of soil strengthening can be adjusted by controlling factors such as bacterial concentration, nutrient supply, and treatment time, allowing the process to be adapted for different engineering needs.
Addressing Arctic Construction Challenges
The Russian Arctic presents significant construction challenges because repeated freeze-thaw cycles can weaken road foundations and damage pipelines and industrial infrastructure. Conventional asphalt and concrete surfaces often crack, shift, or deform under these conditions.
Laboratory tests have shown that soil treated through the MICP process gains higher mechanical strength and improved resistance to water erosion, creating a more stable foundation for infrastructure. The method could be used beneath roads, railways, pipelines, storage facilities, industrial platforms, and other structures built on sandy ground.
Environmental Benefits
Researchers say the biological approach offers environmental advantages over traditional soil stabilization methods. Unlike conventional cement production and some chemical grouting techniques, the process uses naturally occurring microorganisms and does not produce harmful by-products during soil strengthening.
The technology may also help clean contaminated sites. According to the researchers, the bacteria can bind heavy metals and radioactive elements by converting them into water-insoluble mineral forms, helping reduce the movement of pollutants through soil and groundwater.
Potential Applications
The technology could support infrastructure projects in remote Arctic regions, including oil and gas operations, by reinforcing foundations for wells, pipelines, processing facilities, and transport infrastructure. Using locally available sandy soils may also reduce the need to transport large volumes of conventional construction materials to isolated locations.
MICP has been studied internationally for applications such as soil stabilization, erosion control, foundation improvement, and concrete crack repair. The FEFU research focuses on adapting the technology for Arctic conditions, where stable ground is critical for long-term infrastructure performance.
Scientists continue laboratory and field testing to evaluate the long-term durability of the treated soil under Arctic conditions. If larger-scale trials are successful, the technology could provide a more sustainable option for strengthening infrastructure in northern regions.
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