Scientists from the Institute of the World Ocean of the Far Eastern Federal University (FEFU) have developed a technology for soil reinforcement using bacteria. It can be used for the construction of roads and industrial facilities in the Russian Arctic, the university's press service reported.
The biocementation method allows loose sand to be transformed into a strong foundation suitable for construction.
The development will be especially in demand in northern regions, where low temperatures cause soil deformation, and roads and pipelines require regular repairs.
FEFU explained that scientists isolated special bacteria from coastal soils that produce calcium carbonate. This mineral is composed of chalk, limestone, and shells.
Microorganisms, along with a nutrient solution, are added to the soil. They produce calcite crystals that fill the voids between soil particles and glue them together. Loose soil literally turns into stone. Researchers have already refined the technology in laboratory conditions.
The university added that this method has great potential. So-called biocement can be used by oil and gas companies to reinforce wells on the Arctic shelf. In addition, bacteria are capable of binding heavy and radioactive metals, converting them into elements that do not dissolve in water and do not enter the soil.