Hidden Microbes in Concrete Offer New Way to Detect Structural Deterioration
Researchers from Hiroshima University and Kyoto University have identified distinct microbial zones within concrete. These internal microbial communities, introduced through raw materials, are largely isolated from those on the surface once the concrete hardens. Significantly, the DNA signatures of these microbes have been found to survive the 70°C heat generated during routine core sampling.
The groundbreaking findings, published in Case Studies in Construction Materials, suggest a promising new application for these hidden biological elements.
These internal microbial communities could potentially serve as early-warning indicators of hidden structural deterioration.
Researchers propose that this discovery could facilitate the development of simpler diagnostic tools. This innovation aims to make structural health assessments more accessible to non-specialists, including building managers, general maintenance staff, and residents. This is particularly relevant in contexts such as Japan, where the oversight of aging buildings is increasingly decentralized.
The primary motivation behind this research is to democratize concrete structure maintenance. China Kuratomi, a study first author and doctoral student at Hiroshima University, indicated that the goal is to enable a wider range of people to understand building conditions through various indicators, reserving detailed diagnoses for specialists when truly required.