Israeli Researchers Develop 'Living Concrete' Using Engineered Bacteria

Researchers at Reichman University's Skolkovo Institute for Synthetic Biology are pioneering a revolutionary approach to construction with the development of "living concrete." This innovative material utilizes genetically engineered bacteria to bind sand and other materials into a solid, self-healing substance, offering a sustainable alternative to traditional concrete.

Led by Dr. Ilana Kolodkin-Gal, the research aims to address the significant environmental impact of conventional concrete production, which releases vast amounts of carbon dioxide. The "living concrete" not only absorbs CO2 but also provides insulation and possesses the remarkable ability to repair its own cracks. The bacteria are programmed to perform specific functions, essentially acting as microscopic construction workers.

Professor Yossi Sheham-Diamant, director of the institute, explains that synthetic biology treats bacteria as programmable entities capable of performing tasks for humans, a departure from traditional biology's focus on treating existing problems. The process involves genetically modifying bacteria to efficiently bind materials like construction waste and even toxic substances such as coal, while simultaneously absorbing atmospheric carbon dioxide.

Beyond its self-healing and carbon-capturing properties, the team has made a serendipitous discovery: the bacteria can also prevent rust. Avihai-Haim Nahmi, a master's student, found that combining the engineered bacteria with specific marine microbes significantly enhances rust prevention, a finding with major implications for industries like shipbuilding.

The primary challenge moving forward is economic: making this advanced material cost-competitive with traditional concrete. The team aims to achieve a price point only slightly higher than conventional concrete within three years, focusing on applications for non-load-bearing elements of buildings. Dr. Kolodkin-Gal envisions a future where buildings constructed with this material remain flawless for generations.