What: Basilisk concrete
Who: Henk Jonkers, Bart van der Woerd, Jordy Kern en Renée Mors
Where: Delft
Since: 2014
Source: Basilisk

Self healing concrete

One of the characteristics of concrete is that it ruptures. With a good design and good performance this tearing can be limited, but small tears can cause problems too. For example, torn concrete is no longer waterproof and is less resistant to freezing and thawing. Also, the durability of torn concrete greatly decreases. This not only leads to serious damage, but also to high maintenance costs and obstacles. Basilisk has a number of unique products that enable self-repairing concrete. The technology has been developed and patented in collaboration with TU Delft.

Micro organisms

Basilisk uses the properties of microorganisms. The company adds these organisms to concrete. In the presence of water, oxygen and proper nutrition, the bacteria will multiply. This causes the bacteria to be present in a large number and well distributed in the tear. The bacteria will convert the nutrient present into calcium carbonate (limestone), which will slowly close the crack.

With an annual output of over seven billion cubic meters, concrete is the most widely used construction material in the world. Due to the fact that a lot of CO2 is released in the production and transport of concrete, it is important that concrete is durable. Basilisk’s self-restoring concrete extends the life span of constructions.