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Current issue

ELEKTRO 12/2016 was released on December 7th 2016. Its digital version will be available on January 6th 2017.

 

Topic: Measurement, measuring devices and measurement engineering; Testing and diagnostics

 

Main Article

Lithium traction batteries for electric mobility (final part 2)

SVĚTLO (Light) 6/2016 was released on December 5th 2016. Its digital version will be available on January 5th 2017.

Interiors lighting
Colloquium Interiors 2016 – the fifth anniversary
Cooperation of indoor interior and lighting 

Standards, regulations and recommendations
New standards for road lighting

Concrete That Heals Itself

02.06.2015 | CleanTechnica | cleantechnica.com

Concrete and bacteria are not often seen as sharing the same construction armchair, that is, unless you happen to be discussing concrete that heals itself. Henk Jonkers from Netherlands-based Delft University of Technology has created bioconcrete, a product that can heal its own cracks and faults.

Jonkers says he originally began work on the bioconcrete when he was approached by a concrete technologist who wondered whether the safety of concrete could be improved using a biological solution.

It has taken Jonkers and his team three years to produce this self-healing prototype, needing to overcome the most obvious obstacle: finding bacteria that can survive the harsh environment of concrete.

“It’s a rock-like, stone-like material, very dry,” said Jonkers. To address this dry hardship, the team picked bacillus bacteria for its hardiness and longevity. The bacteria and its food source, calcium lactate, are packed into tiny capsules that dissolve when water enters the concrete cracks. Once released, the bacteria consume the calcium lactate, causing a chemical reaction that creates limestone, which then fills in the gaps.

Read more...cleantechnica.com

Image credit: European Patent Office

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