Outdoor Testing For Self-Healing Concrete
Concrete that contains limestone-producing bacteria will undergo outdoor testing this winter. The bacteria are activated by corrosive rainwater working its way into the structure.
(Experimental concrete patches up cracks by itself)
"For durability reasons - in order to improve the service life of the construction - it is important to get these micro-cracks healed," Dr Jonkers told BBC News.
Bacterial spores and the nutrients they will need to feed on are added as granules into the concrete mix. But water is the missing ingredient required for the microbes to grow.
Concrete is the world's most popular building material, but cracking is a problem
So the spores remain dormant until rainwater works its way into the cracks and activates them. The harmless bacteria - belonging to the Bacillus genus - then feed on the nutrients to produce limestone.
The bacterial food incorporated into the healing agent is calcium lactate - a component of milk. The microbes used in the granules are able to tolerate the highly alkaline environment of the concrete.
"In the lab we have been able to show healing of cracks with a width of 0.5mm - two to three times higher than the norms state," Dr Jonkers explained.
The outdoor tests should begin [in six months]; the team is already talking to several construction firms that could provide help.
The concrete will then have to be monitored for a minimum of two years to see how it behaves in this real-world setting.
SF writer J.G. Ballard wrote about self-healing buildings with plastex walls in his 1962 short story The Thousand Dreams of Stellavista:
It was a beautiful room all right, with opaque plastex walls and white fluo-glass ceiling, but something terrible had happened there. As it responded to me, the ceiling lifting slightly and the walls growing less opaque, reflecting my perspective-seeking eye, I noticed that curious mottled knots were forming, indicating where the room had been strained and healed faultily.
Building, heal thyself - with these links:
Scroll down for more stories in the same category. (Story submitted 11/10/2012)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 0 )
Related News Stories -
'Metallic Wood' Strong Like Titanium, Floats In Water
'A metal... light as cork and stronger than steel...' - Edgar Rice Burroughs, 1929.
Self-Healing Material Pulls Carbon Out Of The Air
'... could seal the punctures.' - Raymond Z. Gallun, 1951.
Shapeshifting Materials Transform By Light
'Its lines wavered, flowed, and then painfully reformed.'- Philip K. Dick, 1957.
Superstrong Multilayer Metal-Graphene Composite Material
Negligible increase in weight increased material strength by hundreds of times.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Zephyr Solar-Electric Stratospheric Drone
'The planes flew continuously, twenty-four hours a day...'
Robot Hummingbird Hovers Biomimetically
'With a buzz... it started out on its journey.'
Harvest Water From Air With Sunlight
'The atmosphere yielded its moisture with reluctance.'
Capitalist Big Brother Co-Opts Regular Big Brother
'It was even conceivable that they watched everybody all the time.'
A Floating Cosmodrome
'...a single perfectly level platform, which rose so high above the water that it was not splashed by the waves.'
First Artificial Memory Formed In Animals
'Is an extra-factual memory that convincing?' Quail asked.
Maintain Your Megastructure
Megastructures have repair robots, which have repair robots, ad infinitum.
Venezuelans Teaching Your Self-Driving Car
‘She wouldn't stop until Antar had told her everything he knew...’
Robothread Robotic Worms Crawling Through Your Brain
Perfect for clot-busting in the human brain. No Raquel Welch and no lasers, though.
Vantablack BMW X6 Is Douglas Adams Approved
'It's so... black!' said Ford Prefect.
Humanoid Robot's Muscles Biomimic Ours
'It is remarkable that the long leverages of their machines are in most cases actuated by a sort of sham musculature...'
Animatronic Robotic Baby Exposed
'The birth of Machine, my robot child...'
Beijing HaiDiLao Robotic Hotpot Restaurant Now Flavored By Artificial Intelligence
'Kantos Kan led me to one of these gorgeous eating places where we were served entirely by mechanical apparatus.'
Plants of the Future - What Should They Be Like
'He almost choked in his astonishment. Mashed potatoes and brown gravy!'
China Deploys Robot Traffic Police
'The robot came up smooth and fast as a rocket...'
Better Than Dune Chromoplastic? This Guy Might Have Done It
'But when Old Father Sun departs, the chromoplastic reverts to transparency in the dark.'
More SF in the News Stories
More Beyond Technovelgy science news stories