This Concrete-Eating Robot Can Recycle An Entire Building On The Spot
More concrete is manufactured than any other
material on the planet. Luckily, the ERO robot has a healthy appetite.
Knocking down a concrete building usually takes brute force: Wrecking
balls, huge excavators, or explosives rip apart walls while fire hoses spray
water to keep the clouds of dust down. It’s an energy-intensive process, and
after everything’s been torn apart, the concrete often ends up in a landfill or
has to be trucked to a recycling facility. But a new concrete-erasing robot may
eventually transform the messy business of demolition.
The ERO
(short for "erosion") robot uses water to disassemble concrete and
then sucks all of the separate components—cement, sand, and aggregate—neatly
into different packages for reuse. "High-pressure water jets attack the
micro cracks on the concrete surface, making it come apart," explains Omer Haciomeroglu, a student at Umeå
Institute of Design in Sweden, who designed the robot last year. "It
leaves the metal rebar inside naked and ready for reuse."
Since all
the materials can be separated on site, the process avoids the costs and
pollution of transporting heavy chunks of concrete and metal to recycling
plants. Haciomeroglu envisions a new business model: When a building comes
down, the demolition crew could set up a station nearby to turn the materials
into new prefab building blocks, and then those could be sold directly to
someone constructing a new building in the neighborhood.
"You
can reutilize it within the city, without actually sending it far away to be
crushed down, separated, and all of that mess," he says.
The machine runs on electric power,
and actually recollects some of its own energy; as the vacuum sucks recycled
concrete down a tube, the moving air generates electricity that the system can
reuse.
The design
is just a concept for now, though Haciomeroglu plans to built it and is already
in conversations with manufacturers. Once he has a partnership with a company,
the next step will be building and testing a prototype, which may take two or
three years.
There's already plenty of demand.
More concrete is manufactured than any other material on the planet. And since
it tends to last only 40 to 60 years, there's quite a bit of old concrete
coming down all the time; in the U.S. alone, over 300 million metric tons of
concrete waste are created each year.
One of the biggest markets for the
ERO may be China, where buildings are being razed at an unprecedented rate to
make way for new construction, and only 5% of building waste is currently
reused.
"In Asia, there's a lot of
potential," Haciomeroglu says. "But this can be used everywhere. Even
in Europe, they’re demolishing a lot of concrete buildings and they don’t know
how to recycle, so they’re wasting that valuable material. ERO is a smarter way
to do it. I wanted to design a role-model product that would show the industry
how to approach demolition in a different and provocative way."
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