By Adele Peters – 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. more> http://tinyurl.com/n37c5rl