Effectively any shape is possible thanks to the 3D printing process, while the results are strong and durable, relying on the physics of jamming and collective strength of composited stones. The reversibility of the process makes this a far more eco-friendly way to build rigid structures from durable materials that still dismantle on demand.
via Reversible Concrete: 3D Printing for Easy Deconstruction & Reuse | Urbanist.
BOSTON — A Billerica waste hauling company has paid $62,500 to settle claims that it illegally dumped construction and demolition waste at an unauthorized site in Methuen.The attorney general says W.L. French Excavating Corp. violated Massachusetts state law by dumping 29 loads of waste, including concrete, bricks and asphalt.
via 2 waste removal companies targeted in state crackdown | Boston Herald.
Ugo Bardi: But what’s impressive is the growth of “construction minerals” which stands for sand, rock, cement and the like…. Think about that: 25 billion tons per year corresponds to more than three tons per person. Think of a ten kg cube [22 lbs] of rock and cement delivered to you and deposited in front of your door every morning, every day of the year.
via The concrete industry digs up 3 tons of rock per year for every person on Earth : TreeHugger.