Leroy Rellergert has been in construction all his adult life. And for all of his adult life the Perryville, Mo., man has known that that the process to build concrete steps has been a drain on a ...

Q: The corner of one of the concrete steps leading to the front entrance of my building has broken off. It’s the top step of four. Is it possible to repair it without replacing the whole staircase? A: ...

Q: I have some concrete steps leading to my front door, and the bottom step has been damaged. The corner of the step is missing. I would like to repair it so that it is safe and attractive. How do I ...

Concrete is one of the most widely used construction materials, but its production is a significant source of carbon emissions due to the energy-intensive process of cement manufacturing. As the ...

We didn’t notice [Nikita]’s post about building a concrete 3D printer, a few months ago, but the idea seems sound: build a basic CNC XY axis and then add a mortar pump and hose to deposit concrete.