Sample of ancient Roman maritime concrete from Pozzuoli Bay near Naples, Italy. Its diameter is 9 centimeters, and it is composed of mortar formulated from lime, volcanic ash and chunks of volcanic ...

Mike Heilig, who installs tile for a living, spends an estimated 1,000 hours on each table. "They're one of a kind," said Heilig, who found the rocks, in the form of core samples, at old abandoned ...

Concrete contractors who are required to perform concrete core strength tests have a few options when it comes to core drilling. They can hire a testing lab or concrete sawing and drilling company to ...