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 ...

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 ...

His Sanford garage is filled with rock core samples and the works of art he s created from them. Mike Heilig can see beauty in a box of rocks. His Sanford garage is filled with rock core samples and ...

SPRINGFIELD -- At minimum, concrete used in residential structures should have a compression strength of 2,500 pounds per square inch. For some of the samples of concrete tainted with the mineral ...

A 19-story building under construction in San Jose, Calif., will be the second in the country to be built with a concrete-filled composite plate shear wall system, which was first used successfully ...