Based on the gas displacement method, this article describes a method for determining the optimal gas type and pressure for measuring cement density, providing a reliable method to characterize porous ...

Nobody knows who did it first, or when. But by the 2nd or 3rd century BCE, Roman engineers were routinely grinding up burnt limestone and volcanic ash to make caementum: a powder that would start to ...

A photobioreactor, which looks like a large vat of blue liquid with pink light shining, at Prometheus Materials. Stimulated by light, microbes in this bioreactor multiply and react carbon dioxide with ...

Concrete is one of the world’s most commonly used materials, and unfortunately its production is a major source of carbon dioxide in the atmosphere. Now, engineers at Purdue University have developed ...

A building block in most construction projects, concrete is responsible for about 8 percent of global carbon emissions. Several companies are working to create a greener mix. Credit... Supported by By ...

Q: A water leak caused me to have to remove drywall in my basement. I found rows of holes five-eighths of an inch in diameter in my concrete walls. Water is dripping through some of them. What created ...