Driveways that use gravel are extremely common and have been for hundreds of years. Why? Because they are durable, easily repaired, attractive, ecologically sound, long-lived, and affordable. Hard to ...

The modern world is built with concrete. Humans use more concrete annually than any other material besides water. Yet cement, the key component of concrete, is the source of as much as 10% of all ...

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 ...