Concrete Is Most-Used Material After Water

From towering skyscrapers to humble sidewalks, the modern world is quite literally built with concrete. Its ubiquity stems from a powerful combination of strength, durability, versatility, and relatively low cost, making it the go-to material for the foundations, roads, and bridges that underpin our civilization. The sheer scale of its use is difficult to comprehend, but it forms the very bedrock of global infrastructure, shaping the cities and landscapes we inhabit every day.

While we often think of it as a modern invention, the concept of concrete dates back to ancient civilizations. The Romans, in particular, were masters of the craft, using a mixture of volcanic ash, lime, and seawater to create structures of incredible longevity. The iconic dome of the Pantheon in Rome, still standing after nearly two millennia, is a testament to their engineering prowess. Modern concrete primarily uses Portland cement, a 19th-century innovation that, when mixed with water, sand, and gravel, triggers a chemical reaction called hydration. This process doesn't simply dry the material; it forms a dense, crystalline matrix that locks the components together into a formidable, stone-like mass.