Scientific American is the authority on science and technology for a general audience, with coverage that explains how research changes our understanding of the world and shapes our lives. First ...

Concrete has been used as a strong, durable building material for thousands of years, dating back to many ancient concrete structures that are still standing to this day. Yet, it has one fundamental ...

Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture used to create permanently waterproof concrete. KIM lowers the permeability of concrete, and is used in place of surface applied ...

Concrete blocks. Ever since manufacturers developed techniques to make them cheaper than traditional clay-fired bricks, concrete blocks have been one of our most ubiquitous construction materials.