The solution came in 1981 with the invention of in Japan. These "comb-shaped" molecules revolutionized construction. They act like microscopic magnets, wrapping around cement particles and pushing them apart through electrostatic and steric repulsion. This allows concrete to be "fluidized" exceptionally well without adding extra water, leading to the creation of:
The history of admixtures is as old as the Roman Empire . Long before modern chemistry, Roman builders experimented with organic "potions" to make their concrete more workable and durable. They added , blood , and eggs to their mixes. These proteins acted as primitive air-entraining agents, helping the concrete withstand freeze-thaw cycles and making it easier for laborers to pour into the massive forms of the Pantheon. The Chemical Revolution: Master of Flow Science and technology of concrete admixtures
Achieving compressive strengths over 100 MPa—strong enough to build the world’s tallest skyscrapers, like the Burj Khalifa . The Modern Toolkit: 7 Essential Powers The solution came in 1981 with the invention of in Japan