Modern concrete can break up within 50 years. However, Roman concrete structures last for thousands of years because they used volcanic ash, which slowly transforms into aluminum tobermorite. ¹⁾

The world's tallest building, the Burj Khalifa, is made of 330,000 m³ of concrete reinforced with 55,000 tonnes of steel. ²⁾

Three Gorges Dam in Hubei, China, is the largest and heaviest concrete structure, build using 28,000,000 m³ of concrete and 463,000 tonnes of steel. Its reservoir contains 39.3 km³ (9.43 cubic miles) of water, weighing more than 42,000,000,000 tonnes. ³⁾