Concrete

What is concrete? 

  Concrete is a building material that consisted of hard,chemically inert substance which known as aggregate (different type of sand and gravel) bonded together with cement, commonly Portland cement and water.The cement, which act as the binder are mixed with the aggregate and later on water is added to this dry composite  then solidified through a chemical process called hydration.   

                    

Concrete

                                                                          

Click the link below to watch how concretes are made!

    Concrete is widely used for making architectural structures, foundations, brick/block walls, pavements, bridges/overpasses, motorways/roads, runways, parking structures, dams, pools/reservoirs, pipes, footings for gates, fences and poles and even boats. Famous concrete structures include the Burj Khalifa (world's tallest building), the Hoover Dam, the Panama Canal and the Roman Pantheon.

     Concrete technology was known by the Ancient Romans and was widely used within the Roman Empire. After the Empire passed, use of concrete became scarce until the technology was re-pioneered in the mid-18th century.

      The environmental impact of concrete is a complex mixture of not entirely negative effects; while concrete is a major contributor to greenhouse gas emissions, recycling of concrete is increasingly common in structures that have reached the end of their life. Structures made of concrete can have a long service life. As concrete has a high thermal mass and very low permeability, it can make for energy efficient housing.