CONCRETE
Concrete is a construction material that consists of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel limestone or granite, plus a fine aggregate such as sand or manufactured sand and water) and chemical admixtures.
Concrete solidifies and hardens after mixing and placement due to a chemical process known as hydration.The water reacts with the cement, which bonds the other components together, eventually creating a stone-like material. It is used to make pavements, architectural structures, foundations, motorways/roads, overpasses, parking structures, brick/block walls and footings for gates, fences and poles.
COMPOSITION
The composition of concrete is determined initially during mixing and finally during placing of fresh concrete. The type of structure being built as well as the method of construction determine how the concrete is placed and therefore the composition of the concrete mix (the mix design).
TYPES OF CONCRETE
Regular concrete
High-strength concrete
High-performance concrete
Self-compacting concretes
Shotcrete
Pervious concrete
Cellular concrete
Cork-cement composites
Roller-compacted concrete
Glass concrete
Asphalt concrete
Rapid strength concrete
Rubberized concrete
Polymer Concrete
HISTORY
In Serbia, remains of a hut dating from 5600 BC have been found, with a floor made of red lime, sand, and gravel. The pyramids of Shaanxi in China, built thousands of years ago, contain a mixture of lime and volcanic ash or clay.
ROBERT ANDRIOAIA - 3 D
Concrete is a construction material that consists of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel limestone or granite, plus a fine aggregate such as sand or manufactured sand and water) and chemical admixtures.
Concrete solidifies and hardens after mixing and placement due to a chemical process known as hydration.The water reacts with the cement, which bonds the other components together, eventually creating a stone-like material. It is used to make pavements, architectural structures, foundations, motorways/roads, overpasses, parking structures, brick/block walls and footings for gates, fences and poles.
COMPOSITION
The composition of concrete is determined initially during mixing and finally during placing of fresh concrete. The type of structure being built as well as the method of construction determine how the concrete is placed and therefore the composition of the concrete mix (the mix design).
TYPES OF CONCRETE
Regular concrete
High-strength concrete
High-performance concrete
Self-compacting concretes
Shotcrete
Pervious concrete
Cellular concrete
Cork-cement composites
Roller-compacted concrete
Glass concrete
Asphalt concrete
Rapid strength concrete
Rubberized concrete
Polymer Concrete
HISTORY
In Serbia, remains of a hut dating from 5600 BC have been found, with a floor made of red lime, sand, and gravel. The pyramids of Shaanxi in China, built thousands of years ago, contain a mixture of lime and volcanic ash or clay.
ROBERT ANDRIOAIA - 3 D
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