Concrete Technology

Various Kinds of Concrete in Construction Purpose

Various Kinds of Concrete in Construction Purpose following Concrete in Construction Purpose described below:

Normal concrete: Generally used concrete

Lightweight concrete: By adding coarse light aggregate (expanded clay aggregate), better insulating properties are achieved.Lower strength but also lower weight.

Aerated concrete: A kind of lightweight concrete. Instead of aggregate,aerated concrete contains air bubbles, which are produced through a chemical process and further improve the insulating qualities.

Heavy concrete: Particularly heavy aggregate (e.g. barite, iron ore, steel granulate etc.) with high dry unit weight, used above all for protection against radiation or similar.

Ultra high performance concrete (UHPC) : Uses furnace cement instead of Portland cement, very high strength and good durability, allows slender design, saves resources and can be used economically.

Water-impermeable concrete: Concrete with a high resistance to the entry of water,used above all to seal building parts in the ground (see Chapter Building parts, Footings/foundations)

Waterproof concrete: Similar to water-impermeable concrete, addition of barriers.

Self-compacting concrete : Addition of plasticiser, no additional compacting necessary, finely pored surface and complex geometries possible.

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Translucent concrete : Glass optical fibres are introduced into the fine concrete. Depending on their density and arrangement they create particular patterns and enable the concrete to become translucent.

Refractory concrete : Withstands temperatures from 500 to 2000 °C

Recycled concrete : Aggregate produced from recycled materials  (e.g. building rubble)

Concrete screed : Small aggregate size to allow thin layers to be made.Especially for making floor layers.

Prestressed concrete : Steel reinforcement is pre-spanned (pre-stretched),creating a high compressive stress. The properties of concrete are better exploited, more efficient building parts are produced. The stiffness prevents major deflection even with large spans.

Textile concrete : Composite material with low thickness and high resistance to compression and deflection. Flexible forms possible through particular reinforcing materials.

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Fibre concrete : Fibres can be made of plastic, glass fibre, carbon, natural fibres or similar.

Self-cleaning concrete : The surface is treated with photo catalytically effective metal oxides or sulphides. The self-cleansing, pollutant disintegrating effect is achieved by light. In addition, the surface must by super-hydrophobe (water repellent) or super-hydrophile (water-attractive).

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Exposed (fair-faced) concrete: Smooth, fine-pored surface, generally produced as a prefabricated part.

Tamped or compressed concrete : Unreinforced, historic method of use, produced layer by layer, compacted by tamping. High density, hardly any shrinking, few cracks.

Concrete Pouring

Ebook to Read Handbook on Concrete Mixes

Spun concrete : For tubes, piles or masts, compacted by a rapidly rotating steel formwork, low w/c value, very solid, dense concrete (up to C100/115). Hollow cross sections are created that can also be used to take service runs.

Sprayed concrete : Is particularly flowable and hardens quickly. Applied through a spray nozzle using pressurised air. This method allows concrete that is already compacted to be applied to a wide area.

Vacuum concrete : Introduction of the fresh concrete by means of a vacuum. At the same time superfluous water is suctioned off and a dense surface with few cracks is created.

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Various Type of Test on Fresh Concrete

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