Usgunite.com Concrete Service Provider

USGunite.com has the ability to work on complex designs with multiple crews and equipment

working with your engineering teams to insure the quality of the project. You can view our work in Project section Swimming Pool Contractors, Gunite Pool Builders, Retaining Walls Design, Gunite Corporation

Concrete is a construction material composed of cement and other cementations materials such as fly ash and slag cement, aggregate (generally a coarse aggregate made of gravels or crushed rocks such as limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures.

Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete. A concrete mixture that does not have enough paste to fill all the voids between the aggregates will be difficult to place and will produce rough, honeycombed surfaces and porous concrete. A mixture with an excess of cement paste will be easy to place and will produce a smooth surface; however, the resulting concrete is likely to shrink more and be uneconomical.

A properly designed concrete mixture will possess the desired workability for the fresh concrete and the required durability and strength for the hardened concrete. Typically, a mix is about 10 to 15 percent cement, 60 to 75 percent aggregate and 15 to 20 percent water. Entrained air in many concrete mixes may also take up another 5 to 8 percent.

Basic forms of Concrete

Ready-mixed concrete: A hard building material made of sand and gravel, bonded together with cement. This type of concrete is manufactured in a factory or batching plant.

Precast concrete: Concrete that is poured and cast molded off site and erected as a building block on site. Concrete beams, columns, lintels etc which are manufactured and partly matured on site or in a factory before use.

Aerated concrete: A low density concrete made of portland cement, cement-silica, cement-pozzolan, lime-pozzolan, lime-silica paste or a combination of these materials. The concrete has a homogeneous cell structure, visible to the eye. Also called cellular concrete. Not to be confused with air-entrained concrete, in which air bubbles are microscopic in size.

Self-consolidating concrete: Also called self-compacting concrete. Concrete with a high workability that requires very little or no vibration or other mechanical means to consolidate the plastic concrete. This type of concrete is especially useful where it would be difficult or inadvisable to apply vibration, due to shape or location.

Roller-compacted concrete (RCC) is a special blend of concrete that has the same ingredients as conventional concrete but in different ratios. RCC is typically used for concrete pavement, but it is increasingly used to build concrete dams because the low cement content causes less heat to be generated while curing than do conventional massive concrete pours.

USgunite is a National wide company providing pneumatically applied concrete resources to pool contractors, commercial developers, engineering firms and government contractors. Check out USGunites Industrial Development Project in process. For more details visits: http://www.usgunite.com/prestigegunite/projects.aspx

by: Jim Kinnebrew

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