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Concrete Construction - Essay Example

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Summary
In the paper “Concrete Construction” the author discusses the construction process, which starts with the preparation of the soil sub-layer, above which the plain cement concrete layer of required thickness is to be placed. The floor of the channel could also be made using reinforced cement concrete…
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Concrete Construction
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Extract of sample "Concrete Construction"

The machinery choice is also a very important component in the construction process. With a proper attachment for leveling and material lining activities the channel construction could be undertaken in a continuous mode (US patent, 1984). This would help to maintain the required slope and the roughness condition the important criteria that influence the velocity of flow. The concrete mix design shall be prepared as per the design specification and if the construction needs to be carried out in adverse condition addition of admixtures is necessary to facilitate the retention of properties of prepared concrete.

Finally, proper curing of the concrete works is also required to have the better durability of the construction process. FootbridgeThe footbridge construction requires more care as it is indented to carry moving loads with supports given only at the locations as specified in the design document. The major components of the footbridge, constructed over the diversion channel, are support piers at the ends and the bridge slab. The ends piers are the structures that transfer the load from the bridge to a hard ground capable of supporting the entire structure.

The foundation of piers is constructed in plain cement concrete and the pier wall in rubble masonry. The slab of the bridge is to be constructed in reinforced cement concrete. Prior to the concreting of the slabs proper formwork need to be in place as the design specification given by the structural engineer. After the completion of the formwork, the next task is to place the reinforcement. This size of the bars, the spacing between them, and providing the proper placement are the important factors to be considered in the reinforcement placing operation.

Following this is the concreting. The concrete mix preparation needs to be prepared as per the specification and shall start the process from one end of the bridge. The concrete is placed on the reinforcement need to be vibrated to achieve the maximum density without giving any chance for the formation of pores. And, the concrete prepared shall also conform to the quality specified in terms of w/c ratio, workability, etc. The machinery used would be the concrete mixings plants and conveyors that are a necessary concrete to the concreting location on the bridge.

Curing is the next important operation that needs to be undertaken after the concreting work. After the specified period of curing, the formwork shall be removed and finishing works shall be carried out to make the bridge fit to use.

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