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The durability of concrete - Essay Example

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Undergraduate
Author : bhoeger
Essay
Engineering and Construction
Pages 12 (3012 words)

Summary

This research is being carried out to evaluate and present the Durability of concrete. Concrete durability has been defined by the American Concrete Institute as “its resistance to weathering action, chemical attack, abrasion and other degradation processes”…

Extract of sample
The durability of concrete

This research will begin with the definition of concrete, as a construction material. Concrete is a basic construction material, it is made of mainly four constituents, cement, fine aggregate(sand), coarse aggregate and water. With the addition of water to the cement and other components in dry form, this addition of water makes the concrete fluid and this flow able mixture enables us to pore in the desired shape and size which is dictated by the moulds and formwork. During this the water chemically bonds with the cement and hydration takes place. The ultimate strength of concrete is a factor of water cement ratio and this is the reason a precise mix ratio of concrete is calculated and mix design is prepared. Finally the dry components are combined to form hardened matrix. This final product, the concrete is good in compressive strength but weak in tensile strength. To finish this weakness we provide steel reinforcement which has high tensile strength. This concrete is called the reinforced concrete. The concrete’s quality is determined by the quality and care taken while the production phase of the concrete. As we are well aware of the fact that elasticity of concrete is all most the same at low stress levels but tends to decrease as the higher stress levels are attained as matrix cracking develops. At the very same time the concrete is very weak in thermal expansion and has a low value of coefficient of thermal expansion. The content of cementitious material, along with the water content determine the final strength, durability, abrasion resistance, shrinkage values and many other properties. ...
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