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How to Make Reinforcement Bars Corrosion Resistant?

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Asked: October 16, 20172017-10-16T18:21:25-07:00 2017-10-16T18:21:25-07:00In: Construction Site Related
Gopal Mishra
Gopal Mishra

Gopal Mishra

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Gopal Mishra

How can the reinforcement bars be made corrosion resistant to be used for reinforced concrete construction?

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  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    2020-08-21T13:27:39-07:00Added an answer on August 21, 2020 at 1:27 pm

    Three methods are common to protect reinforcement from corrosion:

    1. The most common and most durable method is epoxy coating. This method is extensively used in highway construction, particularly in regions where salts are used for de-icing.
    2. Galvanized reinforcement is also available but is much less common, and far less durable.
    3. For low-risk applications, reinforcement is usually protected by maintaining adequate concrete cover. Small covers work well for interior dry uses while larger covers are required for concrete continuously in contact with (pH neutral and non-saline) water (eg groundwater).
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  2. nikeetasharma

    nikeetasharma

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    2020-09-08T23:08:31-07:00Added an answer on September 8, 2020 at 11:08 pm

    CORROSION refers to an electrochemical reaction between a metal and its environment. Steel will readily rust unless it is coated. Corrosion occurs when steel reacts with chloride ions (Cl-), CO2 in the presence of a toxic environment. Thus, corrosion is uneven erosion/pitting of metal surface due to intense rusting and is also harmful to the service performance of rebar.

    There are many ways of reducing the risk of corrosion-related distress in concrete. The first defencing layer is concrete, which should be thick and dense. Also, the cracks should be minimized. The concrete cover should be used appropriately.

    An additional measure for corrosion-resistant is that corrosion inhibiting admixtures should be used. Epoxy coatings should be done on rebar, which acts as a physical barrier and also isolates the steel from oxygen, moisture, and chloride ions (which are the three primary elements needed for corrosion to occur).

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  3. Gopal Mishra

    Gopal Mishra

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    Gopal Mishra
    2017-10-17T01:33:36-07:00Added an answer on October 17, 2017 at 1:33 am

    You can refer following articles regarding corrosion of reinforcement to find your answer:

    1. How to Control Corrosion of Steel Reinforcement in Concrete?
    2. Protection of Reinforcement Against Corrosion
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