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Mix proportion of Antifreeze Concrete Admixture

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Asked: January 20, 20192019-01-20T16:15:12-08:00 2019-01-20T16:15:12-08:00In: Construction
Muzamil
Muzamil

Muzamil

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What should be the mix proportions of antifreeze concrete admixture during freezing conditions and also suitable antifreeze to be used.

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  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    2020-09-16T16:09:57-07:00Added an answer on September 16, 2020 at 4:09 pm
    Mix proportion of Antifreeze Concrete Admixture

    Mix proportion of admixture in antifreeze concrete :

    • Admixture used in antifreeze concrete: sodium nitrate  and sodium sulphate
    • Mix proportion Ratio of sodium nitrate to sodium sulphate is 3:1
    • Weight of admixture– 2% to 8% of the total weight of the mix

    More information :

    Any type of antifreeze product prevents the water against freezing before or during the hydration process of cement.


    Thank You.

     

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  2. aviratdhodare

    aviratdhodare

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    aviratdhodare
    2020-09-18T18:36:46-07:00Added an answer on September 18, 2020 at 6:36 pm

    The problem is not preventing concrete from freezing. The problem is concrete quits hardening when the temperature drops below 50 degees F. Concrete produces heat with the heat of hydration and will aid in the hardening process. Cold weather concreting methods should be used and consist of insulating the concrete and/or providing heaters. Monitoring the temperature with thermometers is required.

    Some people add calcium chloride to increase the heat of hydration. Calcium chlodride can cause some reinforcing steel to crorrode.

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  3. Madeh Izat Hamakareem

    Madeh Izat Hamakareem

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    Madeh Izat Hamakareem
    2019-01-26T14:53:22-08:00Added an answer on January 26, 2019 at 2:53 pm

    The mixing ratio of the concrete or the mortar, and the amount of the admixture to be used must be defined with the laboratory trials, using the raw materials taken from the construction site, depending on the required concrete class and the quality, and ambient temperature, Table below provide a percentage of the weight of the dry concrete mixture.

    Regarding types of antifreeze admixture, please visit the following link:

    https://theconstructor.org/concrete/antifreeze-admixtures-concrete/20416/

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  4. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    2020-11-28T12:39:11-08:00Added an answer on November 28, 2020 at 12:39 pm

    An antifreeze admixture consisting of sodium nitrate and sodium sulfate in a ratio of sodium nitrate to sodium sulphate of 3:1 and wherein the admixture is present in the amount of from 2% to 8% , by weight of mixture.

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