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Is Salt Harmful To Concrete

Discussion in 'Ice Management' started by Matson Snow, Mar 3, 2012.

  1. Matson Snow

    Matson Snow PlowSite.com Addict
    Messages: 1,985

    As the Title says......Is salt Harmful to Concrete ....Explain Why??....:salute:
     
  2. newhere

    newhere PlowSite.com Addict
    from Fenton
    Messages: 1,288

    to my understanding its the repeated freeze thaw cycles that makes the concrete flake off. It makes the water freeze in it and fracture the concrete.
     
  3. Matson Snow

    Matson Snow PlowSite.com Addict
    Messages: 1,985




    True to a Point........But, Spalling is also caused by Low air in the Mix, or Over finishing by the Contractor...
     
  4. Mike NY

    Mike NY Senior Member
    from zone 5
    Messages: 103

  5. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Somebody is bored....
     
  6. Mdwstsnow512

    Mdwstsnow512 Senior Member
    Messages: 168

    i have a concrete pad with salt stored on it for the last 4 years.

    beat it with equip. buckets every storm.

    looks a little worn, but the surface hasnt spalled at all.

    its a combination of things, as Matson said...but the freeze/thaw cycle created by salt is why salt generally gets a bad rap

    if it never gets water and freezes..it
     
  7. snocrete

    snocrete Banned
    Messages: 2,862

    How many times do we have to tell you..................................................................................................................................ONLY IF ITS HUNGRY
     
  8. Precedence

    Precedence Senior Member
    Messages: 110

    The short answer is no. Salt on it's own does not react with concrete.

    The long answer can be read here: http://www.tac-atc.ca/english/resourcecentre/readingroom/pdf/roadsalt-5.pdf

    The typical salt-related damage to flexible and rigid pavements listed below is described in further detail in the above article:

    - Salt can accelerate damage to some poorly-designed or constructed hot-mix asphalt pavements.

    - Salt can cause scaling of poor-quality concrete pavements and concrete pavers.

    - Salt can cause spalling of steel reinforced concrete by accelerating steel corrosion if cracks allow chloride ions access to the reinforcing steel.

    - The brine resulting from road salt use can damage some thin, cracked or poorly drained flexible pavements by causing differential frost heaving at the pavement edge or at unsealed cracks.

    - The magnesium in magnesium chloride may react with the cement paste in concrete, weakening the pavement structure.