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What are the Main causes of Concrete Deterioration?

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Asked: July 2, 20202020-07-02T18:46:30-07:00 2020-07-02T18:46:30-07:00In: Concrete
Mangala Karunarathne
Mangala Karunarathne

Mangala Karunarathne

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Mangala Karunarathne Beginner

What are the Main causes of Concrete Deterioration?

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  1. Neenu S K

    Neenu S K

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    Neenu S K
    2020-07-03T23:22:41-07:00Added an answer on July 3, 2020 at 11:22 pm

    Main Causes of Concrete Deterioration Are:

    1. Corrosion of Rebars or Other Embedded Metals

    • Exposure of R.C concrete to chloride ions
    • Exposure to Acidic Environment
    • Exposure to Carbonation
    • Contact between two dissimilar Metals within concrete

    2. Freezing and Thawing

    • Expansion of Aggregates
    • Scaling of concrete due to deicer chemicals used for snow and ice removals.

    3. Chemical Attack

    • Exposure to Acid Attack
    • Exposure to Salts and Alkalis
    • Exposure to Sulphates

    4. Alkali-Aggregate Action

    • Alkali-Silica Reaction (ASR)
    • Alkali-Carbonate Reaction (ACR)

    5. Abrasion or Erosion of Concrete Surfaces

    • Abrasion of concrete pavements and floors
    • Abrasion of hydraulic structures due to effects of silt, gravel, rock, ice etc movement.

    6. Fire and Heat Action

    7. Volume Changes

    • Plastic Shrinkage Cracks
    • Drying Shrinkage Cracks
    • Thermal Cracks
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  2. Preet Chovatiya

    Preet Chovatiya

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    Preet Chovatiya Learner
    2020-07-03T22:51:41-07:00Added an answer on July 3, 2020 at 10:51 pm

    The main causes of concrete deterioration are as below:

    1. Alkali Aggregate reaction in concrete
    2. Corrosion of embedded steel
    3. Fire or Heat
    4. Abrasion/Erosion
    5. Chemical Attack
    6. Overload and Impact on concrete
    7. Surface defects
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  3. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    2020-12-18T20:22:57-08:00Added an answer on December 18, 2020 at 8:22 pm

    Corrosion of reinforcing steel and other embedded metals is the leading cause of deterioration of concrete. When steel corrodes, the resulting rust occupies a greater volume than the steel. This expansion creates tensile stresses in the concrete, which can eventually cause cracking, delamination, and spalling.

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  4. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    2020-12-21T12:46:41-08:00Added an answer on December 21, 2020 at 12:46 pm

    Concrete degradation may have various causes and reasons. It can be damaged by factors like fire, alkali – aggregate reaction expansion, sea water effects, bacterial corrosion, calcium leaching, physical and chemical damage from carbonation, corrosion of reinforcements and many others.

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