Deterioration

ACRA Deterioration

The initiation and propagation of corrosion in concrete structures can be influenced by both internal and external factors. These sources of deterioration depend on concrete properties and exposure conditions and, to a large extent, govern structural performance and remediation practices.

Compilation of sources and causes of deterioration

SourcePotential causes of deterioration
Constituent materialsCement quality, water and aggregate, mechanical strength of aggregate, aggregate reactivity
Concrete propertiesWC, strength, permeability, thermal properties
Construction defectsInadequate curing, bleeding and segregation, honeycombing, poor construction joints, concrete cover to steel reinforcement
Natural & artificial agentsEnvironmental effects, weathering, bacterial growth, acid attack, freeze-thaw action, de-icing salts, underground water, acid attack, fire damage, etc.
LoadingWind, seismic, fatigue, vibration, abrasion, erosion, poor design

Refer to Chapter 2 of the Guide to Concrete Repair and Protection, whose content comprises:

  1. Internal factor
    – Alkali-silica (alkali-aggregate) reaction
    – Other reactions
  2. External factors
  3. Steel reinforcement corrosion
  4. Summary
  5. Acknowledgements
  6. Further reading
    – Standards

Find ACRA Members

Find A Member to Help with:

Setting the standards in the remedial industry since 1991.

Find ACRA Members

Find A Member to Help with: