Concrete repair mortar on a bridge structure

Reinforced concrete bridges are designed to maintain their service and function over long periods of time. During this service life, the concrete is subjected to many aggressive influences, including variable loading and vibration, extreme weather conditions, the presence of chlorides in de-icing salts and cycles of freeze and thaw, plus air borne chlorides in marine environments.

The repair and protection of reinforced concrete bridges must always be executed according to all relevant local Standards and Regulations. After a detailed condition survey and root cause analysis, the right procedures for successful refurbishment can be defined. Standards (such as European Standard EN 1504-9) define Principles and Methods to be refurbish damaged concrete. Please refer to our Brochure ‘The Repair and Protection of Reinforced Concrete with Sika’ for more information relating to repair and protection according to EN 1504-9.

Types of Damage Obtained By Reinforced Concrete Bridges

Concrete Spalling on bridges
Image: Concrete Spalling

Root Cause Examples

  • Steel Reinforcement Corrosion
  • Freeze/Thaw Action
  • Impact
Non Structural Cracks on bridges
Image: Non Structural Cracks

Root Cause Examples

  • Shrinkage
  • Thermal Movement
  • Alkali Aggregate Reaction (AAR)
Steel Reinforcement Corrosion on bridges
Image: Steel Reinforcement Corrosion

Root Cause Examples

  • Chloride Ingress
  • Carbonated Concrete
  • Stray Electrical Current
Leaching/ Efflorescence on bridges
Image: Leaching/ Efflorescence

Root Cause Examples

  • Water Ingress
     
Structural Cracks on bridges
Image: Structural Cracks

Root Cause Examples

  • Overloading
  • Structural Movement/Vibration
  • Earthquake Impact
Structural Steel Corrosion on bridges
Image: Structural Steel Corrosion

Root Cause Examples

  • Inadequate Steel Coatings
  • Chloride Ingress
  • Water Ingress