Case 3
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Remedial (see also Remedial)
The following methods can be used to repair the crack:
Repair of structural crack lines (Procedure of Surface Repair)
Surface repairs can be done on the floor slab if there are no signs of water seepage from underneath or widening of gap with time.
Patching (Procedure of Patching)
The patching method is the most common repair method for minor concrete defects such as surface spalls.
This method is used to rehabilitate corrosion-damaged infrastructure. However, when the chloride content in the concrete in contact with the rebars equals or exceeds the corrosion threshold, membranes will have no significant impact on reducing the corrosion.
Two types of materials are commonly used for patching:
- Cementitious mortars such as cement mortar and polyester-modified cementitious mortar.
Resin-based mortars such as epoxy resin mortar and polyester resin mortar.
The most crucial step for a successful patching is surface preparation.
Concrete Repair Application – courtesy of Sika