Case 3 – Shrinkage Cracks
Navigation
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Maintenance and Diagnostics
- Regular inspections should be carried out methodically at regular intervals to detect the defects.
- Checklists could be used so that a thorough checking could be made. Defects could be recorded, monitored and not be left unattended.
- Cleaning of car parks should be carried out at appropriate intervals of time to ensure the removal of dirt before they stain the structure permanently:
- Daily spot cleaning to clear up oil spots on the drive way to prevent oil stains from becoming stubborn and difficult to clean off.
- The floor of the car park is scrubbed clean once a week
- The surface drains have to be flushed to clear silt and dirt twice a year to prevent blockages.
Diagnostics of Defect (see also NDT)
Cracks can be visually detected. However, following equipment may be used to analyze a crack.
Ultrasonic Pulse Velocity (UPV)
UPV can identify non-homogeneous conditions such as voids, cracks and honeycombs using the optional hand-held terminal. This method can also be used to estimate the depth of cracks.
