🕑 Reading time: 1 minuteDifferent types of defects in concrete structures can be cracking, crazing, blistering, delamination, dusting, curling, efflorescence, scaling and spalling. These defects can be due to various reasons or causes.
- Causes for Defects in Concrete Structures
- Types of Concrete Defects - Causes, Prevention
Causes for Defects in Concrete StructuresCauses of defects in concrete structures can be broadly categorized as:
- Structural deficiency resulting from errors in design, loading criteria, unexpected overloading, etc.
- Structural deficiency due to construction defects.
- Damage due to fire, floods, earthquakes, cyclones etc.
- Damage due to chemical attack.
- Damage due to marine environments.
- Damage due to abrasion of granular materials.
- Movement of concrete due to physical characteristics.
Structural Defects due to Design and DetailingIn such case, the design is required to be reviewed in detail and remedial measures worked out by the design team. Once this is done the methods of carrying out the remedial measures will be similar to those arising out of other defects.
Structural Deficiency due to Construction DefectsDefective construction methods form the largest segment of source of distress to the beams. Such defects can be broadly subdivided as follows:
- Defects due to the quality of raw materials.
- Non adoption of designed concrete mix.
- Use of defective construction plant for producing, transporting, and placing the concrete.
- Defective workmanship.
- Inadequate quality detailing.
Other factors leading to poor design detailings
- Re-entrant corners.
- Abrupt changes in section.
- Inadequate joint detailing.
- Deflection limits.
- Poorly detailed drips and scuppers.
- Inadequate or improper drainage.
- Poor detailing of expansion joints.