👉Deep segregation in concrete, especially in vertical elements (columns, walls, etc.), is a serious defect that compromises the strength, durability, and sometimes even the stability of the structure, particularly in harsh climates.
🏷Here are the most commonly used repair methods that comply with DTU (Unified Technical Document) requirements:
🚧1. Mortar repair (manual) using monotop products, generally used for localized and accessible surface segregation.
📌Application steps
✅ Demolition of the defective concrete down to sound concrete.
✅ Cleaning and passivation of the reinforcing steel.
✅ Application of a bonding agent.
✅ Reshaping with a thixotropic repair mortar (monotop).
✅ Wet curing for 48 to 72 hours to prevent cracking.
⏺Advantages: Simple, quick, ideal for small areas.
🚧2. Repair by grouting or grout injection (non-shrinking fluid mortar): This method is recommended for deep segregation with significant voids around the reinforcing steel.
📌Application steps
✅ Watertight formwork around the area.
✅ Cleaning and dampening the substrate.
✅ Pouring or injecting high-strength fluid grout.
✅ Checking the filling and wet curing.
✅ Advantages: Excellent penetration, high strength, fills cavities.
⏺Product application requires proper formwork and technical expertise.
🚧3. Structural repair (shotcrete or lining): In cases of widespread segregation or significant loss of cross-section.
📌Application steps
✅ Complete demolition of the damaged area.
✅ Cleaning, passivation of the reinforcing steel, and possibly the addition of reinforcement.
✅ Application of shotcrete or reinforced concrete/composite (FRP) lining.
✅ Finishing and curing.
🔗Advantages: Restores or increases structural strength.
🔗However, the method is expensive and requires rigorous engineering and control.
📌To avoid any form of segregation, it is essential to.
🔻 Before proceeding with the application, it is important to check the workability of the concrete.
🔻 Maintain vibration of the concrete throughout the pouring process.
🔻 Verify the conformity of the concrete, the maximum aggregate density (Dmax) specified in the mix design, and adhere to it.
@etconp
🏷Here are the most commonly used repair methods that comply with DTU (Unified Technical Document) requirements:
🚧1. Mortar repair (manual) using monotop products, generally used for localized and accessible surface segregation.
📌Application steps
✅ Demolition of the defective concrete down to sound concrete.
✅ Cleaning and passivation of the reinforcing steel.
✅ Application of a bonding agent.
✅ Reshaping with a thixotropic repair mortar (monotop).
✅ Wet curing for 48 to 72 hours to prevent cracking.
⏺Advantages: Simple, quick, ideal for small areas.
🚧2. Repair by grouting or grout injection (non-shrinking fluid mortar): This method is recommended for deep segregation with significant voids around the reinforcing steel.
📌Application steps
✅ Watertight formwork around the area.
✅ Cleaning and dampening the substrate.
✅ Pouring or injecting high-strength fluid grout.
✅ Checking the filling and wet curing.
✅ Advantages: Excellent penetration, high strength, fills cavities.
⏺Product application requires proper formwork and technical expertise.
🚧3. Structural repair (shotcrete or lining): In cases of widespread segregation or significant loss of cross-section.
📌Application steps
✅ Complete demolition of the damaged area.
✅ Cleaning, passivation of the reinforcing steel, and possibly the addition of reinforcement.
✅ Application of shotcrete or reinforced concrete/composite (FRP) lining.
✅ Finishing and curing.
🔗Advantages: Restores or increases structural strength.
🔗However, the method is expensive and requires rigorous engineering and control.
📌To avoid any form of segregation, it is essential to.
🔻 Before proceeding with the application, it is important to check the workability of the concrete.
🔻 Maintain vibration of the concrete throughout the pouring process.
🔻 Verify the conformity of the concrete, the maximum aggregate density (Dmax) specified in the mix design, and adhere to it.
@etconp
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