Srps En 13670 Info

Technical Guide: Preparation of Concrete Surfaces

Standard Reference: SRPS EN 13670 (Execution of concrete structures)

The standard specifies when formwork can be struck (removed) based on concrete strength development, typically requiring a minimum percentage of design strength. srps en 13670

• Self-Checking: The contractor must check their own work.
• Inspection: An independent inspector (or the client’s representative) must verify compliance.
• Documentation: All checks (rebar placement, concrete delivery tickets, test results) must be recorded. If it isn't documented, it didn't happen.

| Aspect | BAB 87 (Old) | SRPS EN 13670 (New) | | :--- | :--- | :--- | | Approach | Prescriptive (recipe) | Performance-based (outcome) | | Curing | Fixed durations | Based on strength gain | | Tolerances | Single values | Class-based (depending on function) | | Quality control | Periodic testing | Continuous documented quality plan | Self-Checking: The contractor must check their own work

• Stability and strength: Formwork must withstand fresh concrete pressure without excessive deflection.
• Surface finish: Specifies classes (e.g., K1, K2, K3) for surface regularity based on the intended use (exposed architectural concrete vs. hidden industrial floors).
• Removal times: The standard provides tables for minimum stripping times based on concrete strength gain and temperature.

1. Purpose and Application

The primary purpose of this standard is to ensure that the finished structure meets the design requirements regarding safety, serviceability, and durability. | Aspect | BAB 87 (Old) | SRPS