Srps En 13670 [cracked]

Guide to SRPS EN 13670: Execution of Concrete Structures

• Acceptance of fresh concrete: Testing for slump (SRPS EN 12350-2) and air content.
• Placing: Maximum free fall height (typically 1.5 meters to prevent segregation).
• Compaction: Internal vibrators must be used systematically; the standard prohibits over-vibration (which causes bleeding) and under-vibration (honeycombing).
• Curing: The most neglected part. The standard mandates that curing must begin immediately after finishing and last until the concrete achieves 50% of its design strength (typically 3–7 days depending on conditions). Methods include water spraying, covering with wet hessian, or curing compounds.

Execution Classes

: The standard uses "Execution Classes" (1, 2, or 3) to scale the level of inspection and control based on the complexity and importance of the structure.

Reinforcement and Prestressing

Requirements for the design and construction of molds (formwork) and their supports (falsework). It ensures they are stiff enough to hold the weight of wet concrete and achieve the required surface finish. srps en 13670