Bs En 12390-2:2019 Online

of hardened concrete. It is a critical component of the EN 12390 series, which governs the testing of hardened concrete to ensure structural integrity and compliance with design specifications. 1. Scope and Application

C. They must be protected from shock, vibration, and moisture loss (e.g., covered with polyethylene sheeting). Final Curing

The water temperature must be maintained at 20°C ± 2°C. bs en 12390-2:2019

Molds must be clean, watertight, and treated with a releasing agent that does not react with the cement.

: Specimens are typically cast in steel or rigid moulds that meet specific dimensional tolerances. Filling and Compaction of hardened concrete

A thin film of non-reactive mould oil or release agent must be applied to the inner surfaces of the mould to prevent the concrete from sticking, without causing surface chemical damage. Step-by-Step Procedure for Making Specimens Step 1: Sampling and Preparation

: Sets strict parameters for curing, typically requiring specimens to remain in their molds for at least 16 to 24 hours before being transferred to a water tank or mist room at a controlled temperature of Scope and Application C

Curing is arguably the most critical phase, as it directly impacts the hydration process and ultimate strength development. BS EN 12390.2 - 2000 (Testing Hardened Concrete - Scribd

: The standard allows for multiple methods but warns against over-vibration, which can cause the loss of entrained air and lead to segregation. For hand compaction, it typically suggests 25 strokes per layer to remove entrapped air without disturbing entrained air. Initial Curing

The 2019 version replaced the older 2009 standard, introducing more refined guidelines to ensure the reliability of compressive and tensile strength results. Adhering to this standard ensures that test results are reproducible and reflect the true strength of the concrete used in the structure. Covers sampling fresh concrete. Outlines mould preparation. Defines casting techniques.

Before placing any concrete, clean the molds thoroughly. Apply a thin, even coat of mold release agent to the inner surfaces. Ensure all bolts and clamps are tightened to prevent grout loss during compaction. 2. Sampling and Mixing