Bs En — 12390-2:2019

Treated with a non-reactive release agent for easy demolding. 2. Filling and Compaction

The top surface must be finished flat to ensure even loading during testing. 3. Initial Curing and Demolding Timeframe: Specimens typically remain in the mold for Environment: They must be kept at a temperature of 15∘C15 raised to the composed with power C 22∘C22 raised to the composed with power C 20∘C20 raised to the composed with power C

Specimens must be cast in molds that comply with . Molds should be: Non-reactive: Materials must not affect the concrete. bs en 12390-2:2019

Using a vibrating table or internal "poker" vibrator. Hand Compaction: Using a standard tamping rod or bar.

To prevent loss of cement paste or water during casting. Treated with a non-reactive release agent for easy demolding

The concrete must be filled in layers to ensure full density without segregation. Acceptable compaction methods include:

Careful removal is required to avoid edge damage, which can weaken the specimen during a compression test. 4. Final Curing Conditions Using a vibrating table or internal "poker" vibrator

The main goal of BS EN 12390-2:2019 is to eliminate variables in the preparation process. If specimens are made or cured incorrectly, the resulting strength data may be falsely low, leading to unnecessary project delays or costly structural disputes. Key functions include:

) and protected from moisture loss by covering them with plastic or wet burlap.

Once demolded, specimens must be cured until the time of testing. Standard methods include: