Bs En 12390-2:2019 //top\\ < 1080p >

The standard is rigorous in its details. Deviations from these specifications can render a test result invalid.

A central innovation in the 2019 revision is the heightened emphasis on proper compaction. The standard prescribes two methods: internal vibration (using a needle vibrator) or hand layering (using a tamping bar). For each method, specific rules apply—for example, when using a vibrator, the number of insertion points and the duration are defined to avoid segregation or entrapment of air. The 2019 edition clarifies the depth of vibrator penetration and the need to avoid over-vibration, which can cause aggregate settlement and weaken the top surface. bs en 12390-2:2019