How to perform in situ test as per ASTM F2170

Perform 3 per 100m2 (1000ft2) and 1 per next 100m2. Holes must be drilled dry and perpendicular (90˚), do not use water for cooling or lubrication.

When drying is from the top only, it is recommended that the hole should be drilled to approx 40% of the slab thickness.

When drying is from both sides, it is recommended that the slab should be drilled to approx 20% of slab thickness.

A hole cleaning brush is often required to ensure the drilled hole is free from any loose particles. A vacuum should also be used to ensure the drilled hole is free from any dust.

The user should always refer to national standard guidelines for definitive and current procedure and specifications.