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Use aerated concrete anchors for fasteners: System D DIY Tips.

Fasteners: dowels for aerated concrete

Pre-pierce to the required diameter, and hammer the dowel.
The helical fins fit in this soft material and support a vertical load up to 90 kg.

Hit several small hammers.
The screw can then screw and unscrew without difficulty.

Fasteners: dowels for aerated concrete: concrete

Video Instruction: Dewalt Gasbeton aerated concrete fixing