Blow holes in form faces of concrete

Blow holes in form faces of concrete

Cause

  • Air and water are trapped against formwork.
  • Inadequate compaction 
  • Unsuitable mix design
  • unsuitable release agent 

Prevention 

  • Improve vibration
  • change mix design
  • use the appropriate release agent
  • use absorbent formwork

Remedy

  • Fill with polymer modified fine mortar

4 thoughts on “Blow holes in form faces of concrete”

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