2019 Highly Commended - Hawley Wharf, London

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Testing self compacting concrete: L-box test

The L-Box test to BS EN 12350-10 is used to assess the passing ability of self-compacting concrete to flow through tight obstructions without segregation or blocking.

  Two (59 1mm space) or three bar test 
   (41 1mm space)
  Fill hopper and strike surface
  Stand for 60 10sec
  Open gate and wait for movement to stop
  Passing ability ratio (PL) is depth at end of
   horizontal divided by depth vertical = H2/H1


L-Box test
L-Box test

Acknowledgement: Concrete Society