9. Use of ash in the manufacture of concrete

Fly ash can also be used as an aggregate in concrete and mortar, replacing cement. For this purpose, it must meet the quality requirements set out in standard NF EN 450 – October 1995 – (Classification P18-050) and its national annex – "Fly ash for concrete – Definition, requirements and quality control".

• Fly ash can be used in the composition of various types of concrete:

  • concretes manufactured on site ;

  • ready-to-use concrete ;

  • precast concrete ;

  • pavement concretes ;

  • self-placing concretes.

It is used at a rate of between 80 and 100 kg/m ³ of concrete. Thanks to their...