Suppliers of Conditioned Fly Ash

Conditioned Fly Ash can come in 2 forms:

  • Conditioned Fly Ash taken direct from silos at the power station where the Fly Ash is fed into mixers and “conditioned” with 15% to 25% water prior to delivery.
  • Lagoon Fly Ash, which has been slurried at the power station and pumped to lagoons. This material is excavated from the lagoons and allowed to stabilise to reduce its water content. If desired, it can also be screened prior to dispatch.

Conditioned Fly Ash is more easily handled in tipper trucks and the addition of water makes it more easy to compact. It is also a low density material so can be used as a fill material over weak or soft ground. When used in grouts for fill applications, it gives good yields whilst the continuing reaction between Fly Ash and the free lime from the cement means that it offers strength gains with time.

Conditioned ash is self-supporting, minimising the need for shoring. It has low permeability, assisting water run-off and it is a stable material - both chemically and physically. The spherical shape of the ash particles provides the additional benefits of a reduced water to solids ratio, reduced bleeding and good flow properties.

Typical uses include:

  • general or structural fill material
  • road bases for highway construction
  • capping material on landfill sites
  • waste stabilisation
  • aggregate/filler in cementitious grouts, or bituminous road materials
  • raw material feed in cement manufacture

Cementitious Solutions has access to Conditioned Fly Ash in many parts of the world – either through related companies or through its contracts with power stations.