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Fly Ash: Geotechnical Applications

Fly ash is an extremely fine powder consisting of spherical particles less than 50 microns in size. Fly ash is one of the construction industry's most commonly used pozzolans. Pozzolans are siliceous or siliceous/alumino materials possessing the ability to form cementitious compounds when mixed with lime (calcium hydroxide, or Ca(OH)2) and water.

 

Self-cementing fly ash is a hydraulic cementitious material possessing pozzolanic properties and a high calcium oxide content, which allows it to set and harden through chemical interaction with water. The chemical reaction that occurs during the hydration process of self-cementing fly ash is similar to the reaction that takes place during the hydration process of portland cement.

 

Applications for self-cementing fly ash include

  • Mitigation of shrink/swell properties in expansive clay soils;
  • Hot mix asphalt (HMA) pavement recycling;
  • Structural fill;
  • Stabilization of aggregate bases;
  • Soil stabilization; and
  • Soil drying.

 

Product claims are based on proper use in accordance with recognized industry standards. Please contact your Lafarge Cement representative for specific product information, availability, and ordering.

Related Downloads

Completion of blending of fly ash and pulverized existing pa

Related Projects

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Full Depth Reclamation Using Self Cementing Fly Ash

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LafargeHolcim. Cement, aggregates, Concrete.