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Trojan Grouts

Trojan general purpose grouts are blends of fly ash (Pulverised Fuel Ash) and Portland cement. Various blends are available, ranging from 1:1 PFA:PC (TGP1) to 20:1 PFA:PC (TGP20), depending on the properties required.


ScotAsh grouts are manufactured to comply with specifications such as the Civil Engineering Specification for the Water Industry, 5th Edition.

The fly ash used in the grouts complies with BS 3892: Part 3 (Latest Revision) Specification for Pulverised Fuel Ash for Use in Cementitious Grouts.

Uses and Benefits

The fly ash in Trojan General Purpose Grouts consists of hollow spheres of between one and 150 microns in size. These form a continuous grading that improves the rheological properties of the grout.

In addition, fly ash is a pozzolana and by reacting with the free lime released from the hydration of Portland cement it forms additional cemenitious hydrates, resulting in a denser, less permeable grout.

Some key advantages include:

  • Economical - increased volume
  • Reduced water to solids ration
  • Increasing compressive strength with time
  • Reduced bleeding
  • Increased yield
  • Reduced shrinkage
  • Reduced permeability
  • Increased resistance to sulfate attack
  • Improved flow properties

We also produce:

Fly Ash-Lime Grouts
Fly Ash-PC_Sand Grouts
Fly Ash-PC_Clay Grouts
Fy Ash-PC_Specialist Grouts (with admixtures)