Specified Granular Materials

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Roadstone Specified Granular materials are produced at our quarry locations by means of blasting, crushing and screening into the required sizes. Roadstone Specified Granular materials produced at our Pit locations are extracted from the pit face by excavator and screened into the required sizes.

Materials may vary in maximum size and percentage size distribution (grading) to suit the required applications and comply with the relevant specification. When producing these materials the aim is to always to have a finished product which is clean, hard and durable and capable of performing as required in an engineering environment and in accordance with specification..

These products have a wide range of required physical and chemical specification requirements depending on the end-use application. The main specifier of these products in Ireland is the Transport Infrastructure Ireland whom sets out each materials requirement in their Specification for Road Work Series 500,600 &800. Series 500 deals with Drainage and Pipe bedding materials, Series 600 with Earthworks materials and Series 800 with Sub-base materials.

Granular Fill material for use under concrete floors and footpaths is specified under Annex E of S.R. 21, which lists the physical, chemical and petrographic requirements of the material. This specification is aimed specifically at granular fill for use under concrete.

Production is managed under our ISO 9001 Quality Management scheme with all locations having either System 2+ or 4 levels of attestation of conformity as appropriate.

  • Granular Fill Under Concrete Floor
  • Loading Roadstone Aggregate

Key features and benefits

  • Strong and durable to meet the demands of the civil engineering environment.
  • Available in a range of sizes and gradings
  • Made from local materials manufactured to the highest standards
  • Large volumes can be accommodated

Technical specification


  • EN 13242 Aggregates for Unbound and Hydraulically¬† Bound Materials (S.R. 21)
  • EN 13285 Unbound Mixtures Specification
  • NRA Specification for Road Works

Frequently Asked Questions on S.R. 21 

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