Publication of S.R. 21 (revised)
5th June

S.R. 21:2014 was developed by the Aggregates Panel of NSAI's Roads Standards Committee.

I.S. EN 13242:2002 +A1:2007 specifies the properties of aggregates for use in unbound and hydraulically bound materials.  S.R. 21:2014 is a complete revision of S.R. 21:2004+A1:2007 and provides advice on the use of I.S. EN 13242:2002+A1:2007 in Ireland where guidance is deemed necessary.

Annexes A, B, C, D and F of this S.R. provide guidance for the specification of aggregate properties for various end uses, within the ranges permitted in I.S. EN 13242:2002+A1:2007 and equivalent to those currently specified in Ireland, by reference to the relevant National Roads Authority (NRA) Specification for Road Works.

Annex E has been revised in line with the recommendations of the Report of the Pyrite Panel 2012 and the knowledge and experience gained, since 2007, on pyrite. Annex E gives recommendations for specifying material properties and recommendations for procedures for production of unbound granular fill (commonly known as hardcore) for use under concrete floors and footpaths.
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