Specification of surfacing aggregate PSV (minimum) for use on the ‘Minor’ road network - DEM 168/22

Date published: 11 May 2022

Memorandum assisting the Designer in specifying surface course materials through prescribing minimum values of Polished Stone Value (PSV) for the coarse aggregate and chippings in surfacing mixes for use on Northern Ireland’s ‘minor’ road network. 

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