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HAUC
HAUC

Surface course mixtures

A2.3.5

All road types

  1. The coated surface course mixtures to PD 6691 must be AC10 close surf 100/150.
  2. AC10 close surf can be specified to have binder content (Bact) higher than those specified in PD 6691 Table B.14 and Table B.15 respectively to enhance workability during installation and improve in-service life. This binder content increase must be done by agreement where evidence of successful experience has been presented; including avoiding adverse impact on rutting and skid resistance.
A2.3.6

Footways, footpaths and cycle tracks

  1. The preferred coated surface course mixture is AC6 dense surf 100/150 complying with BS EN 13108-1. The binder content (Bact) can be specified to be higher than in PD 6691 Table B.15 to enhance workability during installation and improve in-service life.
  2. Where AC10 close surf incorporating 100/150 bitumen complying with BS EN 13108-1 is used to reinstate a carriageway and it extends to the footway (maximum total of 10 linear m or 4 m2 in the footway, footpath or cycle track for a continuous reinstatement), the same material can be used in the footway. The binder content (Bact) can be specified to be higher than in PD 6691 Table B.15 to enhance workability during installation and improve in-service life. Where the linear m or m2 of the reinstatement in footways, footpaths and cycle tracks exceed the values in this clause, then AC10 may only be used by agreement.
  3. The preferred mixture may be replaced by other agreed alternative materials where the existing surface is a coated mixture to the current PD 6691 of aggregate size finer than 6 mm nominal size.