Infrastructure Development Code


  1. Where asphalt smoothing or overlay is required, the existing chip seal or asphalt surface shall be swept to remove all loose metal and debris before the application of the tack coat. Mix 5 shall be used to smooth irregularities up to a compacted depth of 20mm.
  2. Mix 10 shall be used for compacted depths of 20-35mm. Mix 15 for 35-50mm and mix 20 for greater than 50mm.