FREE TRAINING FEATURE

FREE TRAINING FEATURE

Want to learn more about pavement management, in-place recycling, and pavement preservation? Do you feel like you're setup for failure as an agency engineer with little or no money to spend on your roads? Enter your email below to get free instant access to a two-hour video-training session that Blair did for the Northwest Pavement Management Association:

Better Roads Radio

Listen to Stitcher
LinkedIn

More Articles available on LinkedIn

Blair Barnhardt

Cold Planing

As defined by ARRA, Cold planing is the controlled cold milling of pavement to restore the surface to a specified profile.  Bumps, ruts, and other surface irregularities are removed, leaving a uniform textured surface.

Cold planing equipment is available to fit the requirements of almost all types of cold milling production, from smaller utility work to full lane applications.  Most of these machines are or can be equipped for self-loading.  All have proven their dependability, capability, and versatility.  With the development of carbide tip cutting tools for the range of milling operations, contractors have devised effective technological advances to make cold planing an economical option for road rehabilitation.

Among the benefits of cold planing are:

  • Improved pavement profiles and cross sections
  • Restored drainage flow and curb reveal
  • Textured surface for skid control and improved bonding
  • Minimum traffic interruption
  • Reclaimed material for future use
  • Lowered cost, extending the maintenance budget to provide more miles of pavement rehabilitation

Note that common terms related to this practice as it relates to hot mix paving are “shave and pave” and/or “mill and fill”.  In some instances owner agencies will specify deep patching in conjunction with a mill and inlay project that they are letting.  Quite often the contractor performing this work will utilize a 4′ or 7′ cold planing machine to excavate the existing road.  Typically the patches would be milled out to a 3″ or 4″ depth and 19mm (binder) would be used to inlay the patches.

It is worth nothing that the same Cold Planing machines can also be used for excavation purposes such as top soil or sub-base such as in an airport widening (see photos).  It is also common to see the cold mills used in conjunction with other asphalt reclamation disciplines such as Cold In-Place Recycling or Full Depth Reclamation projects.

Photos:

A typical intersection milling job

A typical intersection milling job

A commercial application for the cold milling

A commercial application for the cold milling

A sub-base excavation for runway widening

A sub-base excavation for runway widening

Cold Planing at a truck terminal prior in conjunction with an FDR project

Cold Planing at a truck terminal in conjunction with an FDR project