Tuesday, February 17, 2009

COLD IN-PLACE RECYCLING

This innovative road reconstruction process is a cost-effective alternative to more traditional methods of rebuilding asphalt roadways. It is used when existing pavement has aged, cracked or deteriorated beyond the point that normal road maintenance operations are practical or cost effective.

With single-unit Cold In-Place Recycling Train, a highly-efficient milling machine excavates the existing asphalt pavement to a depth of 75mm - 300mm to eliminate cracks, ruts and oxidized asphalt. The down-cutting action of this specially-designed milling machine sizes the asphalt and immediately blends it with a specially-formulated asphalt emulsion. This emulsion mixes with the milled pavement and acts as a binder to form the new recycled asphalt pavement. Finally, this new mixture is placed on the roadway by a bituminous paver and compacted as a new and more durable 75mm - 300mm asphalt base course. This new base course is placed at the grade and cross-slope as required by project specifications.

Major road detours and obstructions normally associated with road reconstruction are eliminated with the Cold In-Place Recycling Process. This entire reconstruction takes place in a single lane at a time, allowing traffic to flow unimpeded around the recycling operation. Access into and out of driveways can be provided during construction so deliveries and businesses are minimally interrupted. Another positive aspect of this process is that all of the construction is conducted within a span of approximately 30 to 40m. This relatively small work area can greatly reduce the delay time motorists generally experience in conventional construction work zones.
Following a brief curing period of approximately one week, a surface course of new hot mix asphalt 40mm to 60mm in depth is applied on top of the recycled base to complete the road reconstruction process. The thickness of the new surface mix placed over the recycled base will depend upon the use and traffic loading of the area being reconstructed.

Cold In-Place Recycling has been used since the early 1980's to reconstruct nearly every type of asphalt-based roadway. These projects include "farm-to-market" roads that were constructed without a proper asphalt base, busy residential roads, urban commuter thoroughfares, and major feeder systems for industrial parks. Some roads completed with this process now handle in excess of 15,000 to 20,000 vehicles per day.

Cold In-Place Recycling can be used to rehabilitate all types of asphalt pavement including airport taxiways/runways and parking lots for heavy industrial, commercial and institutional uses.

THE BENEFITS OF COLD IN-PLACE RECYCLING INCLUDE;


ENVIRONMENTALLY SUPERIOR CONSTRUCTION
  • No Asphalt is Wasted - 100% is efficiently reused
  • Natural resources are preserved
  • Landfill space is not taken up by a recyclable resource

MINIMAL USER IMPACT
  • Faster reconstruction
  • Road that could have taken weeks to rebuild can be recycled in just a few days or less.
  • Less commuter delay
  • In most cases, the recycled road remains open to traffic throughout the reconstruction. Residents are minimally affected
  • Businesses remain open and deliveries can be maintained
  • Emergency services and bus transportation continue with minimal delay

LOWER COST
  • A typical Cold In-Place Recycling project is one-half to one-third the cost of traditional total reconstruction methods
  • In US, Cold In-Place Recycling saves taxpayers over $300 million each year.

STRONGER ROADS
  • Recycling builds thicker asphalt bases, providing roads with a stronger foundation and renewing their lifespan to that of their original construction

Cold In-Place Recycling is one of the fastest growing road reconstruction techniques available. It is fast, cost-efficient, and can produce a strong base course using existing road material. When your asphalt roads have deteriorated to the point that they need to be reconstructed, consider utilizing Cold In-Place Recycling to build a stronger road base, save tax dollars, minimize traffic delays, and help conserve our valuable natural resources.

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