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Pavement repair programs

Pavement Rehabilitation Progarm Concrete Construction Program 

Along with the Pavement Rehabilitation Program, The City of Calgary also has a number of other paving programs that occur during construction season. These programs are designed to extend the life and maintain the performance quality of our roadways.

Full road reconstruction

Full road reconstruction consists of removing an existing road and replacing it with a new road.
  • As the most costly road rehabilitation method, full reconstruction is generally not the preferred option. However, if a road has extensive deterioration, alternative strategies such as surface overlay or spray patching may not be effective and constant repair is often more costly in the long run.
  • Full reconstruction allows the City to revise and select the appropriate pavement type necessary based on traffic use and the specific needs of a road.
  • Fully reconstructed roads last up to 20 years. Full reconstruction contracts are publicly tendered and awarded to pre-qualified contractors.
  • First, the asphalt and gravel on the existing road is excavated and removed to a disposal site.
  • Then, the sub base is evaluated and repaired as required. Next, the road is reconstructed to design road specifications for road classification.
  • When paving is complete, lane markings are applied and the road is opened for traffic.

The following four types of roads would require full reconstruction:

Photo Gallery - Unclassified

  • Full reconstruction - Alligator cracks
  • Full reconstruction - Large pothole
  • Full reconstruction - Longitudinal crack
  • Full reconstruction - Surface damage

Microsurfacing

Micro surfacing is the application of a special coating to the top layer of asphalt that prevents oxidization and moisture penetration. It is a cost effective preservation treatment to slow down the natural degradation of the road and preserve service life without a costly and disruptive reconstruction.

For more information on The City’s micro surfacing program, visit Calgary.ca/microsurfacing

Backfill densification

Backfill densification corrects settlements in the roadway by creating a solid foundation under the pavement by injecting a cement material into it. Done as a part of The City of Calgary's efforts to ensure safe and smooth roadways, the settled roadway is stabilized by coring strategically placed injection holes along the section of the roadway. Backfill densification is part of the mudjacking contract, it is publicly tendered and awarded to a pre-qualified contractor.

Upon completion, core holes are filled with high strength, rapid set grout. The roadway is rolled over and finished to match the existing structure. The benefits of backfill densification include:

  • No excavation is required.
  • The surrounding landscaping is left undisturbed.
  • Further settlement of the soil is prevented.
  • Slows or stops the deterioration of pavement.
  • More aesthetically appealing than patches.
  • Quick repair, minimal inconvenience to vehicular traffic.

Crack Sealing

Crack sealing is a rehabilitation method used to keep excess water or moisture from penetrating asphalt and to prevent further cracking and deterioration of city streets.
  • Completed on roads that are least three years old, crack sealing prolongs the lifespan of the asphalt by creating permanent seals.
  • It is a cost effective method that requires a relatively small crew. It can be done very quickly and roads can be driven on shortly after sealing is completed, keeping traffic disruptions and closures to a minimum.

The following road shows the process of crack sealing from identification to completion:

Photo Gallery - Unclassified

  • Crack sealing - Step 1
  • Crack sealing - Step 2
  • Crack sealing - Step 3
  • Crack sealing - Step 4

Spray Patching

Spray patching is a quick, efficient, and cost effective way to patch cracked and damaged pavement. An emulsified mixture of asphalt and gravel seals the damaged areas and rejuvenates the pavement. The benefits include:
  • Several types of road defects can be repaired quickly, including large cracks, potholes, localized ravelling, localized alligator cracking, and gaps at the lip of gutters.
  • Spray patching is a quick process that takes approximately 15 minutes to cure. You can safely drive over the area immediately after it has been patched.
  • Spray patching is about half the cost of conventional paving, enabling tax dollars to be invested into other initiatives aimed at improving our roads.
  • Most neighbourhoods and roads can be spray patched without any road closures.

Here is an example of spray patching:

Photo Gallery - Unclassified

  • Spray patching - Before
  • Spray patching - After

Road pavement repair programs FAQ