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Concrete construction programs

 

The City of Calgary has numerous programs for the construction, maintenance, and repair of concrete infrastructure. These programs begin when the frost is out of the ground (typically late May) and continue through October, weather permitting.

Slabjacking – concrete lifting

Slabjacking, also known as concrete lifting, corrects concrete settlement by creating a solid foundation under the slab and lifting the structure. Slabjacking is a cost effective alternative to excavation and replacement of concrete structures or other temporary maintenance repairs.
  • Eliminates trip hazards to improve safety and reduce potential legal liability.
  • Slows or stops deterioration of the pavement or sidewalk.

Slabjacking does not alter the appearance of a sidewalk in any significant way. Since most of the work occurs underneath the actual sidewalk the surface remains mostly undisturbed. Once slabjacking is finished, the sidewalk should be level.

  • Traffic cones, barricades, and signs are placed around work area to establish a safe work zone.
  • Injection holes are drilled in the uneven sidewalk panel or curb and gutter.
  • As the sidewalk panel is lifted, grout flows into all the voids beneath the slab and lifts the slab.
  • Once the lifting is complete, the core holes are filled with a high strength, rapid set grout and finished to match existing sidewalk.

Concrete sidewalk cutting

Sidewalk panels can settle unevenly due to soil conditions beneath the concrete and create tripping hazards. A cost effective and visually appealing alternative to sidewalk panel replacement, concrete sidewalk cutting is an efficient way to eliminate trip hazards on sidewalks.
  • Areas near poplar trees are targeted for cutting because they have shallow roots that cause lifting, and the trees are typically found in areas with high pedestrian traffic.
  • It takes no more than 15 minutes to identify, cut, and clean a trip hazard.
  • The process leaves surrounding landscape undisturbed and does not significantly alter the look of the sidewalk, leaving it smooth and safe for residents and pedestrians

Photo Gallery - Unclassified

  • Sidewalk cutting - Step 1
  • Sidewalk cutting - Step 2
  • Sidewalk cutting - Step 3
  • sidewalk cutting - Step 4

Concrete sidewalk frost repair

Soils susceptible to frost, like silt and clay, shrink when they are frozen and expand when heated, causing severe cracks in concrete sidewalks. This creates hazardous sidewalks in winter months when freeze-thaw cycles are common, and poses a safety risk if left unrepaired.

Photo Gallery - Unclassified

  • Sidewalk frost repair - Step 1
  • Sidewalk frost repair - Step 2
  • Sidewalk frost repair - Step 3
  • Sidewalk frost repair - Step 4

Miscellaneous concrete repair

Miscellaneous concrete repair replaces damaged concrete in sidewalks, curbs and gutters, traffic islands, divided medians, driveways, lane crossings and aprons. The City of Calgary uses an Annual Condition Survey to assess the severity of defects and to determine which locations need to be addressed first. Defects assessed are cracking, distortion, crumbling, trip edge, and catch basin displacement. Concrete removed by excavation permit activity is included.

Concrete construction and repair programs FAQ