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
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.
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
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. Work is typically completed within the designated hours of Community Standards bylaw 5M2004:
- 7 a.m. to 10 p.m. Monday through Saturday.
- 9 a.m. to 10 p.m. on Sunday and statutory holidays.
Depending on the program, this work can take anywhere from 24 hours to three weeks to complete.
Concrete work can be done by City of Calgary crews or publically tendered to pre-qualified contractors. Contract work is awarded to increase The City’s capacity to maximize production.
The contractor will take several steps to minimize the impact and inconvenience to residents of the area in which work is being completed.
Prior to construction the contractor will deliver a notification to all residents directly affected by the construction, outlining the proposed construction and work schedule and what the property owner can do to help expedite the repair. Should any changes be made to the schedule, typically due to inclement weather, the contractor must notify all property owners as soon as possible.
Sprinkler systems, streetlights, private walkways, and driveways affected by the work are inspected prior to excavation for additional work that may be necessary.
The contractor will repair any damage to your grass, gutter, or walkway. The contractor will also ensure a temporary wooden walkway is set up if required, so you can safely cross the excavated area to access your property during the construction period. If necessary, a temporary gravel driveway can be set up. Please contact the contractor on- site if you require either accommodation.
- Read the notice delivered to your home prior to sidewalk construction. Review it carefully and follow any instructions to ensure safety and efficiency.
- Don't park on your driveway or in the marked work area for the dates specified in the notice.
- If your neighbourhood experiences any streetlamp outages during construction, please notify the City by filling out an online eService request. Crews will be dispatched to repair streetlight outages.
- If your property has an underground sprinkler system that is not readily visible, please notify the contractor before excavation begins to ensure it is not damaged during construction.
- Do not drive over or step on the new concrete until the contractor has removed all equipment, barriers, signs, and completed rehabilitation.