Heavy Civil Outdoor Paving Ajax

Step 1, Define vehicles, axle repetitions, turning, braking, fire routes, drainage, frost, pavement design, utilities, staging, testing, and opening criteria.

Step 2, Remove unsuitable materials, proof and correct subgrade, install separation or drainage, and build tested granular layers.

Step 3, Coordinate structures, curbs, concrete interfaces, joints, elevations, access, and production before final surfacing.

Step 4, Place asphalt, concrete, or units under material, thickness, temperature, density, finish, joint, cure, and survey controls.

Step 5, Verify ride, drainage, transitions, markings, protection, and opening strength or temperature before operational traffic.

Harrowgate builds and verifies each pavement layer before covering it. Work progresses from drainage and subgrade through controlled granular lifts, structures and curbs, asphalt or concrete placement, density and elevation checks, tie-ins, and final markings under a traffic-management plan.

Survey and investigation. We establish benchmarks, pavement limits, drainage grades, tie-ins, and structure elevations. Boreholes, test pits, proof rolling, cores, and milling records identify soil, granular depth, asphalt thickness, concrete, moisture, and buried failures. Utility conflicts and contaminated or unsuitable material are resolved before production paving.

Excavation and subgrade improvement. Failed pavement and base are removed to the designed depth. Yielding subgrade is undercut and replaced, dried, stabilized, or reinforced under geotechnical direction. The surface is shaped for drainage and compacted at suitable moisture. Geotextile or geogrid is placed without wrinkles and covered before construction traffic damages it.

Drainage and granular structure. Subdrains, outlets, catch basins, maintenance holes, and culverts are installed or adjusted before final base. Granular subbase and base meeting OPSS requirements are placed in controlled lifts, moisture-conditioned, graded, and compacted. Density, proof roll, and elevations are accepted before asphalt or concrete hides the work.

Asphalt paving. Tack coat bonds asphalt layers and vertical faces. Mix is delivered hot enough for placement and compaction, transferred without segregation, and laid continuously where possible. Roller pattern follows temperature and density response. Longitudinal and transverse joints are cut or formed cleanly, coated, and compacted while the adjacent mix remains workable.

Concrete paving. Forms or slipform control line and grade, dowels and tie bars are positioned, and CSA A23.1 concrete is placed and consolidated. Surface texture, joints, curing, and sawcut timing follow the design. Cold-weather or hot-weather protection maintains concrete conditions, and traffic waits for specified strength rather than a fixed calendar assumption.

Tie-ins and turnover. Existing pavement is milled or sawcut to a sound straight interface, structures are set flush, and shoulders or curbs are restored. We review smoothness, drainage, density and strength results, joint construction, segregation, marks, and edge support. Line marking follows only after the surface meets the material and cure requirements.

Harrowgate submits survey and quality records required by the contract, including granular density, asphalt temperature and compaction, concrete tests, material tickets, structure adjustments, and marked changes. Final inspection includes drainage after rainfall where possible, joint and tie-in review, shoulder support, clean structures, and removal of temporary traffic controls in the approved sequence.