Below are Colt’s standard construction specifications and will be used UNLESS OTHERWISE STATED in the work item description or plans provided by customer.
Barricades and Safety
All exterior construction areas will be adequately closed off with barricades, pylons or yellow caution tape. Barriers around new concrete pavement and curbs will remain in place for 5 days; new concrete sidewalks 24 hours; new asphalt pavement 3 days to ensure material is fully cured for traffic.
Existing pavement, curb and sidewalk needing removal will be saw-cut into sections/blocks or perimeter cut and demolished using breaker/hammer and then removed by appropriate equipment. Concrete slurry resulting from concrete saw operation will be vacuumed and removed from site. All materials removed during demolition will be removed from site.
Subgrade Preparation and Stabilization
Subgrade will be excavated and either FlexBase for pavement/curbs or Fine Grade FlexBase for sidewalks will be added & compacted as necessary to ensure desired compaction/surface preparation is achieved & lines are brought to the required grades for placement of new concrete.
All drive, curb and sidewalk paving shall be designed to have a minimum compressive strength of 3,500 psi at twenty-eight (28) days and placed at a depth of 4” for sidewalk, 6” for pavement and 12” for curbs. Concrete will have a camel hair broom finish. Note: A curing compound will be applied during the hot months of the year (with daily temperatures exceeding approx. 95°) to protect it from drying out too quickly resulting in a weaker finish with higher tendencies toward cracking and spalling.
- Paving and Sidewalk
No. 3 deformed steel rebar placed on 18” centers each way.
2 continuous lines of No. 3 deformed steel rebar.
- Expansion Joints
No. 3 deformed steel rebar dowels 24” long placed on 18” centers and located at mid-depth.
- Longitudinal Butt Joints (into existing paving)
No. 3 deformed steel rebar dowels 20” long placed on 18” centers, located at mid-depth and drilled 8” into existing pavement.
Expansion and Control Joints
- Expansion Joints
Redwood will be placed from subgrade to pavement grade and spaced at 60’ or to match to existing. A felt-based expansion material will be against existing slabs/foundations.
- Control Joints
in pavement will be green-sawed at 15’ intervals or to match to existing; sidewalks will be troweled at intervals equal to width or to match existing.
Note: All joints will be sealed to match existing.
Clean existing area with “Power Broom” and/or “Billy Goat” as needed. Apply a tack coat over entire surface area. Install 2” of Hot Asphalt Type “D” topping. Roll to compaction with a steel wheel vibratory roller.
Perimeter of area to be saw cut & removed to a depth of 6” and sub-grade compacted. Tack and install a 4” binder base of Hot Asphalt Type “B” followed by a topping base of Hot Asphalt Type “D” rolled with steel wheel vibratory roller to a compacted depth of approx. 2” and flush with adjacent gutter.
Existing asphalt to be milled to a depth of 8” adding 6% of Portland cement by weight finishing with water& compaction to depth of 6”. Prime coat to be placed over entire surface of newly prepared subgrade. Hot asphalt type “D” will then be placed rolled with steel wheel vibratory roller to a compacted depth of approx. 2” and flush with adjacent grades.
Clean existing area with “Power Broom” and/or “Billy Goat” as needed. Treat areas of petroleum saturation & prime with a heavy-duty bonding agent to promote surface adhesion. Apply 2 coats of Coal Tar Pitch Emulsion protective coating at 1 gallon per 45 sq. ft. Six pounds of sand to be added per 1 gallon of coal tar. TarmaxR-100 will be mixed at 4 gallons per 100 gallons of coal tar.