Name of Project:
Paving Contractor/Asphalt Producer:
Ensure that asphalt contractors and producers are all on the approved lists provided annually by our Lab.
Remind Contractor to implement paving Policy and Procedures received from you in the pre-construction meeting.
Verify that grade is true to County approved cross section and alignment. Subgrade soil has to be free of ruts, contamination, excess dust, stone larger than 3 inches, mud, frozen materials, and recycled materials.
Witness and approve of Proof-rolling but not many days before paving, as approvals expire if it rains.
Before paving, subgrade has to be still firmly compacted, unaffected by weather or construction traffic
Unless otherwise specified, subbase material must be CR-6 stone mix with 6O typical compacted thickness.
Before tack-coating, the existing HMA course must be free of puddled water, milling debris, defects, and trash.
Before applying tack-coat, utilities must be sufficiently raised to allow for the approved HMA thickness.
Tack must be applied thinly but evenly on existing course and all vertical edges (joints, curbs, utility edges).
Ensure that a Technician with current Certification and copies of our Policy & Procedures is on site before paving starts.
Observe arriving loads for proper mix size, minimal segregation, consistent color, and being tarp-covered
Collect and check asphalt delivery tickets for correct information (project name, mix ID, tonnage, time, etc.).
Check HMA temperature while being loaded into the paver, and/or behind the roller, after its first pass.
Paver to maintain correct line, grade, and cross slope; and to minimize automatic controls adjustment.
Paver to maintain calculated speed that minimizes its stop/start movements without depleting its hopper.
Rolling to be as continuous as possible, and at a consistent “walking speed” during all compaction stages.
Paving equipment and vehicles should be adequate & sufficient for the weather and the job, and leakage free.
Joints should be tight and FLUSH with adjacent surfaces. Longitudinal joints to be overlapped per MD SHA.
Mat should have uniform appearance, free of visible marks and defects, except for a line along longitudinal joints.
Technician must call Inspector prior to core cutting & box sampling so Inspector can witness it, if available.
Contractor must cut QA cores for the County Inspector on site, and cores for his own mandatory QC testing.
Contractors must provide 5 cores/mix/day with noted locations unless otherwise instructed by Inspector
QA cores shall come with Cores Lab-Analysis form, and behind-t-paver box samples with a HMA-1 form.
Document on CTR & your report: weather conditions, suspicious rollers’ type/size, and other issues.
This is to certify that suspected asphalt/paving problems were tactfully conveyed to Contractor’s Foreman for his cooperation, then to the District Engineer and Lab Engineer at a.m./ p.m. of the day of paving when Contractor failed/refused to make adjustments that may correct, prevent, or reduce such problems.
Source: MaintainX (Community Member)