We often see that municipal roads, residential roads, and other road surfaces are increasingly paved with asphalt, while concrete pavements are becoming less common.
This is mainly because asphalt pavements can be constructed quickly, shortening the construction period and reducing traffic disruption; they have lower construction costs, saving money and increasing return on investment; the construction technology is mature, ensuring quality and reducing risks; and the construction is flexible, allowing for modification and reuse as needed.

So, what are the key points for quality control in asphalt pavement paving construction?
I. Key Points of Quality Control Before Paving
1) Determine the paving route for the asphalt road, the driving routes for the paver and asphalt vehicles, minimize cold joints, and ensure that paving machinery and personnel are fully equipped;
2) Perform joint cutting and milling at the junction of the old road and the newly paved asphalt pavement (such as at major municipal intersections). Ensure the joints are straight and the overlap width between the old and new pavement layers is maintained, referencing 15MR201-29/30;
3) If the interval between the upper and lower layers is long, clean the road surface and wash away the soil from the lower layer before paving the next layer. To ensure thorough washing, use water trucks or fire hydrants on both sides of the road for high-pressure washing. After the lower asphalt pavement is dry, apply the tack coat;
4) Re-measure the base course elevation before paving (re-measure the upper course elevation for completed projects) to ensure the thickness of each layer. If the paving thickness cannot be guaranteed, mill the base course or lower layer to ensure paving quality, especially paying close attention to sections with flat curbs;
5) Control the elevation of manholes, storm drains, and drainage slopes. 6) Remove asphalt from areas of settlement and treat the base course and subgrade to ensure no further settlement after paving;
7) Deploy paving machinery appropriately, ensuring sufficient manpower, materials, and equipment. Adjust paving plans in case of strong winds, rain, or other severe weather;
8) Require the construction unit to prepare a paving plan and schedule before paving and conduct thorough briefings;
9) Reinstall damaged or settled curb stones;
10) Check whether manholes are covered by the base course or ground layer, check for missing drainage inlets, and check if manhole covers and grates need replacement. Add drainage inlets and connecting pipes promptly if any are missing at intersections or the lowest point of the road;
11) Check whether manhole covers are installed on cast-in-place concrete manhole casings or precast concrete manhole rings, and whether the area around the manhole casing is compacted and concrete poured according to design requirements;
12) Strengthen finished product protection by covering curb stones or paving with plastic film or tarpaulin to prevent contamination and affect appearance caused by the application of tack coats or seal coats. II. Key Points of Quality Control During Paving
1) In areas where the emulsifier was not applied properly by the machine, such as near curbs, starting and ending points, and corners, manual application is required for patching. Excess emulsifier should be scraped off. The tack coat should be applied one day before the surface layer construction. During paving, ensure that emulsion breaking and moisture evaporation are complete.
2) Before the paver officially begins paving, a loader, in conjunction with manual labor, should pre-pave areas deep within the paver, such as manholes (due to manhole cover adjustments, back excavation, etc.) and areas requiring settlement treatment, to prevent uneven paving thickness and large settlement deviations after compaction.
3) Paving 4) Control the paving temperature, compaction temperature, paving thickness, and compaction degree during the process;
5) Control the elevation and measure the entire process at special locations such as doorways, intersections, and around storm drains to prevent water accumulation or poor drainage;
6) When paving asphalt arrives on site, conduct random checks on the manufacturer's qualifications, mix proportions, receipts, and other documents to verify that the paving specifications and models are consistent with the design (e.g., whether the aggregate particle size is too large), and take raw material samples for testing according to batch;
7) If segregation or material shortage occurs, promptly dispatch personnel to spread 4.75mm thick asphalt. 7) Fill in the sieved residue with new asphalt mixture that meets the gradation requirements;
8) Ensure proper traffic control before and after paving. Unauthorized personnel and vehicles are strictly prohibited from passing through during paving;
9) The compaction principle is "light to heavy, low to high, steel wheels first, rubber wheels later, slow and even." Adjacent compaction areas should overlap by 1/3 of the wheel width and be greater than 30cm. Areas that cannot be compacted by the roller should be compacted using a small plate compactor. The roller is not allowed to remain on a road surface compacted at a temperature higher than 70℃;
01) Control the amount of asphalt on the first day of paving. Nighttime paving of the surface layer is strictly prohibited as it will affect the paving effect.
III. Key Points of Quality Control After Paving
1) Close traffic and protect the finished product. Non-motorized vehicles or pedestrians are allowed to pass when the asphalt pavement temperature is below 50 degrees Celsius. Motor vehicles are allowed to pass after 72 hours. For 1-2 months after paving, heavy and large vehicles should be restricted from making sharp turns, U-turns, and sudden braking to prevent wheel tracks and sand formation.
2) Clean up asphalt waste that has fallen into storm drains, manholes, and the construction site.
3) Before opening traffic, promptly organize the construction unit to install traffic markings.
4) After construction, conduct tests on the surface compaction, flatness, thickness, and drainage slope. Repair or replace contaminated or damaged curb stones promptly, and seal the core sampling locations with cold oil immediately.