For the paving operation of permeable asphalt mixture, fully automatic leveling of asphalt concrete pavers shall be used. Before paving, the width of the paving machine shall be adjusted to one-fifth of one-half of the football pitch and paved from the end of the football field. At the other end, starting from the sideline begins to move toward the center of the football field. The starting point of the paving of the football field shall be determined outside the end line. Place the paver at the place and place two sign boards on the screed. (The board length is 100cm and the width is 10cm. The thickness is the structure thickness of the point plus the thickness of the virtual shop). Due to the error in the construction of the grass-roots level, the design thickness cannot be used. Actual measurements should be made at the site. The height of the signage plate = design elevation + imaginary thickness at this point. The two logo plates are placed in parallel with a distance of 100cm. Each side of the paving machine is 50cm on each side, and it is placed steadily. Asphalt paver requires sensors on both sides and sensors travel on all sides of the reference line. After the first paving, the second paving was continued. At this time, the base line was intermittently used on the side of the paving to accommodate the sensors, while the other side used the large slides of the paver itself. On the paved asphalt mixture, slides less than 50cm in length cannot be used.
The paver paving mixture's virtual thickness can be used from 1.15 to 1.3. It can also be measured on site.
The temperature of the asphalt mixture during the operation of the paver is normal temperature construction, controlled at 110-140°C, low temperature construction, controlled at 120-140°C, but should not exceed 150-170°C. The paver should operate slowly and evenly and continuously. It should be operated as much as possible without interruption. After the start of paving, the elevation of the paving surface should be promptly checked when it is 2 to 5 m. When errors occur, adjustments must be made in time. The entire operation process should be based on design height to check the effect of paving, and pavers should not be adjusted by paving thickness, because paving thickness is related to the quality of grass-roots construction. If paving thickness is the standard, the effect of paving may not be achieved. To flatness requirements.
After the paver finishes the paving operation, it is forbidden to carry out manual maneuvering and replenishing operations before being rolled, and it is forbidden to walk on the people.
The asphalt mixture rolling work, after the paving operation, checks the temperature to be suitable for rolling and rolling. The beginning of grinding is a light steel two-wheel roller. The rolling weight is regulated at 6~8t. The vibratory roller cannot be used and the vibration operation can be turned off. After the voltage is regulated, recompression is performed. The roller is changed to a heavy-duty steel roller compactor with a grind weight of 10~12t. The vibratory roller can also be used to control the temperature of the bituminous mixture during the roller compaction process. The temperature is 110~140°C during normal temperature construction work. , No lower than 110°C, low temperature construction is 120~150°C, minimum is no lower than 110°C, and the temperature at the end of roller compaction should not be lower than 70°C.
The speed of the roller must be steady, and the uranium must not be misjudged when it is stopped. The speed of the roller can be seen in the table below.
Roller rolling speed (km/h)
Roller type | Initial rolling | Recompression stage | Final pressure stage | |||
speed | no greater than | speed | no greater than | speed | no greater than | |
Steel roller | 1.5~2 | 3 | 2.5~3.5 | 5 | 2.5~3.5 | 5 |
Tire roller | - | - | 3.5~4.5 | 8 | 4~6 | 8 |
Vibratory roller | 1.5~2 (static pressure) | 5 (static pressure) | 4~5 (vibration) | 4~5 (vibration) | 2~3 (static pressure) | 5 (static pressure) |
When a tire roller is used, the total mass is not less than 5t, and the width of the roller compaction with adjacent rolling overlap is 1/3 to 1/2. When a three-wheel drum roller is used, the total mass should not be less than 12t, and the adjacent roller belts should overlap 1/2 of the width of the rear wheel. When vibratory rollers are used, the vibration frequency should be 35~50Hz, the amplitude should be 0.3~0.8mm, and the overlap width of adjacent rolling belts should be 10~20cm.
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