Preparations for paving layer thickness setting before paving work.
Before paving, determine the large and small paving width and set the paver accordingly.
At the same time, the paving work needs to work closely with other departments on the site to ensure uninterrupted supply of materials and avoid excessive supply time.
The hopper car shall be arranged reasonably to avoid walking and stopping during paving.
Keep in touch with the mixing plant to ensure that the materials are supplied as planned.
Regularly check the use condition of the paver and timely maintain it (for example, check whether the oil level and water level, electrical and hydraulic functions are normal, etc.).
The thermal insulation tarpaulin of the hopper car shall be removed when the material is about to be delivered, so as to avoid the temperature reduction of the paving material.
Next, let's enter today's focus - paving layer thickness setting. Because the paving process is affected by many factors, so far there is no accurate formula to set the position of the screed elevation cylinder according to the expected thickness.
Therefore, when using the telescopic screed, generally follow the paving thickness in cm+(50 to 100%) value as the paving thickness set by the paver. This setting should be checked again a few meters before paving.
As we all know, the screed only provides pre-compaction, and the compactness should be achieved by the roller compaction. The compaction depth (W) of the roller is the difference between the paving thickness (H) and the expected paving thickness (S). This value should also be considered in advance when setting the screed
Since the screed is in floating mode, the expected paving thickness can only be achieved after a period of paving, so it is recommended to park the screed on the skid or evenly distributed material to start.
摊铺仰角的设定为摊铺厚度(H)+ (50 100%)，可通过仰角油缸上的刻度进行设置。鱼尾板在其标准位置。另外，应在开始摊铺时及时检查摊铺层厚度，以便需要时能够及时校正仰角油缸的位置。
The setting of paving elevation is paving thickness (H)+(50 to 100%), which can be set by the scale on the elevation cylinder. The fishplate is in its standard position. In addition, the thickness of the paving layer should be checked in time when paving is started, so that the position of the elevation cylinder can be corrected in time when necessary.
After compaction by the roller, the expected paving thickness must be checked. If it is inconsistent with the expected value, it shall be checked in time to make it reach the expected paving thickness.