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The vibration frequency of the paver screed should be around 55Hi, the screed amplitude should be in the range of 0.4-0.6, the ramming frequency should be within the range of 15-25 Hz, and the static pressure of the screed should be within the range of 15-25 Hz. Value within the range of 9-15 kPa. In order to make the working device of the paver and the RCC mixture have a good interaction effect, during the pre-paving test, the RCC mixture ratio parameters (including consistency) and the working parameters of the paver can be adjusted in small amounts at the same time. Based on the principle of good road surface.
When determining the paving speed V, observe and test the speed stability of the paver at low speed. If the speed is unstable, the paving speed should be increased appropriately. Experience has shown that when the paver works at a speed lower than 0.5m/min for a long time, the paver may "crawl", the paving speed may be unstable, and the engine may overheat. In addition, when determining the paving speed, consideration should be given to whether it is matched with mixing equipment and transportation equipment, so as to avoid stopping the paving in the middle of the paving and affecting the smoothness of the road.
Before paving, check whether the flatness of the roadbed meets the requirements to prevent the unevenness of the roadbed from being reflected to the road surface. The unevenness of the roadbed is well controlled within 8-3m ruler. From the perspective of ensuring the smoothness of the pavement, it is recommended to use high-density asphalt paver to pave the base in the construction of the base, so that the base has good flatness and sufficient strength. Before paving, the roadbed should be cleaned and sprayed with water to make it fully moistened to prevent the roadbed from absorbing the moisture of the RCC, resulting in a decrease in the water content of the mixture, and affecting the improvement and compactness of the RCC pavement.
The paving width should not exceed 8m, and the recommended paving width is 6m. Because when the paving width is large, the aggregate segregation in the process of conveying the RCC mixture from the center to the two sides is also large.