After the cold regenerator mixes the recycled mixture evenly and stabilizes it once by the vibratory roller, the grader shall be used immediately for preliminary shaping. In straight and non-flat curve sections, the grader shall level from the shoulder to the middle of the road; In the set flat curve section, the grader shall level from the inside to the outside.
If necessary, go back and scrape again. For local low-lying areas, use an iron pick to loosen the surface layer more than 5cm, and use the freshly mixed mixture for leveling. The segregation of coarse and fine materials shall be eliminated in time during the shaping process. The large pieces of old road materials that have not been broken shall be removed manually and mechanically. During shaping, the high materials should be directly scraped out of the way, and there should be no thin layer of patching.
After the initial leveling is completed, the vibratory roller shall stabilize the high amplitude/low frequency voltage once, and then the surveyor shall set out and control the elevation and cross slope at the left, middle and right points according to the quality control requirements (one point at 20 meters in the straight section and one point at 10 meters in the curve), and carry out careful leveling to achieve the purpose of camber and slope adjustment. Ensure that the flatness and cross slope meet the design requirements.
During the construction of the cold recycling machine, the principle of "scraping rather than patching" should be adhered to. If it is necessary to make up, when it is determined to make up more than 5cm of mixture, it is necessary to add more cement and ensure the water content in the new material to ensure the cohesiveness, and it is not loose and peeling when rolling. During the final leveling work, special care must be taken to ensure that the entire surface is scraped to make it longitudinal and comfortable, and the road camber meets the design requirements.
The leasing manufacturer of the cold regenerator reminded that the blade should not be dropped in the low-lying place, and the part higher than the blade should be scraped off and swept out, because there is no adhesive force between these materials and the underlying material, and it is easy to cause peeling and crushing when rolling. The final leveling shall be carried out carefully. For local low-lying areas, no need to make up, but can be left for treatment when paving the asphalt surface course.
After leveling, carry out 1-2 times of rolling compaction. If the surface of the mixture is dried before rolling compaction, spray water with a watering cart to prevent it from being crushed. The high amplitude/low frequency vibration mode is used for initial compaction to compact the lower part of the layer, and then the low amplitude/high frequency vibration mode is used to compact the upper part of the regeneration layer. The rolling shall be carried out from light to heavy, from the roadside to the middle of the road in turn, and the rolling speed shall be controlled at a low speed. Pay attention to the width of the staggered wheels and do not miss the rolling.
Due to the relationship between cement, during the construction period, from mixing with water to rolling and forming, watering and curing shall not exceed 4 hours.
The above is a detailed introduction of the cold regenerator for you, and I hope it will help you. If you have any questions, please contact us https://www.sddhfjx.com 。