After the recycled mixture is evenly mixed and stabilized once by a vibrating roller, it should be preliminarily shaped using a grader immediately. On straight and non elevated flat curve sections, the grader scrapes the road from the shoulder to the center of the road; When setting a super high flat curve section, the grader scrapes it 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 by more than 5cm, and level it with freshly mixed mixture. During the shaping process, the segregation of coarse and fine materials should be promptly eliminated. Both manual and mechanical removal of large, unbroken old road materials. When shaping, the high materials should be directly scraped out and should not form a thin layer of patching.
After the initial leveling of the grader is completed, the vibration roller stabilizes the high amplitude/low frequency once, and then the surveyor sets out and controls the elevation and cross slope at three points, namely left, middle, and right, according to quality control requirements (1 point at a straight section of 20 meters and 1 point at a bend of 10 meters), guiding the grader to carry out detailed leveling and achieve the purpose of adjusting the arch and slope. Ensure that the flatness and cross slope meet the design requirements. During construction, the principle of "better scraping than filling" should be adhered to. If additional materials are needed, when it is determined that a mixture of 5cm or more needs to be added, more cement should be added to the new material and the water content should be ensured to ensure adhesion. During rolling, it should not be loose or peeling.
When using a grader for final leveling work, special care must be taken to ensure that the entire surface is scraped flat, making it longitudinally smooth, and the road arches and superelevation meet the design requirements. Do not drop the blade in low-lying areas. It is necessary to scrape off the locally raised part and sweep it out, because there is no bonding force between these materials and the lower layer, which can easily cause peeling and inability to press during rolling. The final leveling should be carried out carefully, and for local low-lying areas, no further filling is required. It can be left for treatment when laying the asphalt surface layer.
After leveling, use a vibrating roller to perform 1-2 rounds of compaction. If the surface of the mixture is air dried before compaction, use a sprinkler truck to spray and replenish water if necessary to prevent it from being crushed. During initial compaction, use high amplitude/low frequency vibration modes to compact the lower part of the layer, and then use low amplitude/high frequency vibration modes to compact the upper part of the regeneration layer. The principle of rolling is to start with light and then heavy, rolling from the roadside to the middle of the road in sequence. The rolling speed should be controlled at a low speed, and attention should be paid to the width of the wrong wheel and not to miss the rolling. In addition, when using a vibratory roller, attention should be paid to the following points: if there are oil and gas pipelines crossing within a range of 1 meter on both sides of the road, vibration mode compaction cannot be used. The use of high amplitude/low frequency vibration modes for compaction often disturbs the material at the top of the layer, especially the surface. However, leveling with a grader can be corrected before using low amplitude/high frequency vibration mode for compaction. If the material continues to be compacted after reaching its high density, it will damage the material and reduce its density. Prevent overpressure based on the thickness and external manifestation of the mixture.
The roller is driven at low speed in first gear, and the two rollers are designed to cross the centerline of the road construction when half of the large wheels can be interchanged. When the rear wheels have completed the full width of the road surface, it is considered as one pass. Roll 2-3 times, with the principle of rolling from both sides to the middle of the road to maintain the road arch. Afterwards, the vibrating roller quickly walks once to remove obvious wheel marks, and the rolling is completed. It is strictly prohibited for road rollers to turn around or brake sharply on completed or ongoing road sections, and the surface of the regeneration layer should be ensured not to be damaged. During the compaction process, the surface of the regeneration layer should always be kept moist. If the water evaporates too quickly, a small amount of water should be sprinkled in a timely manner, but it is strictly prohibited to sprinkle a large amount of water for compaction. During the rolling process, if there are "springs", looseness, peeling and other phenomena, they should be promptly flipped open and mixed again (with an appropriate amount of cement) or treated with other methods to meet the quality requirements.
With the summary above on cold regeneration machine leasing, we hope it can be helpful to our customers. If you have any questions or need help, please click on our website: http://www.qhuique.com Or call to inquire, we will do our best to solve it for you
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