How is the paving and compaction of limestone base layer performed?
After limestone soil is mixed, it needs to be paved and rolled, and two tasks must be done when paving. First, the moisture content should be rolled under the optimum moisture content. One of the inspection methods is the measurement of the baking method. The amount of water, the other is the use of empirical methods, such as holding a handful of lime soil, a grip, lime soil into a group, and hands hold no watermark, the gray soil from the height of 50cm, free fall, broken into garlic , From the height of 100cm to landing, into the loose state can be considered qualified water content. The second is the paving virtual thickness, the control of the virtual thickness is not good, it is difficult to trim after rolling, high, low, lime soil, the virtual thickness is generally 1.6 to 1.8 times the thickness of the actual structure, with the artificial leveling can be Rolling. The paving thickness of lime soil is shown in the table below. Lime soil paving thickness thickness 15(cm) 20(cm) Paving thickness Mix ratio Soil thickness (cm) Lime thickness (cm) Soil thickness (cm) Lime thickness (cm) 10% lime soil 15~16 22~24 5 20~21 30~32 7 12% lime soil 15~16 22~24 6 20~21 30~32 8 14% lime soil 15~16 21~23 7.8 20~21 28~31 10.5 After the paving of lime soil, the height of the design and the slope shall be checked again for correctness. After the limestone is paved, there are the following steps: The first step is voltage regulation: This step is the last step to check limestone soil, and it is also an essential condition for compaction. Through regulation, we can find the internal conditions of limestone soil, the thickness of paving and the lack of elevation leveling. Voltage regulation is carried out with 6~8t light steel two-wheel rollers. It can also be carried out using crawler tractors. It is carried out from the low point of track and field to a high place. It must be rolled at a low speed. Stop grinding after two passes, immediately check, elevation, slope, thickness, check the surface for cracks, peeling, dry loose, tumbling and other phenomena, found a place, deal with a place, and finally leveling. Regulatory pressure is an indispensable process, and you can begin rolling it out after completion. The second step regrind survival: After preliminary voltage regulation, after inspection and dressing, immediately refit the regrind, steel light wheel 12t, starting from the low point of track and field venues, rolling, with a speed of 60m/min ~ 70m/min rolling 4 ~6 times, each time to overlap the width of the rear wheel 1/2 ~ 1/3, (three roller). The third step of survival inspection: Immediately after completion of roller compaction, a project inspection, such as compaction test, flatness, etc. Finally, trimming, for higher places, can be leveled with a flat machine, for the lower places, the first planing pine 8~10cm, mixed with a good mix of lime soil, after leveling, with an artificial foot close step, step on Really rolling again, generally 4 to 6 times can be completed. The ground layer of lime soil after rolling should be sprinkled and cured for not less than 7 days. Custom Master Advanced Viola,High Grade Violas,Advanced Solid Wood Viola,General Grade Student Viola Queshan Wahyo Violin Ltd , https://www.wahyoviolin.com