1. Data supply
(1) Selection of concrete materials for concrete materials 砼: Selecting the best to choose, with strong supply capacity, guaranteed quality, and good credit manufacturers to supply 砼 for this project.
(2) Accurately calculate the usage according to the construction schedule and make an early booking with the manufacturer for timely supply.
2. Laying of concrete: The thickness of the concrete cushion is 150MM. In order to control the flatness of the cushion, small piles are driven into the soil layer with a spacing of 2M, and the horizontal elevation line is drawn on the pile to make the cushion flat. Sprinkle water on the ground floor before laying the concrete, and then divide it in steps of 6M in the short direction of the site and pour in sequence along the long direction. In order to ensure that the cracks are not shortened along the length of the ridge, when the ridge strength is increased to the point where it can be cut with a cutting machine, it is cut in 6M length steps.
3. Vibration: Paving the concrete with an iron harrow, the thickness is slightly higher than the top level, and then vibrating with a flat vibrator. When the thickness exceeds 20cm, a penetrating vibrator should be selected, and its moving interval should not be greater than 1.5 times the radius of the effect to prevent leakage and ensure that the concrete is dense.
4. Leveling: After the concrete is vibrated and compacted, check the flatness according to the horizontal elevation line, shovel it high, and fill the recess. Use a horizontal wooden scraper to smooth it out, and then use a wooden trowel to smooth it out. Ground with slope requirements shall be made according to the slope required by the plan.
5. Maintenance: The concrete cushion layer that has been poured shall be covered and sprinkled at about 12h, and the general maintenance shall not be less than 7d.
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