Technical Knowledge
Concrete laser leveling machine construction plan
The technical construction of laser leveling machine is a brand-new design concept. The application of leveling machine has become a popular trend in the modern concrete industry. However, what is the technical solution of laser leveling machine? Let's introduce it in detail below.
1. Requirements for concrete
❶ Concrete must be produced by commercial concrete production plants, transported or pumped to the floor project site.
❷ Concrete specifications: C25~C30 concrete, the 28-day strength is not less than 25MPa, according to the design requirements.
❸ Water-cement ratio: no greater than 1. Do not add water at will during the feeding process.
❹ Cement: Use ordinary Portland cement not less than the grade.
❺ Aggregate: Well-graded aggregates should be used. Use crushed granite or pebbles as coarse aggregate, with the maximum diameter not larger than 25mm. Clean river sand is used as fine aggregate, and the fineness modulus is appropriate.
❻ Concrete mix ratio: cement dosage should not be less than 350Kg/m3. In order to avoid surface quality problems, the sand rate should be controlled at 35%~40%
❼ Concrete slump: 14+2cm, maximum 16cm
❽ Setting time: The initial setting time should be controlled at 3-5 hours.
2. Construction coordination requirements
❶ The concrete feeding speed should be determined according to the ground thickness and pouring area. The minimum hourly feeding speed should be determined. For a floor with a thickness of 200 mm, if the one-time pouring width reaches 40 meters, the minimum feeding speed should reach 40 cubic meters per hour. Otherwise, cold joint problems will occur and the quality of the ground construction will be affected.
❷ Manual cooperation requires workers to remove the concrete delivered to the floor as soon as possible and roughly level it. In addition, manual leveling is required for areas around the formwork, walls, columns, trenches, equipment foundations, floor drains or pipelines that cannot be leveled. Generally, 3-4 workers are required to cooperate with the construction (provided by Party A).
❸ Other precautions: To ensure the flatness of the ground, please note:
① The slump of the concrete delivered to the floor must be consistent each time.
② Ensure that the concrete supply speed reaches 40 cubic meters per hour or above, and the initial setting time of each batch of concrete must be consistent.
③ Ensure that the formwork elevation is accurate and cannot be disturbed during construction.
④Environmental cooperation. The newly constructed concrete floor should not be exposed to sunlight, wind, rain and other environments that are detrimental to the health of concrete.
❹ Other requirements:
A. In order to avoid random cracks on the floor, shrinkage joints should be cut as early as possible (within 24 hours).
B. While the laser leveling machine is being constructed, there must be no welding machines or reflective objects (such as glass windows) on site.
C. The foundation must reach a certain hardness to ensure that the laser leveler does not collapse when operating on the ground.
D. The height of the ground in the factory building is calibrated by Party A. The points must be evenly distributed and there must be no error in level.
E. Concrete pouring must be carried out according to the requirements of Party B's technical personnel.
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About the Author: Shandong Vanse Machinery Technology Co., Ltd.
Shandong Vanse Machinery Technology Co., Ltd. is a high-tech manufacturer specializing in concrete construction machinery, including laser screeds and related equipment. The company integrates R&D, production, and global sales, with products exported to over 60 countries and widely used in infrastructure projects worldwide.
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