What are the benefits of using a laser leveling machine for concrete construction?

The process of positioning and reflection achieved by the laser scanning system of the laser leveling machine is as follows: Laser leveling machines use laser beams to detect and adjust the flatness of object surfaces. The laser beam is generated by a launch system and illuminated on a plane mirror. The plane mirror reflects the laser light onto the surface of the object, forming a spot. The position change of the light spot is detected by a high-precision displacement sensor. In this way, the height difference on the surface of the object can be calculated. The displacement sensor transmits the detected signal to the control system, and the control system controls the position and energy of the laser beam through the feedback control system. The control system adjusts the position and energy of the laser beam according to the preset flatness requirements and sensor feedback information, thereby adjusting the flatness of the object surface. During the adjustment process, the laser beam continuously scans the surface of the object and makes corrections based on feedback information from the sensor until the predetermined flatness requirements are reached. The above content is for reference only. If you need more comprehensive and accurate information, you can check the working principle or operating instructions of the laser leveling machine or consult our business manager.

Most of the soil floor is not reinforced, or only nominal reinforcement measures are taken to control the crack width. Reinforcing steel bars placed at the top or top of the floor slab can limit the random crack width due to concrete shrinkage, temperature stress, foundation settlement, external loads, and other problems. This type of reinforcement is commonly referred to as shrinkage and temperature enhancement devices. Shrinkage and temperature enhancement are different from structural reinforcement. Structural reinforcement is usually placed at the bottom of the concrete slab to enhance the load bearing capacity of the floor slab. Most of the soil-bearing structural floors are provided with upper and lower reinforcements at the same time, while controlling the crack width and enhancing the bearing capacity. Due to the construction feasibility and cost of the double-layer reinforcement method, the soil-bearing structure floor is not as common as the non-structure floor.   Basic principle If the concrete slab is laid on a high quality base and ensures good support, while using low shrinkage concrete material, the joint spacing is set at 4.5 m or less and installed correctly, there is generally no need for reinforcement. In general, there is almost no cracking at random or non-seam areas. If random cracks do occur, the crack width should also be kept small due to the small joint spacing and the low shrinkage of the concrete material, thus avoiding the problem of subsequent repair or maintenance. When concrete slabs are laid on low-quality bases with more problems, there is a risk of uneven support. When ordinary or high-shrinkage concrete materials or joint spacing exceeds 4.5 m, it is necessary to take reinforcement measures to limit the occurrence of Crack width. When the crack width develops and increases to about 0.9 mm, the load transfer effect of the aggregate locking disappears, causing vertical displacement cracking or "destruction" of the concrete slab.   Once this happens, the edges of the crack are exposed, and blasting is likely to occur; and the concrete slab is subject to wheel compaction, especially when high-level forklifts with hard wheels are crushed. Once the blasting phenomenon begins, the crack width of the surface will increase, and the damage of the concrete slab along the crack will deteriorate rapidly.   Shrinkage and temperature enhancement methods are required where shrinkage joints are not allowed on site and are not installed. Sometimes, this method is also known as continuous enhancement or seamless flooring, and a large number of closely spaced (90-180 cm) small cracks are allowed on the floor panel.   Crack control method Generally, there are two methods for controlling the crack in the soil floor:  (1) controlling the location of the crack by installing a shrinkage joint (the crack width cannot be controlled),  (2) controlling the crack width by installing a reinforcement device (the crack position cannot be controlled).   Using Method 1, we can control the cracking position of the concrete slab; the width of the shrink joint or the crack in the joint is largely controlled by the joint spacing and concrete shrinkage. As the seam spacing and concrete shrinkage increase, the seam width also increases. Similar to the crack, if the seam width is close to about 0.9 mm, the efficiency of locking and transferring the aggregate between the aggregates and avoiding vertical displacement between the seams is greatly reduced. In view of this, many designers use load-conducting designs such as force-transmitting rods, force-transmitting sheets, or continuity-enhancing devices at the shrink seam position to ensure good load transfer and limit vertical displacement between seams.   Using Method 2, we allow random cracking of the concrete slab, but with reinforced steel or welded mesh to control the crack width. In general, this method is not used when setting a shrink seam. Cracking occurs randomly, forming numerous numerous intertwined small cracks. Due to the appearance considerations, this type of crack control method needs to communicate with the owner in advance. If your device has an accident, don't worry! When you choose Vanse equipment, you also choose to have peace of mind after-sales protection. We provide quality after-sales service for all customers 365 days a day. If you have any problems with your equipment, please feel free to contact us at any time. Remote telephone after-sales guidance is an efficient after-sales support method. Our after-sales service engineers will get in touch with you as soon as possible and help you to restore the normal operation of the equipment as soon as possible.   Vanse Service, anywhere and anytime!!!

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.