How to evaluate the operator’s understanding and mastery of the laser leveling machine operating procedures?

– Before construction, the site should be thoroughly cleaned to remove debris, garbage and loose parts of the original ground. For example, for the renovation project of old factory buildings, all oil stains and broken concrete blocks on the ground need to be cleaned up. For the base, if there is any unevenness, it needs to be repaired and compacted. If the base is a soil foundation, it should be layered and rolled according to the design requirements to make its compaction degree reach more than 90%, providing a solid foundation for concrete pouring. – At the same time, the drainage slope should be set. According to the purpose of the site and the design requirements, the general drainage slope is not less than 0.3% – 0.5%. Through precise measurement and layout, determine the drainage direction and slope control points to ensure smooth drainage and avoid water accumulation affecting the quality of the floor.   – Select qualified concrete raw materials, including cement, sand and gravel, admixtures, etc. Cement should be selected with strength grades that meet the design requirements, such as ordinary Portland cement P.O42.5 or P.O52.5, and the stability and setting time of cement should be checked. The particle size and mud content of sand and gravel should meet the specifications. For example, the maximum particle size of coarse aggregate should not be greater than 31.5mm, and the mud content should not exceed 1%; the mud content of fine aggregate should not exceed 3%. – Strictly design and test the concrete mix ratio. According to the use function of the floor (such as heavy-duty industrial floor, ordinary warehouse floor, etc.), strength requirements and construction environment, the best mix ratio is determined through laboratory trial mixing. During the construction process, concrete mixing should be carried out strictly according to the mix ratio, and the performance indicators such as slump of concrete should be tested regularly. The slump is generally controlled between 120-180mm to ensure good working performance of concrete.   – Before construction, fully commission the concrete laser leveling machine. Check the operating status of the engine or motor to ensure the normal operation of the power system. For example, the engine should start quickly, run smoothly, and have no abnormal noise and shaking. For the laser system, it is necessary to perform precise calibration and adjust the height and angle of the laser transmitter so that the laser plane it emits is consistent with the design elevation of the floor. – Calibrate the scraper, vibrator and other working parts of the leveler. The flatness error of the scraper should be controlled within ±1mm, and the frequency and amplitude of the vibrator should be adjusted according to factors such as the slump and thickness of the concrete. Generally, the vibration frequency is between 3000-5000 times/minute, and the amplitude is between 3-5mm to ensure that the concrete can be fully vibrated and leveled.   – Use appropriate concrete pouring methods, such as pumping or self-unloading. During the pouring process, the pouring speed and height should be controlled to avoid segregation of concrete. For example, when pumping concrete, the discharge port height should not exceed 1.5m, and the concrete should be evenly distributed on the site. – Use the spreading function of the laser leveler or cooperate with other spreading equipment to spread the concrete evenly on the site. The thickness of the material should be slightly higher than the design elevation, generally 10-20mm higher, to leave a margin for the leveling work. During the material laying process, care should be taken to avoid the accumulation of concrete in one place, resulting in excessive local thickness.   – When operating the laser leveling machine, the equipment should be kept moving at a uniform speed, and the speed is generally controlled between 1-2m/min. The operator should adjust the scraper height and vibration frequency of the leveling machine in time according to the laser signal and the automatic leveling function of the equipment. For example, when the laser receiver detects that the ground is higher than the design elevation, the leveling machine automatically adjusts the scraper to descend and scrapes off excess concrete; when it is lower than the design elevation, the scraper rises, and the vibrator strengthens the vibration to fill the low-lying area with concrete. – During the leveling process, attention should be paid to the connection of adjacent construction areas. The leveling work of adjacent areas should be completed before the initial setting of the concrete, and the flatness and density of the connection should be guaranteed. Generally, the overlapping construction method is adopted, and the overlapping width is between 10-20cm to ensure the flatness and integrity of the entire floor.   – Professional quality inspection personnel are equipped to check the flatness, density and elevation of the floor in real time during the construction process. Use tools such as level, 2m ruler and feeler gauge for inspection. For example, for each construction area (such as 100-200 square meters), use 2m ruler and feeler gauge to check the flatness, and the flatness error should be controlled within ±3mm; use level to check the elevation, and the elevation error should be controlled within ±5mm. – For parts that do not meet the quality requirements, timely adjustments and repairs should be made. If it is found that the local flatness exceeds the tolerance, it can be repaired by using a small leveling tool or manual smoothing method; for areas with insufficient density, use a flat vibrator to vibrate again or an inserted vibrator to supplement the vibration.   – After the concrete is leveled, the finishing treatment is carried out according to the use requirements of the floor. If it is an industrial floor that requires wear resistance, mechanical smoothing and manual fine smoothing can be carried out after the initial setting of the concrete. Mechanical troweling generally uses a driving trowel, and the number of troweling passes is not less than 3 times, so that the floor surface reaches a certain gloss and hardness. – After finishing, timely maintenance should be carried out. You can use methods such as covering with plastic film, straw mats or spraying curing agents. The curing time is determined according to factors such as the type of concrete and the ambient temperature, and is generally not less than 7-14 days. During the curing period, the concrete surface should be kept moist to avoid cracks in the concrete due to water loss.   – During the curing period, the floor should be protected as a finished product, and warning signs should be set up to prevent people and vehicles from walking or working on the floor that does not meet the strength requirements. For example, for heavy-duty industrial floors, heavy vehicles are strictly prohibited from passing when the concrete strength does not reach more than 70% of the design strength. – After the curing period, quality acceptance is carried out in accordance with design requirements and relevant standards. The acceptance content includes indicators such as the flatness, strength, and thickness of the floor. For example, the thickness and strength of the floor can be tested by core sampling, and the strength should reach the designed strength level; a laser flatness meter is used to test the flatness of the entire floor to ensure that the flatness of large-area floors meets quality requirements.

– Hand-push trowels are suitable for indoor scenes with relatively small areas. If the indoor space is relatively open and regular in shape, such as warehouses, large exhibition halls, etc., hand-push trowels can play a good role. It can be easily pushed on the flat ground to smooth the concrete and other floor materials. – However, if the indoor space is narrow and there are many obstacles or corners, the use of hand-push trowels may be restricted. Because its size and operation method determine that it is difficult to turn and operate in a small space. – For common indoor concrete, cement mortar and other floor materials, hand-push trowels can effectively smooth and compact the surface to make the floor smoother and smoother. It can handle newly poured floors and help remove surface defects such as bubbles and protruding pebbles. – However, if the floor material is special, such as wooden floors, epoxy floors, etc., which are relatively fragile or require extremely high surface accuracy, the hand-push trowel may not be suitable. Because its working principle is to operate through a rotating trowel blade, it may cause damage to these special floors. – The hand-push trowel is relatively simple to operate, and general operators can get started after simple training. It is pushed forward by manpower, and the direction and speed can be adjusted at any time according to the ground conditions during operation. For example, near the wall or pillar, you can slow down and operate carefully to avoid collision. – However, long-term use of the hand-push trowel requires certain arm and waist strength, and the operator may be more tired. – The hand-push trowel is small in size and is easier to move in indoor scenes. In indoor areas without large equipment access channels, it can be transported to the work site through small doorways or elevators. – However, compared with large driving trowels, its movement speed is slower, and work efficiency will be affected to a certain extent. – The hand-push trowel has a high speed. If the operator is not careful during operation, clothing, hair, etc. may be drawn into the machine, causing safety accidents. Therefore, the operator needs to wear appropriate work clothes and protective equipment, such as safety helmets, gloves, etc. – In addition, since the operation is indoors, the ground may be slippery, so be careful to prevent slipping when pushing the trowel. – The hand-push trowel will generate certain noise and dust when working. In small indoor scenes, the noise may interfere with the surrounding environment, so try to choose the right time to operate to avoid affecting others. – For dust problems, you can reduce its impact on indoor air quality by equipping a dust collection device or strengthening ventilation.

    The application of concrete laser levelling machine undoubtedly improves the efficiency of construction, realizes the saving of labor costs, and improves the economic benefits of engineering construction, but with the gradual maturity of the levelling machine technology, the types and models of the machines sold on the market are also increasing, however, only the suitable machine can play a multiplier effect with half the effort in construction. In order to help the majority of users to find a really professional and focused good brand good products, today we will talk about the purchase of concrete laser leveling machine a few points for attention. —- From the manufacturer's point of view —- « Do not choose low-price products to investigate the comprehensive strength » Consumers for a business, the purchase of trust is a comprehensive consideration. Price may account for 25 percent of that, but at the end of the day, what consumers value is a combination of factors. In today's increasingly rational consumption habits, low prices can only become a gimmick to attract consumers' attention, and the real measure of a company's success or failure is a sign of the company's product quality, after-sales service and its own strong strength. In the current shuffle trend of the concrete laser leveling machine industry is becoming more and more obvious, the terminal is not enough, the network is not perfect, the brand is not well-known enough enterprises, will face greater pressure. « Choose the leveler carefully choose the just starting brand » For this high-tech product of concrete laser levelling machine, in addition to technological innovation, there is another important factor that affects the quality, that is, experience. How to define the different models and specifications of laser leveling machine products? How to deal with the ground smoothness? Problems such as how to locate the laser transmitter require years of long-term accumulation in order to accurately grasp. When the user chooses the concrete laser leveling machine product, if he hastily buys the products of the entry-level brand, he is likely to become a "guinea pig" and encounter all kinds of trouble. To identify if a brand is new or not is as simple as looking at the time of its patent registration and looking at real cases in the past. —- —- From a product perspective « To clarify the difference between different models of products » Take two-wheel and four-wheel concrete laser levelling machine as an example: The construction flexibility of the two-wheel laser leveling machine is strong, and it is more suitable for the construction of castin floor, underground garage and some terrain or relatively complex working environment. The weight of the two-wheel machine is generally about 300kg, the leveling thickness is between 50-245cm, the operation is hand-pushed, the equipment has a high mobile efficiency, on the basis of achieving the ground flatness, it can also improve the efficiency of the work to a great extent, if the budget is less, the purchase of this model is more economical, about 2000 square meters per day can be easily done. It is a rare laser leveling equipment. The construction range of the four-wheel laser leveling machine is also very wide, which saves labor compared with the two wheels, and the equipment has built-in hydraulic drive, which effectively avoids the phenomenon of slipping during the construction process. Whether it is a large warehouse or multi-storey building can use four-wheel laser leveling machine to level the ground, the four-wheel weight is generally about 900 kg, the leveling thickness is between 60-300cm, the operation is a driving type, relatively easy to operate the two-wheel operator, the use effect of the equipment is comparable to many large leveling machines, and it is also a very cost-effective laser leveling equipment. In summary, the choice of the use of concrete laser levelling machine need to focus on two aspects of the problem, one is the performance and scope of application of the product itself, the second is the comprehensive strength of the manufacturer and brand trust, etc., no matter which aspect, consumers should give enough attention, do enough homework, so as to avoid economic losses caused by wrong selection and wrong use.