Technical & Industry Knowledge Base

Concrete curing is a key link to ensure the quality of concrete. The following points need to be noted: 1. Maintain appropriate humidity and temperature: During concrete curing, appropriate humidity and temperature should be maintained to promote the hardening and strength development of the concrete. Excessively high temperature and leakage may cause concrete to crack or deform, while too low temperature and humidity may cause drying shrinkage cracks on the concrete surface. Therefore, appropriate moisturizing and heat preservation measures need to be taken according to specific maintenance conditions and requirements. 2. Avoid excessive exposure time: During the setting curing period, the exposure time of surface mixing should be minimized, and the exposed surface of the concrete should be tightly covered in a timely manner to prevent surface moisture from evaporating. Before the concrete of the exposed surface protective layer is initially set, the covering should be rolled up, and the surface should be rubbed with a trowel at least twice to make it flat and then covered again. At this time, care should be taken that the covering should not directly contact the concrete surface until the concrete is finally set. 3. Increase the thickness of the protective layer appropriately: In order to increase the wear resistance and durability of concrete, the thickness of the protective layer can be appropriately increased. When pouring concrete, you can lay a layer of plastic film or wet cloth on the surface to keep the concrete surface moist and smooth. During the maintenance period, the thickness of the protective layer should be checked regularly to ensure that it meets the design requirements. 4. Control the construction temperature: During the concrete construction process, the construction temperature should be controlled to avoid excessively high or low temperatures affecting the quality of the concrete. During summer construction, measures should be taken to reduce the temperature of concrete entering the mold to avoid the phenomenon of "thermal bridge"; during construction in winter, measures should be taken to increase the temperature of concrete entering the mold to avoid the phenomenon of "cold bridge". 5. Regular inspection and maintenance: During the concrete curing period, the concrete structure should be inspected and maintained regularly to ensure its quality and safety. If cracks, deformation or other problems are found in the concrete structure, timely measures should be taken to repair and reinforce it. In short, concrete curing is a key link to ensure the quality of concrete. It is necessary to pay attention to maintaining appropriate humidity and temperature, avoiding excessive exposure time, appropriately increasing the thickness of the protective layer, controlling construction temperature, and regular inspection and maintenance. Only in this way can we ensure that the strength and durability of the concrete structure meet the design requirements and provide a strong guarantee for the safety and quality of the construction project.

The time required to smooth concrete depends on several factors, including the strength of the concrete, the power and model of the smoothing machine, the construction environment and the skill level of the construction worker. Therefore, it is impossible to give an exact time answer. However, as a general rule of thumb, smoothing concrete may take some time. Normally, within a period of time after the concrete is poured, you need to wait for the concrete to reach a certain strength before finishing. This is because trimming too early can cause damage to the concrete, affecting its strength and stability. The specific smoothing time depends on the strength growth of the concrete. Typically, finishing work can be done about a week after the concrete is poured. During this time, the concrete will gradually gain strength and be able to withstand the pressure and friction of the smoother. Trimmers usually take some time to adapt to different construction environments and concrete surface conditions. Therefore, before you start trimming, you need to do some preparation work, such as adjusting the parameters of the trimming machine, selecting a suitable spatula, etc. These preparations may take some time. In addition, the trimming process also takes a certain amount of time. Normally, the trimming machine needs to perform trimming operations repeatedly to obtain the desired surface effect. This may take some time depending on the condition of the concrete surface and construction requirements. It should be noted that the time for concrete polishing is also affected by other factors, such as the skill level of the construction personnel and the construction environment. Therefore, during the actual construction process, the trimming time needs to be determined according to specific conditions. In short, the time required for compacting soil and smoothing depends on many factors, and it is impossible to give an exact time answer. In the actual construction process, the trimming time needs to be determined according to specific conditions.

The selection and use of concrete trowel is an important link in concrete construction. Correct selection and use can improve construction efficiency and quality. Here’s how to properly select and use a concrete trowel. ◆1◆ Choose the right model When choosing a concrete trowel, you need to choose the appropriate model based on construction needs and site conditions. Different models of trowel machines have different parameters such as power, speed, size, etc., and are suitable for different construction occasions and needs. Therefore, when choosing, you need to understand the characteristics and application range of various models in order to choose the trowel that best suits you. ◆2◆ Check equipment quality When purchasing a concrete trowel, you need to check the quality of the equipment. It can be checked from the following aspects: 1. Appearance quality: Observe whether the appearance of the trowel is smooth and smooth, and whether there are obvious defects and damage. 2. Manufacturing quality: Check whether the manufacturing process of the equipment is fine, whether the parts are precise, and whether the installation is firm. 3. Electrical performance: Check whether the electrical performance of the equipment is stable, such as whether the power cord is aged, whether the leakage protector is sensitive, etc. 4. Safety performance: Check whether the safety performance of the equipment is reliable, such as whether the operating handle is firm and whether the braking system is effective, etc. ◆3◆ Understand the operating requirements Before using a concrete trowel, you need to understand the operating requirements. Specifically including the following aspects 1. Pre-operation inspection: Before use, you need to check whether the various functions of the equipment are normal, such as whether the power cord is firmly connected and whether the bearings are lubricated. 2. Operating posture: Correct operating posture can ensure the efficiency and safety of stinging. You need to maintain your balance and avoid excessive bending or overstretching. 3. Operation sequence: Carry out construction according to the correct operation sequence, such as adjusting the angle and depth of the trowel first, and then starting the equipment for construction. 4. Precautions: Safety precautions need to be paid attention to during the construction process, such as avoiding excessive force and use in humid environments. ◆4◆ Care and maintenance The care and maintenance of concrete trowels is of great significance to extending the service life of the equipment and improving construction efficiency. Here are some care and maintenance suggestions: 1. Regular cleaning: Clean the spatula and body regularly to keep the equipment clean and tidy. This helps extend equipment life and improve construction efficiency. 2. Check the bearings: Check the lubrication of the bearings regularly, add lubricating oil or replace the bearings in time. This helps ensure device stability and reliability. 3. Replace wearing parts: Check and replace wearing parts regularly, such as spatulas and belts. This helps ensure proper operation and longevity of the equipment. 4. Maintain the electrical system: Regularly check the circuits and components of the electrical system to ensure they are working properly. If there is damage or aging, it should be replaced or repaired in time. ◆5◆ Precautions for safe use When using a concrete trowel, you need to pay attention to safety matters. Here are some suggestions: 1. Inspection before use: Before use, check whether the equipment is intact, such as whether the spatula is sharp and whether the braking system is normal, etc. If there is any damage or problem, it should be repaired or replaced in time. 2. Wear protective equipment: Appropriate protective equipment should be worn during the construction process, such as gloves, goggles, etc. This helps protect the body from injury. 3. Avoid excessive force: Avoid excessive force during use to avoid equipment damage or personal injury. Force should be used rationally based on equipment performance and construction requirements. 4. Pay attention to environmental safety: During use, you should pay attention to the safety of the surrounding environment and avoid using the equipment in unstable or dangerous environments. At the same time, you should pay attention to weather conditions and avoid using equipment in bad weather. 5. Regular maintenance: Regular maintenance of equipment is an important measure to ensure the normal operation and service life of the equipment. During use, you should regularly check whether all functions of the equipment are normal, and repair or replace damaged parts in a timely manner.

The concrete trowel is a piece of equipment widely used in the field of concrete construction. In order to ensure its long-term stable operation and increase its service life, regular maintenance and upkeep is essential. This article will introduce in detail the care and maintenance methods of concrete trowels, including regular inspection of equipment, cleaning and maintenance of equipment, adjusting equipment parameters, and maintaining equipment safety. 1. Regular inspection of equipment 1.1 Check each component of the equipment Before using the concrete trowel, all its components must be inspected, including the motor, reducer, trowel plate, grinding wheel, etc. Check whether these parts are loose, damaged or worn. If there are any abnormalities, repair or replace them in time. 1.2 Replace worn parts During long-term use, various parts of the concrete trowel will be subject to wear and tear. When some parts are found to be severely worn or damaged, they should be replaced in time to avoid greater damage to the equipment. 2. Cleaning and maintaining equipment 2.1 Clean the surface of the equipment Clean the concrete trowel surface regularly to remove dust, dirt and other impurities. Use a soft cloth or brush to gently wipe the surface of the device and avoid using sharp objects to scratch the surface of the device. 2.2 Clean the inside of the equipment After cleaning the surface of the device, the inside of the device should be opened for cleaning. Use a vacuum cleaner or brush to remove dust and debris from inside to make sure the inside of the device is clean and tidy. At the same time, check whether the internal components are loose or damaged. If there are any abnormalities, repair or replace them in time. 3. Adjust equipment parameters 3.1 Adjust the trowel speed During the construction process, the speed of the trowel should be adjusted according to different concrete strengths and textures. Excessively high rotational speed may cause scratches or damage to the surface of the compacted soil, while too low rotational speed may affect construction efficiency. Therefore, you should pay close attention to the rotation speed of the equipment during use and make adjustments according to the actual situation. 3.2 Adjust the trowel pressure The pressure of the trowel is also one of the important factors affecting the construction effect. Excessive pressure may cause indentations or damage to the concrete surface, while too little pressure may affect the construction effect. Therefore, the pressure of the equipment should be paid close attention to during use and adjusted according to the actual situation. At the same time, when adjusting the pressure, care should be taken not to exceed the maximum bearing capacity of the equipment to avoid damage to the equipment. 4. Maintain equipment safety 4.1 Check equipment safety devices Before using a concrete trowel, its safety devices must be inspected. Including whether the braking system, protective devices, limiters, etc. are intact and effective. If any abnormality or damage to the safety device is found, it should be repaired or replaced in time to ensure the safety of construction workers. 4.2 Comply with safe operating procedures When using a concrete trowel, safe operating procedures must be followed. Operators should wear protective glasses, gloves and other personal protective equipment to avoid accidental injuries caused by improper operation. At the same time, attention should be paid to the safety of the surrounding environment during the construction process to avoid accidents caused by improper construction operations. 5. Summary Through regular inspection, cleaning and maintenance of the concrete trowel, as well as adjusting equipment parameters and maintaining equipment safety, the long-term stable operation of the equipment can be ensured and the service life can be improved. At the same time, operators should also pay attention to observing safe operating procedures and paying attention to the use of personal protective equipment to ensure the safety and smooth progress of the construction process.

The application prospects and development trends of concrete laser leveling machines in the future are very broad. The following are some considerations and application prospects regarding new materials, new processes, new technologies, etc.: 1. Application of new materials: With the continuous development of science and technology, new concrete materials continue to emerge. For example, new concrete materials such as high-strength concrete, self-healing concrete, and conductive concrete will bring new opportunities and challenges to the application of concrete laser levelings. High-strength concrete has the characteristics of high density, high strength and durability, and can be used in high-rise buildings, bridges and other structures, which puts forward higher requirements for the accuracy and stability of laser leveling machines. Self-healing concrete has the ability to repair itself, which can reduce problems such as concrete cracks and damage to a certain extent. It will also have a positive impact on the construction quality and efficiency of laser leveling machines. Conductive concrete is a concrete material that can conduct electricity. Conductive components can be added to the concrete or carbon fiber reinforced plastics can be used to enhance the conductive properties. The intelligent and automated control of laser leveling machines will bring new application prospects. 2. Application of new technologies: With the continuous development of the construction industry, new concrete construction technologies are also emerging. For example, 3D printing concrete technology is a new concrete construction technology that can use three-dimensional model data to print concrete components with various shapes and structures. This technology will bring new challenges and opportunities to the application of laser leveling machines, and can be combined with 3D printing technology to achieve more efficient, precise and personalized construction. In addition, concrete laser leveling machines can also be combined with other new technologies, such as 3D scanning technology, ultrasonic detection technology, etc., to achieve more efficient, precise and reliable construction. 3. Application of new technologies: With the continuous development of science and technology, new laser technologies are also emerging. For example, new lasers such as ultrafast lasers, solid-state lasers, and fiber lasers have the advantages of higher precision, wider wavelength range, and higher pulse energy, and can provide better, more efficient, and more reliable light sources for concrete laser levelings. . In addition, with the continuous development of artificial intelligence, Internet of Things, cloud computing and other technologies, concrete laser levelings can also combine these new technologies to achieve more intelligent, automated and networked control and management. In summary, the future application prospects and development trends of concrete laser leveling machines are very broad. In the future, with the continuous emergence and application of new materials, new processes, and new technologies, concrete laser levelings will become more efficient, precise, reliable, and intelligent, providing more reliable construction guarantees for the development of the construction industry. . At the same time, it is also necessary to strengthen investment in technology research and development and talent training to improve the overall level and competitiveness of domestic concrete laser leveling machines to meet the needs of future development of the construction industry.

Concrete laser leveling machine is a kind of equipment used for concrete construction. Its working principle mainly involves laser technology and automatic control technology. The following is the working principle of concrete laser leveling machine 1. The laser transmitter emits a laser beam, which is projected onto the concrete surface. 2. The laser receiver receives the laser beam and detects the distance between the concrete surface and the laser beam. 3. After receiving the signal, the controller adjusts the horizontal movement mechanism and height adjustment mechanism of the leveler according to the received signal, so that the concrete surface and the laser beam are kept at a certain distance. 4. By constantly adjusting the position and height of the leveler, the concrete surface reaches the preset flatness requirements. Through this working principle, the concrete laser leveler can quickly and accurately complete the leveling work of the concrete surface, improving construction efficiency and quality.

Concrete laser levelings improve flatness by: 1. Utilize laser technology to ensure the flatness and thickness of the concrete surface by precisely controlling the position and height of the laser beam. 2. Automated control technology can realize continuous and automatic leveling operations and improve work efficiency. 3. When performing automatic leveling, there is an accurate reference plane. Generally, when the main focus is to control the height, the tightrope method is suitable; when the main focus is to control the thickness, the floating datum beam method is adopted. Generally, tightrope is used for the bottom layer, and the floating datum beam method is used for the middle layer and surface layer. 4. The leveling machine has a vibration function, which can effectively compact the concrete materials evenly to the required thickness, further improving the flatness. 5. Leveling machines are usually equipped with high-precision sensors and controllers that can monitor and adjust the flatness and height of the concrete surface in real time. Therefore, through the above methods, the concrete laser leveling can effectively improve the flatness of the concrete surface, thereby improving the quality of stinging.

To deal with the construction challenges of concrete laser leveling machines under special ground conditions, the following measures can be taken: 1. Strengthen technical training: Ensure that operators are familiar with machine performance and can operate accurately, especially when facing different ground conditions, they should be able to flexibly adjust machine parameters 2. Choose the appropriate construction method: Choose the appropriate construction method according to the ground conditions. For example, for soft soil ground, preloading method or filling method can be used; for hard ground, crushing method or milling method can be used 3. Strengthen on-site management: Ensure the construction site is orderly and avoid cross-operation and chaos. At the same time, strengthen material management to ensure the quality and supply of concrete and other materials 4. Use auxiliary equipment: As needed, auxiliary equipment such as vibrators and polishers can be equipped to improve the leveling quality and efficiency. 5. Regular maintenance and upkeep: Ensure the normal operation of the machine by regularly inspecting and maintaining key components, such as laser transmitters, sensors, etc. 6. Strengthen communication and collaboration: Maintain close communication with all parties such as design and construction, solve problems encountered during construction in a timely manner, and ensure smooth progress of construction. 7. Use intelligent technology: Consider using automation and intelligent technology, such as machine vision, intelligent control, etc., to improve construction efficiency and accuracy. 8. Pay attention to safety: During the construction process, you should always pay attention to safety and take necessary safety measures to ensure the safety of personnel and equipment. In short, dealing with the construction challenges of concrete laser leveling machines under special ground conditions requires comprehensive consideration of technology, management, collaboration and other aspects. By strengthening training, selecting appropriate construction methods, strengthening on-site management, using auxiliary equipment, regular maintenance and upkeep, strengthening communication and collaboration, adopting intelligent technology, and paying attention to safety, we can effectively deal with these challenges and improve construction efficiency and project quality.

1. Main technical content Large-area floor laser leveling machine application technology is an emerging concrete floor construction technology. It uses laser leveling machine as the main equipment, coupled with slurry lifter, automatic polishing machine and manual auxiliary leveling and polishing. The method of leveling and polishing the concrete surface has begun to be widely used in various large-area super-flat floor construction in my country. This technology uses precision laser technology, closed-loop control technology and a highly precise hydraulic system to achieve level control under automatic computer control. Relying on the hydraulically driven leveling head, combined with the laser system and the computer control system, the leveling work is completed while automatically leveling. The computer control system automatically adjusts the elevation 5 times/s in real time to achieve flatness control, and exerts the vibrating function while leveling. The leveling head of the laser leveling machine is equipped with an integrated scraper, vibrator and leveling beam. The vibration frequency of the vibrator reaches 3000 times/min. It integrates leveling and vibrating work and completes it in one go. Greatly improve the uniformity and compactness of concrete and enhance the surface hardness of concrete. Achieve technical quality requirements and project progress requirements that traditional construction methods cannot achieve. 2.Technical indicators The laser leveling machine is mainly composed of two parts: the leveling head and the body. The leveling head is responsible for leveling concrete projects and consists of scrapers, vibrators, leveling beams, laser receivers, cloth spirals and other components. At the same time, it is also equipped with laser transmitters, receivers and other accessories. 3. Analysis of economic and environmental effects (1) One-time molding. The traditional leveling process requires secondary operations on the concrete project, and some parts need to be reworked. However, the laser leveling machine can achieve one-time molding, integrating multiple processes such as mixing, leveling, vibrating, and vibrating into one machine. Complete, improving efficiency and eliminating the need for patching operations. Suitable for dry hard concrete, fiber concrete and large aggregate concrete, the concrete density can be increased by more than 20%. (2) Mechanized construction reduces labor requirements. The application technology of large-area floor laser leveling machines adopts mechanized operations to reduce work intensity and improve work efficiency. The leveling construction efficiency is 4-5 times that of traditional leveling operations. (3) High leveling accuracy. The application technology of large-area floor laser leveling machine achieves excellent floor construction in one go (ground level ≤15mm, 3m inspection with ruler, flatness allowable deviation 3mm, flatness allowable deviation within the overlap range of 1.5m ≤3mm), exceeding The flat floor has a pure color and a good look and feel. Improve the company's construction level and market competitiveness in the field of large-area floor construction. Achieve good social benefits. 4. Scope of application (1) Floors of electronics, microelectronics, communication products, computer production industries, and large precision instrument factories that require a high degree of cleanliness, beauty, dust-free, sterility, and anti-static. (2) Warehouse, workshop, and garage floors are required to be wear-resistant, heavy-pressure resistant, impact-resistant, and chemical-resistant. (3) Suitable for large-area factories, warehouses, logistics centers, airports, buildings and floors with high flatness requirements.

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.

Thanks to the rapid development and prosperity of the flooring industry, laser leveling machines are increasingly used in floor construction. However, because the laser leveling machine industry is still an emerging industry, many people are not familiar with laser leveling. The leveling principle of the floor laser leveling machine is still in a vague state. Today, I will give you a detailed answer based on the principle of the floor laser leveling machine. First of all, we need to clarify what a laser leveling is. A laser leveling is a machine and equipment that is guided by a laser and used to level and level concrete. It can also be understood this way: when constructing large-area concrete floors, a laser leveling machine is used to vibrate, level and control the ground elevation of newly poured concrete. Let's explain in detail the working principle of the laser leveling machine leveling system. The principle of concrete laser leveling: the laser transmitter produces a rotating laser, and the laser receiver on the leveling machine receives the signal, which is analyzed by the laser measurement and control system. The deviation will be fed back to the sensitive computer control system on the leveling machine. The right electric The push rod will adjust the height of the scraper to ensure leveling accuracy. Paving, scraping, vibrating, and leveling floor concrete, mainly spreading the concrete to an elevation greater than the design requirements, and vibrating and leveling the concrete. The traditional method is: use mortar to punch the pier, find the elevation, lay out the support side formwork, transport alkali with a dump truck, perform preliminary leveling manually, use a flat plate to level the concrete, vibrate the concrete with a vibrator, and then use a special double-row steel pipe to vibrate. The concrete laser leveling machine uses a scraper to take away the elevated concrete and initially scrape it, compact it, and level it back and forth. to the design required elevation. It adopts a two-wheel automatic walking system with a vibration frequency of 3000 times/minute, which drives the entire vibrating plate to vibrate the concrete together. The construction width of the concrete laser leveling is 3 meters. The leveling of the laser leveling machine does not require a control line or a support side template to control the ground elevation. Instead, it is controlled by the laser measurement and control system on the leveling machine. As long as the laser transmitter is not disturbed, no matter where the leveling machine moves, This can ensure that the overall elevation of the paved ground is not affected. The use of laser leveling machines can reduce high-intensity labor by about 60%, save about 50% of construction costs, shorten the construction period by about 50%, and increase the strength and compactness of the floor by about 25%.

Concrete laser levelings improve flatness by: 1. Utilize laser technology to ensure the flatness and thickness of the concrete surface by precisely controlling the position and height of the laser beam. 2. Automated control technology can realize continuous and automatic leveling operations and improve work efficiency. 3. When performing automatic leveling, there is an accurate reference plane. Generally, when the main focus is to control the height, the tightrope method is suitable; when the main focus is to control the thickness, the floating datum beam method is adopted. Generally, tightrope is used for the bottom layer, and floating datum beam method is used for the middle layer and surface layer. 4. The leveling machine has a vibration function, which can effectively compact the concrete material to the required thickness evenly, further improving the flatness. 5. Leveling machines are usually equipped with high-precision sensors and controllers that can monitor and adjust the flatness and height of the concrete surface in real time. Therefore, through the above methods, the concrete laser leveling can effectively improve the flatness of the concrete surface, thereby improving the quality of stinging.