What are the performance indicators of concrete laser leveling machine?

    The configuration of power trowel blades (commonly known as power trowel blades or power trowel discs) directly determines the final flatness, smoothness, strength and wear resistance of the concrete surface. Improper selection and use can lead to various surface defects. The following elaborates in detail on how the configuration of the power trowel machine blades affects the final surface effect of concrete. Shape: Usually wide and thick, with a relatively small number of blades (commonly 3 or 4), and the blades have a large inclination Angle (negative Angle) with the rotating plane. Main functions: Lifting slurry and leveling. Working mode Scraping effect: The larger negative Angle causes the front edge of the blade to "shovel" the concrete surface. It can effectively level the height difference between aggregates (stones), bring the wetter mortar from the lower layer to the surface, and form a "cement slurry layer". Compaction: Through rolling, the surface aggregates are pressed into the interior of the concrete, making the structure more compact. Influence on surface effect: The front side: It provides a relatively smooth base layer rich in cement slurry for subsequent fine plastering. If this step is not taken, direct fine power troweling may bring out the aggregates, resulting in a rough and uneven surface. Negative: If it is used too late (the concrete is too hard), it will loosen the surface, causing cracks or wavy patterns. If used for too long, it will carry out excessive moisture and slurry, resulting in a fragile surface. Shape: Usually thin and narrow, with a large number of blades (commonly 8 to 12), and the Angle between the blades and the rotating plane is small, even close to horizontal (positive Angle or zero Angle). Main functions: Compaction, sealing and polishing. Working mode Patting and smoothing: Numerous and narrow blades pat and smooth the surface of the cement slurry at high speed and frequency to eliminate the marks left by rough smoothing. Sealing the surface: Compact the fine particles in the cement slurry, force the air out, seal the surface capillary pores, and form a dense, pore-free hardened layer. Generating luster: When the concrete is close to final setting, the high-speed rotating precision power trowel rubbing against the surface generates heat, causing the surface of the slurry to "melt" and present a luster. Influence on surface effect: Front: Achieve a dense, smooth, wear-resistant and dust-free surface. The level of glossiness is also determined at this stage. Negative: If used too early, the blade may get stuck in the concrete, creating wavy patterns or even damaging the surface. If used too late, the surface cannot be effectively sealed, which will cause powdering and sanding on the surface. Configuration factors The influence on the surface effect of concrete Applicable scenarios and suggestions Blade Angle This is the most crucial configuration parameter. Rough scraping stage: Use a negative Angle (with the front edge of the blade facing down) to achieve the effect of scraping and lifting the slurry. Fine smoothing stage: Use a small positive Angle or zero Angle (the blade is nearly horizontal) to achieve the effect of patting and smoothing. The larger the Angle, the stronger the cutting force, but the lower the surface finish. The smaller the Angle, the better the polishing effect. Number of blades The more the quantity, the more times each rotation is tapped, and the smoother the smoothing effect will be. Coarse power trowel (3-4 pieces) : Focuses on efficiency and slurry lifting. Fine power trowel (8-12 pieces or more) : Focuses on achieving extremely high flatness and smoothness. The more pieces there are, the finer the final surface will be. Blade material Wear resistance and toughness directly affect lifespan and performance. Spring steel: The most commonly used, it has good toughness, is not easy to break, and offers high cost performance. Tungsten carbide/hard alloy: Extremely wear-resistant, used for treating super-hard concrete or renovating old floors, with an extremely long service life, but expensive. The newness or oldness of the blade Blades that are severely worn cannot function effectively. Old/worn blades: Low efficiency in slurry lifting and polishing can lead to uneven surfaces and poor smoothness. Regular inspection and replacement are necessary. New blade: It can provide the best design Angle and cutting force to ensure the polishing effect. No matter how good the blade is, if it is used wrongly, the opportunity will be wasted. The blade and operation must be switched according to the setting condition of the concrete (the person standing on it should not sink more than 3mm). Phase One: Rough power troweling (Slurry lifting and leveling Timing: After the concrete has initially set, when it sinks by about 5 to 10mm when stepped on. Configuration: Install a coarse power trowel (negative Angle). Operation: The machine runs at a relatively slow speed and mainly focuses on leveling and large-angle scraping. Press the aggregates down and lift the cement slurry up to eliminate the obvious unevenness. Phase Two: Fine Smoothing (Pressing and smoothing) Timing: After the rough plastering is completed, when the concrete further hardens and sinks by about 1-3mm when stepped on. Configuration: Replace with a fine spatula (zero degree or small positive Angle). Operation: The machine speed can be increased and the smoothing can be carried out in a cross direction. At this point, it should be clearly visible that the surface gradually becomes fine and dense, and the rough knife marks are eliminated. Phase Three: Polishing (achieving a bright finish) Timing: When the concrete is close to final setting and there is almost no subsidence when stepped on. Configuration: Continue to use the fine spatula, but you can increase the Angle to a smaller positive Angle (if the blade head is adjustable). Operation: Run at high speed and "drift light" at a small Angle to the ground. The heat generated by friction will slightly liquefy the surface slurry, creating a mirror-like luster. Surface powdering and sanding Reason: The fine power troweling was done too late, and the surface could no longer be effectively compacted and sealed. Or the number of fine power trowel blades is insufficient or the Angle is inappropriate, resulting in poor polishing effect. The surface has wavy patterns and is uneven. Reason: The rough application was done too late, and it was caused by hard scraping and pulling. Or the blade angles are inconsistent (with different degrees of wear); The machine's walking speed is uneven. Exposed aggregates, rough surface The reason is that the coarse coating was skipped or not done thoroughly, and the fine coating was started before a thick enough layer of cement slurry was formed, which brought out the aggregates. Cracks on the surface: Reason: Using a coarse power trowel when the concrete was still too soft (bleeding period) damaged the surface structure. Or the polishing was done too early, causing the blade to sink and the material to be pushed and cracked. The configuration of a power trowel blade is a systematic project that involves using the "right tool" at the "right time" in the "right way". The rough power trowel is the foundation, responsible for creating a smooth and cement-rich working surface. The fine power trowel is the key, responsible for creating a dense, smooth and wear-resistant final surface. The Angle of the blade is the soul, directly determining whether the machine is a "scraper" or a "polishing machine". The timing of construction is the lifeblood. No matter how perfect the configuration is, it cannot play its role if the window period is missed. Only by mastering the relationship among the three proficiently can consistently produce high-quality concrete surfaces.   Note: The parameters provided in this document are for reference only and are not mandatory. Due to differences in technical characteristics between different brands and models of laser levelers, please consult the manufacturer for a suitable solution before actual operation. This reference document assumes no responsibility for any issues arising from failure to follow the manufacturer's instructions.    

◆◆1◆◆          Introduction Concrete pavement leveling is an important task in road construction, which directly affects the smoothness, compressive strength and other properties of the pavement. The traditional concrete pavement leveling method has some problems, such as low construction efficiency and insufficient flatness. In order to solve these problems, this article will introduce a new concrete pavement leveling method and its techniques. Introduction to the new method The new method uses an advanced leveling machine with high-precision sensors and control systems to quickly level the road surface before the concrete is initially tightened. Compared with traditional methods, the new method can better control the smoothness and drainage performance of the road surface and increase the service life of the road surface. ◆◆2◆◆          Advantages of the new method 1. High flatness: The new method uses high-precision sensors and control systems to better control the flatness of the road surface and reduce unevenness. 2. Rapid construction: The new method has higher construction efficiency, can shorten the construction period and reduce the impact on traffic. 3. Wear resistance and pressure resistance: The new method can better withstand the rolling and friction of vehicles and improve the wear resistance and pressure resistance of the road surface. 4. Environmental protection and energy saving: The new method uses advanced leveling machinery to reduce manual operations and energy consumption. and emissions, more environmentally friendly and energy-saving. ◆◆3◆◆          Implementation steps of the new method 1. Concrete pouring: Before concrete pouring, the formwork should be cleaned and moistened to ensure that the formwork is clean and free of water. Then mix and transport the concrete according to the design requirements. 2. Paving and vibrating: Spread the concrete evenly on the formwork, and use appropriate vibrating equipment to vibrate to ensure uniform density of the concrete. 3. Leveling machinery construction: Before the initial setting of concrete, use leveling machinery for construction. The leveling machinery should be driven at a constant speed to avoid sudden acceleration or deceleration that may affect the construction quality. At the same time, the sensors and control systems should be adjusted according to the actual situation to ensure that the smoothness and drainage performance of the road surface meet the requirements. 4. Surface treatment: After the leveling machinery construction is completed, the surface treatment of the road surface should be carried out. Smoothing, calendering, etc. can be used to make the road surface smoother and flatter. At the same time, attention should be paid to controlling the water-cement ratio and cement dosage to reduce cracks and color difference on the concrete surface. 5. Maintenance and protection: After the pavement construction is completed, maintenance and protection should be carried out in accordance with the design requirements. Moisturizing and maintenance can be carried out by covering with film, sprinkling water, etc. At the same time, heavy objects should be avoided from crushing and rubbing the road surface. During the maintenance period, debris and dirt on the road surface should be cleaned in time to keep the road surface clean and beautiful. 6. Quality inspection: After the construction is completed, the smoothness, compressive strength and other properties of the road surface should be inspected. If there are any problems, they should be rectified promptly. At the same time, the road surface should be inspected and maintained regularly to ensure that the quality and safety performance of the road surface meet the requirements. ◆◆4◆◆          Conclusion This article introduces a new concrete pavement leveling method and its techniques. This method uses advanced leveling machinery and has the advantages of high flatness, fast construction, wear and pressure resistance, environmental protection and energy saving. Through reasonable construction inspections and quality inspections, we can ensure that the quality and safety performance of the pavement meet the requirements and extend the service life of the pavement. This method is suitable for various types of concrete pavement construction and has broad application prospects. If you still have questions or want to know more, please continue to ask questions or consult a professional.

  In recent years, with the continuous development of the economy and society, the construction demand of large areas such as parking lots, large squares, industrial plants is also increasing, because these sites mainly use concrete to pour the foundation, and then cover the floor tile or floor paint, so higher requirements are put forward for the flatness of the base layer. In order to ensure that the ground flatness after construction reaches an ideal level, it is necessary to use a concrete laser levelling machine. So, what is the difference between the construction of concrete laser levelling machine and manual construction? What are the significant construction advantages of the concrete laser leveling machine itself? █  Traditional construction method The common concrete floor construction method is to manually level, and then use a polishing machine to wipe. This method requires a lot of labor, the quality of the construction process is not controlled, the need for manual correction many times, repeated measurement and adjustment of the ground under construction, and the efficiency is not high. A large area of concrete floor construction needs to use a large number of wood or metal plates to form the side formwork in advance, and measure the height of the side formwork by the level to control the height of the concrete after laying. Due to the need to use the level for multi-point measurement, the side template must be retested after laying to ensure accuracy. Therefore, the process is prone to human error. In addition, the removal of the side template also requires a lot of labor. █  Intelligent construction method   1. Operation principle The Topcon laser transmitter is set up in advance on the construction site to provide the reference surface of the working elevation. The Topcon receiver LS-B110 fixed on the laser leveler receives the laser elevation position signal and transmits the real-time elevation position signal to the controller, which automatically controls the electric push rod or hydraulic system of the concrete laser leveler. Ensure that the receiver's elevation is at the same level as the reference plane, and the leveling machine mechanism can be spread according to the set height.   2. Construction advantages The advantages of using concrete laser leveling machine for concrete leveling are highlighted in the following aspects: (1) It is easy to lay high-strength concrete, low-slump concrete and fiber mud condensate; (2) The construction quality is high, the leveling quality of the laser leveling machine is more than 3 times higher than that of the traditional manual construction method, and the ground is super flat; (3) Improve work efficiency and save about labor. The use of concrete laser levelling machine construction, shorten the construction time, improve work efficiency, and can save labor; (4) The heavy manual labor is changed into mechanical paving, vibrating, leveling, pulp lifting, and plastering, so that the operator is reduced, and the labor intensity is reduced to create high-quality ground; (5) The application of concrete laser levelling machine, not only than the traditional manual process to save costs, and less ground joint, later maintenance costs are greatly reduced, so that the economic benefits are significantly improved; (6) The use of concrete laser levelling machine can achieve large area construction, reduce a large number of construction joints, concrete collapse can be reduced, concrete strength is guaranteed, so that the ground integrity is good, not easy to crack. Summary of this chapter: Although the concrete laser levelling machine is an emerging new equipment with excellent technology in recent years, it is widely used in airport runways, high-speed rail platforms, large workshop pavements and other projects with high requirements for ground smoothness. If it can be widely popularized and promoted, it will bring very considerable construction benefits.