How to improve the construction quality of concrete laser leveling machine?

Tell you how effective the concrete laser leveling machine is! Many consumers are still hesitating whether they should buy a concrete laser leveling machine, because they have no concept of the construction effect of the equipment. Today we will introduce the use effect of the equipment. First of all, the biggest feature of this equipment is that it is fast, and the time-consuming is 1/10 of manual work, which is enough to make many construction teams excited; secondly, it is flat, and the ground level error after paving is small , is almost negligible. 1. Requirements for concrete and formwork ① Concrete:  Concrete must be produced, conveyed or pumped to the flooring site by a commercial concrete production plant. ② Concrete specifications: C25~C30 concrete, the strength of which is not less than 25MPa in 28 days, according to the design requirements. ③ Water-cement ratio: N o more than 0.5, no water can be added during the feeding process. ④ Cement: Use ordinary Portland cement with a grade of not less than 42.5. ⑤ Aggregate: Well-graded aggregate should be used. Crushed granite or pebbles are used as coarse aggregate, and the maximum diameter is not more than 25mm. The fine aggregate is clean river sand with a fineness modulus of 2.4-2.7. ⑥ Concrete mix ratio: The amount of cement is not less than 350Kg/m3. In order to avoid surface quality problems, the sand rate should be controlled at 35% to 40%. ⑦ Concrete slump: 14±2cm, maximum 16cm. ⑧ Setting time: The initial setting time should be controlled within 3-5 hours. In order to avoid the excessive deviation of the surface elevation affecting the joints, the formwork should be steel formwork. The height of the formwork should be controlled within +0 and -2mm, and the steel formwork should be within 1-1.2 meters from the surrounding walls. 2. Construction cooperation requirements ① The concrete feeding speed should be determined according to the ground thickness and pouring area to determine the minimum hourly feeding speed. For a floor with a thickness of 200 mm, if the width of one-time pouring reaches 40 meters, the minimum feeding speed should reach 40 cubic meters per hour, otherwise there will be cold joint problems, which will affect the quality of ground construction. ② Manually coordinate the concrete sent to the platform, and workers need to remove it as soon as possible and roughly level it. In addition, the areas around the formwork, walls, columns, trenches, equipment foundations, floor drains or around pipelines that cannot be leveled require manual cooperation for local leveling. Generally, 3-4 workers are required to cooperate with the construction (provided by Party A). ③ Other precautions In order to ensure the flatness of the ground, attention should be paid to: 1) The slump of concrete sent to the platform must be consistent each time. 2) Ensure that the concrete feeding 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. 4) Environmental cooperation. The concrete floor that has just been constructed cannot be exposed to sunlight, wind, rain, etc. that are unfavorable to concrete health. ④ Other requirements: A. In order to avoid random cracks in the floor, the cutting time of shrinkage joints should be carried out as early as possible (within 24 hours). B. At the same time as the construction of the laser leveling machine, there should be no electric welding machines on site, and no reflective objects (such as glass windows). C. The foundation must reach a certain hardness to ensure that the laser leveling machine does not collapse when working on the ground. D. The height of the ground in the factory building shall be calibrated by Party A, and the points must be evenly distributed, and there must be no error in the levelness. E. Pouring concrete must be operated according to the requirements of Party B's technicians.

    The effects of steel fibers and synthetic fibers on laser leveling construction and the performance of the ground surface layer are respectively focused on. Steel fibers, with their high strength and high modulus, can significantly enhance the structural bearing capacity and impact resistance of the ground, but they may have certain requirements for the surface effect and construction equipment; synthetic fibers (especially macroscopic synthetic fibers) perform well in controlling early plastic cracking and improving ductility, and are corrosion-resistant, but have a lower modulus of elasticity. In order to more clearly contrast the core differences between the two, I have compiled the following table: Comparison dimension Steel fiber Synthetic fibers The influence on the laser leveling construction operation It has a significant impact on the mixture and workability: The concrete appears drier and requires adjustments to the mix ratio (such as increasing the amount of cement or using water reducers) to ensure construction performance. Better workability: Has a smaller impact on the fluidity of concrete, making it easier to pump and spread. It causes severe wear on machinery: It causes more severe wear on mixers and laser leveling machines. More friendly to equipment: Causes less wear on construction equipment, and the machine operation is smoother. The influence on the performance of the ground surface layer (mechanical properties) Excellent tensile, shear and impact resistance: It can significantly improve the toughness of concrete, effectively transfer and withstand high loads, and prevent crack propagation. Improves toughness and post-crack bearing capacity: Can provide three-dimensional constraints after the concrete cracks, absorbing energy and preventing crack expansion. High elastic modulus: It has good coordination with the concrete matrix and can effectively prevent long-term creep of the concrete. Lower elastic modulus: Approximately 1/10 to 1/40 of that of steel fibers, and its contribution to structural stiffness is less than that of steel fibers under high loads. The influence on the performance of the ground surface layer (crack resistance and durability) Excellent crack resistance: It effectively limits micro-cracks in concrete caused by temperature and shrinkage. Excellent effect in controlling early plastic shrinkage and cracking: Especially suitable for suppressing early cracks within 12 hours after concrete pouring. Corrosion risk exists: Rust stains on the surface may affect the appearance, but usually do not cause the concrete to peel off. Fully corrosion-resistant: Stable performance in acidic and alkaline environments, no need for protective layer. Malleability: According to a study, at a specific dosage, the wear rate of steel fiber concrete may be higher than that of synthetic fiber concrete. Fire resistance: Microscopic synthetic fibers (such as polypropylene microfibers) have a low melting point and can form channels at high temperatures to release steam pressure, effectively preventing concrete from cracking. The influence on the final surface effect and post-processing May affect surface appearance: The surface treatment method is limited and is not suitable for creating decorative effects such as pattern embossing or exposed aggregate. If the fibers are exposed, it may cause harm to the human body or the waterproof layer. Compatible with various surface treatments: It is applicable to almost all surface treatment methods, including embossing, sandblasting, polishing, etc. No pressure during cutting: All sawing equipment can be used normally for steel fiber concrete. Cleaner surface effect: There is no risk of exposed metal fibers, resulting in a better appearance. The key factor in choosing which type of fiber to use depends on your ground application and performance requirements: Super heavy industrial workshops, warehouses, and aprons: They need to withstand huge dynamic loads and impacts, and have extremely high requirements for the structural bearing capacity of the ground. At this time, steel fibers are a more reliable choice. Large commercial floors, underground garages, and floors requiring good surface decoration: The main contradiction is to control early cracking, and there are requirements for surface appearance and corrosion resistance. Then, synthetic fibers (especially macro synthetic fibers) are a more economical and efficient choice. High-rise buildings or tunnels with special fire protection requirements: The risk of concrete cracking under high temperatures must be considered. At this time, fine polypropylene synthetic fibers must be added. In actual engineering projects, there are also many projects that choose to use a combination of the two (for example, using steel fibers to ensure structural strength and using fine synthetic fibers to control early plastic cracking) to complement each other and achieve the best performance and cost balance.   What scenarios does your project mainly apply to? If you can provide more information about the ground design load or requirements for crack resistance, I can help you do a more specific analysis.  Contact us NOW   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.    

    The long-term storage of the power trowel machine during the off-season of construction or during project intervals (usually referring to more than one month) is of vital importance. Proper storage and maintenance can greatly prevent equipment from rusting, aging and being damaged, ensuring that its performance remains as good as new when it is used again and extending its service life. The following is the standard "seven-step method" for the long-term storage of a power trowel. Please be sure to follow the sequence. This is the foundation of all steps and must never be stored with cement slurry on the machine. High-pressure flushing: Use a high-pressure water gun or a large amount of clean water to thoroughly rinse all parts of the machine body, blades, chassis, walking wheels, etc., and remove all cement, mortar, and mud lumps. Pay special attention to cleaning the connection area of the blade, the lifting screw and the area around the bearing sealing ring. Detail cleaning: Use tools such as scrapers and wire brushes to remove stubborn lumps. Comprehensive inspection: During the cleaning process, check whether the blades are worn or deformed, whether the screws and nuts are loose, whether the machine body is cracked, and whether the cables/oil pipes are damaged. Record the problems to facilitate subsequent maintenance. Move the machine to a well-ventilated, dry and rain-free indoor storage point. Dry/blow dry all surface moisture with a dry cloth or compressed air, especially: Exposed metal parts (lifting screw, adjusting rod). Blade. Engine surface. All oil injectors and gaps. Make sure that the inside and outside of the machine are completely dry, with no signs of dampness at all. Drain the old grease and add new grease: Use a grease gun to inject an adequate amount of new grease into all grease nozzles (spindle of the cutter head, bearings of the traveling wheels, steering mechanism, etc.) until all the old grease that may contain water is completely squeezed out. This can expel moisture and form a protective film inside. Apply anti-rust oil to key areas: Apply a layer of anti-rust oil or grease to all exposed metal surfaces prone to rust (non-friction contact surfaces). Key points include: Lifting screw and thread: Thickly coated with grease. Blade: Apply a thin layer of anti-rust oil to both sides (wipe it off before reuse). Chassis metal frame. Exposed bolts and nuts. Engine maintenance (for gasoline/diesel engines) : Change the engine oil: Drain the old oil when the engine is hot and add new oil to the specified mark. Fuel system treatment (crucial!)" : Option A (Recommended) : Completely drain the fuel from the fuel tank. Then start the engine and let it shut down naturally to deplete the residual fuel in the carburetor or fuel lines. Option B: If it is impossible to empty the fuel tank, fill it up with fuel and add fuel stabilizer. Then run the engine for 5 to 10 minutes to allow the stabilizer to circulate throughout the fuel line. This can prevent the fuel from gelatinizing and clogging the carburetor and fuel injector. Spark plug/fuel injector: Remove the spark plug, inject a small amount (about 10-15ml) of engine oil into the cylinder, manually and slowly pull the start rope several times to coat the cylinder wall with the engine oil, and then reinstall the spark plug (without connecting the high-voltage wire). Disconnect the battery: If the machine has power to start the battery, the negative cable should be disconnected. Remove the battery, store it in a cool and dry place, and perform a charge maintenance every 1 to 2 months. Protect the circuit: Wrap the exposed circuit joints with waterproof tape. Air filter: Remove the air filter, clean or replace it. Stuff a clean cloth into the air intake to prevent dust from entering. Tire: Lift the machine up to lift the tire off the ground to prevent the tread from being deformed and aged due to long-term single-point pressure. If it cannot be lifted, make sure the tire pressure is sufficient and move the position regularly. Blade: The blade can be removed. After cleaning, apply anti-rust oil separately and store it. Or at least ensure that rust prevention measures have been taken on the machine. Ideal environment: In a dry, cool and well-ventilated warehouse or shed. Avoid outdoor storage. Stay away from corrosion: Keep away from fertilizers, chemicals and damp ground. Stable placement: Place the machine on a flat ground and level it with wooden blocks if necessary. Cover: Use a breathable dust cover (such as a canvas cover) to cover the entire machine. It is strictly prohibited to directly wrap with completely impermeable plastic sheeting, otherwise water vapor will condense inside, causing severe rust. Marking: Hang a label that reads "Maintained and ready for storage" in a prominent position, and indicate the storage date and the date when the next inspection is required. Storage period: Every 1-2 months, check the machine for any abnormalities (such as tire pressure, the integrity of the covering, and whether there is any rat damage or wire biting), and recharge the battery. Before reactivation (very important!)" : Remove the coverings and check the overall condition. Check whether the grease in all parts has hardened and replenish or replace it if necessary. Reinstall the battery (if it has been removed) and connect it firmly. Remove the blockage at the air intake and reinstall the air filter. Wipe off the excess anti-rust oil from the key friction areas (such as the contact surface between the blade and the ground). Check the fuel and engine oil according to the normal start-up procedure, and then start the machine. First, run it at low speed without load for a few minutes to allow all components to lubricate and circulate. Only after there are no abnormal sounds can it be put into construction. Cleanliness is the prerequisite: no cement residue. Drying is fundamental: eliminate moisture. Lubrication and rust prevention are key: putting on a "protective suit" for metals. The fuel system needs to be properly handled: to prevent clogging. It's better to store off the ground: protect the tires. Regular inspections are indispensable: dynamic management. By following the above methods, your power trowel machine can quickly regain its "combat effectiveness" even after being idle for several months, effectively avoiding problems such as difficult startup, component jamming, and rust damage, truly achieving "always on standby, reliable and durable".   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.