Causes and preventive measures of cracks in emery wear-resistant floor

    Long-term storage of power trowel machines requires thorough preparation to prevent corrosion, fluid degradation, and damage to mechanical parts. These steps are crucial to ensure the machine starts up reliably and performs optimally when you need it next. Here are the most important considerations, broken down by category: Thorough cleaning is the foundational step, as concrete and dirt residue can trap moisture and accelerate corrosion. Remove All Concrete/Debris: Use a scraper, wire brush, and/or a pressure washer to completely remove all hardened concrete, mortar, and dirt from the blades, chassis, guard rings, and around the engine/gearbox. Crucial Note: Ensure the machine is completely dry after washing to prevent immediate rust formation. Engine/Motor Cleaning: Use low-pressure air or a brush to clear dust and debris from the heat sink, cylinder block, and any cooling fins. Clean any oil stains or grease from the exterior. Inspect and Repair: Before storing, check for and replace any worn-out or damaged parts like drive belts, clutch plates, spark plugs, or air filters Fluids can degrade and cause serious damage if left in the machine for an extended period. Drain Completely: Modern gasoline, especially with ethanol, can absorb water and corrode the fuel lines and carburetor. Completely drain all fuel from the tank. Run Until Stop: Set the fuel switch to "Off," start the engine, and let it run until it stops naturally. This clears residual fuel from the carburetor/fuel lines. Change Oil: Drain the old engine oil (ideally when the engine is warm) and replace it with new oil. New oil contains better anti-corrosion properties and lacks acidic contaminants from use. Internal Rust Prevention: For extreme long-term storage, remove the spark plug, drip a small amount of new engine oil (about one tablespoon) into the cylinder, and manually pull the starter rope a few times to coat the cylinder wall. Reinstall the spark plug. Hydraulic Systems (Ride-On Trowels): Check the hydraulic fluid quality and level. If replacing the fluid, circulate it briefly. Ensure all piston rods of the hydraulic cylinders are fully retracted to protect the chrome surface from exposure and rust. Protecting exposed metal and moving components is vital to prevent seizing. Trowel Blades: Remove the blades, clean them, and apply a layer of heavy grease or a dedicated anti-rust oil (like WD-40 or a specialized coating) to all metal surfaces. Consider wrapping them in oiled paper and storing them separately. Exposed Metal Surfaces: Spray a thin layer of anti-rust agent or a rust-preventative spray on all exposed metal surfaces, including the chassis, guard rings, and any areas where paint has been scratched off. Lubrication: Apply grease or oil to all designated lubrication points, including: Gearbox gears (if applicable) Clutch forks Height and tilt adjustment screws and their threaded parts If the machine has an electric start or motor, special attention is needed. Air Filter: Remove the air filter element for cleaning or replacement. Seal the air inlet with a clean cloth or plug to prevent dust and pests from entering the engine. Disassemble and Charge: Disconnect and remove the battery. Fully charge it. Store Separately: Store the battery in a cool, dry place off the concrete floor. Maintenance Charge: Recharge the battery periodically (e.g., once every 1-2 months) to maintain its charge and lifespan, or use a "smart" maintenance charger. The physical location where the machine is stored is the final defense against damage. Indoor and Dry: Store the power trowel indoors in a clean, dry, and well-ventilated area. Avoid storage outdoors or in areas with high humidity or extreme temperature fluctuations, which can cause condensation and rust. Off the Ground: Place the machine on a flat wooden pad, pallet, or trolley to lift it off the concrete floor, which can draw moisture. Protection: Cover the machine with a breathable, waterproof tarp or a specialized equipment cover. Avoid using plastic sheeting, as it can trap moisture and encourage rust or mildew. Pest Control: Ensure the storage area is free of rodents, as they can chew on wiring, hoses, and filters.   Would you like the specific steps for winterizing the engine, as that is the most common form of long-term storage?   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 construction floor construction industry is currently developing relatively fast, and with it, the use of construction machinery such as laser levelers is becoming more and more frequent. So, why must we recommend this kind of equipment for everyone among the many construction machinery? In fact, there are certain reasons. Next, let us take a look at the introduction of the following articles! Compared with traditional laser leveling machines, laser leveling machines have several advantages in building floor construction: 1. Reduce labor cost and double increase efficiency: There are many people involved in the construction of the traditional craft, which requires support formwork (channel steel), spotting, and paving. About 20 people are needed. The daily construction area is 700 square meters. The total number of people who use the concrete laser leveling machine is reduced by more than half compared with the traditional process. Can be operated by one person. The daily construction area is 2500-3500 square meters, which greatly reduces labor costs. 2. Laser alignment, high precision, low error: The traditional process of leveling requires support formwork to control the elevation of the ground and pull the control line. The elevation error is large. The levelness and flatness of the entire floor cannot be guaranteed. It adopts laser point-to-point emitter, which is suitable for large-scale one-time paving. There is a laser measurement and control system to control the elevation in real time. There is no need for pulling wires for leveling, and there is no need for side plates in the middle to control the elevation of the ground. In this way, the elevation error caused by the vibration of the formwork (channel steel) during the construction process is avoided, and the elevation error caused by traditional artificial block formwork is also reduced. 3. Better flatness and integrity: Traditional craft construction, one day of formwork and one day of watering, can only be skipped one by one for construction, which has great limitations, cannot be continuously operated, and the integrity is not good, which is easy to cause cumulative errors in construction joints. The laser leveling machine paves a large-area floor at one time, with higher efficiency and integrity. The completion of the entire floor makes the ground integrity better, which is completely impossible for traditional construction. 4. The ground is denser and more uniform: The 4000 times per minute high-frequency vibrator allows the leveling head vibrator to produce uniform high-frequency vibration, making the concrete floor more dense and uniform. As the leader in the design of concrete laser leveling machines, the laser leveling machines produced by our company can realize large-scale construction. By solving the concrete surface layer at one time, all the "common quality problems" caused by the secondary method are completely eliminated. We will continue to provide customers with reliable products and better services.

    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.