What construction scenarios are suitable for trowel blades of different designs?
December 16, 2024
What construction scenarios are suitable for trowel blades of different designs? 2
The trowel blade is a key component of the trowel machine, and its different designs will lead to different applicable scenarios
1. Circular trowel blade
– Features: The circular trowel blade is the most common design, which usually has multiple blades distributed in a circle around the central axis. This design enables the trowel blade to provide uniform pressure when rotating, and can effectively cover a large area during the troweling process. – Applicable scenarios: – Large area concrete plane: Such as large areas of concrete pouring ground such as industrial plants, large warehouses, and parking lots. In these scenarios, the circular trowel blade can quickly rough grind and level the ground and improve construction efficiency. For example, when building a large logistics warehouse, the ground area may reach thousands of square meters, and the circular trowel blade can perform preliminary troweling on the entire ground well. – Grounds with general flatness requirements: For some indoor and outdoor floors that do not require extremely high ground flatness, such as ordinary residential roads, simple outdoor activity venues, etc., the circular trowel blade can meet the basic troweling needs, making the ground surface smooth without obvious bumps or depressions.
2. Square trowel
– Features: The four corners of the square trowel can better fit the corners, edges and some irregularly shaped areas. Compared with the round trowel, it has a better trowel effect at the corners. – Applicable scenarios: – Floors with corners and edges: In places with many corners and edges such as the floor of the room and corridor inside the building, the square trowel can fit these areas more closely to ensure that the floor of the corners and edges can also get a good trowel effect. For example, when decorating hotel rooms, the square trowel can smooth the four corners of the room and the floor near the wall to avoid "dead corners" that are difficult to reach with the round trowel. – Irregularly shaped floors: If the shape of the floor is not a regular rectangle or circle, but a complex shape such as a polygon or curve, the square trowel can flexibly adjust the angle according to the shape of the floor to effectively smooth these irregular areas.
3. Perforated trowel
– Features: The perforated trowel is designed with many small holes, which are mainly used to discharge air and excess moisture from the concrete surface during the troweling process. It can make the floor more compact after troweling and reduce the generation of surface pores and bubbles. – Applicable scenarios: – Concrete surface with high quality requirements: In some scenarios with high requirements for concrete surface quality, such as high-precision laboratory floors, clean workshop floors in electronic factories, etc., the perforated trowel can effectively discharge air and moisture, so that the floor can achieve higher flatness and finish, meeting the strict requirements of these special places for floor quality. – Concrete construction in humid environments: When concrete construction is carried out in humid weather or in areas with high groundwater levels, water accumulation and bubbles are prone to occur on the concrete surface. The perforated trowel can discharge these excess moisture and air in time to ensure the quality of floor troweling.
4. Double-layer trowel
– Features: Double-layer trowels are composed of two layers of trowels of different sizes or shapes. The upper and lower trowels can cooperate with each other when rotating to achieve different degrees of trowel effects. Generally speaking, the diameter of the upper trowel will be slightly larger than that of the lower layer, or the blade angle of the upper trowel will be different from that of the lower layer. – Applicable scenarios: – Floors that require fine troweling: In scenes with extremely high requirements for floor finish, such as high-end shopping mall floors, high-end hotel lobby floors, etc., double-layer trowels can first use the lower trowel to perform preliminary large-area troweling and leveling, and then use the upper trowel to perform fine grinding to achieve a mirror-like smooth effect. – Concrete surfaces constructed in layers: For some concrete structures that are cast in layers, such as the concrete deck of a bridge, the concrete surface of a large hydraulic structure, etc., double-layer trowels can be used for different casting layers. First, the lower layer is coarse-grinded, and then the upper layer is finely ground to ensure the quality of the entire concrete surface.
About the Author: Shandong Vanse Machinery Technology Co., Ltd.
Shandong Vanse Machinery Technology Co., Ltd. is a high-tech manufacturer specializing in concrete construction machinery, including laser screeds and related equipment. The company integrates R&D, production, and global sales, with products exported to over 60 countries and widely used in infrastructure projects worldwide.
How to extend the service life of concrete laser leveling machine?
In the field of concrete construction, concrete laser leveling machine (concrete laser leveling machine or concrete laser leveler) has become a key equipment to improve construction efficiency and quality. With the vigorous development of the construction industry, the demand for high-precision, large-area concrete construction continues to grow, and the application of concrete laser leveling machine is becoming more and more extensive. According to a market research report, the global concrete laser leveling machine market size is expected to reach US$1.76 billion in 2025, with an annual growth rate of approximately 11.4%. During long-term high-intensity use, how to extend the service life of the concrete laser leveling machine has become the focus of many users. This is not only related to the return on equipment investment, but also affects the smooth progress and cost control of construction projects. After each operation with a concrete laser leveling machine, timely cleaning is essential. Since the equipment will be exposed to a large amount of concrete, mud and other impurities during operation, if it is not cleaned in time, these substances will adhere to the surface of the equipment and key components, accelerating component wear. For example, the body shell, leveling blade, vibrating device and other parts can be washed with a high-pressure water gun (but it should be noted that it is strictly forbidden to directly aim the water gun at the mesh part of the body to prevent water from entering the body and causing a short circuit) to remove the concrete residue and dust on the surface. For some stubborn stains that are difficult to wash off, use a soft cloth dipped in a neutral detergent dilution to wipe. Do not use strong alkali or strong acid cleaning agents to avoid corrosion of the paint and electroplating layer on the surface of the equipment, affecting the appearance and reducing the protective performance. Regularly check the connection and tightening of each component. During the operation of the equipment, the connecting bolts may become loose or even broken due to factors such as vibration and impact. For example, the connecting bolts of the frame, walking mechanism, laser transmitting and receiving device of the laser leveling machine should be carefully checked before and after each operation. If they are loose, tighten them in time. If the bolts are broken, they need to be replaced immediately. At the same time, check whether there is leakage in all parts of the equipment, including engine oil, coolant, hydraulic oil of the hydraulic system, etc. Once leakage is found, the cause should be promptly investigated and repaired to avoid problems such as poor lubrication and overheating of components due to oil leakage, which will affect the service life of the equipment. The timely replacement of wearing parts is the key to ensuring the continuous and stable operation of the equipment. For example, the leveling scraper, vibrator, tires (or rubber tracks) of the leveling machine will wear faster during frequent use. Generally speaking, the wearing parts should be checked after each use. If the wear exceeds the prescribed limit, they should be replaced immediately. Even if the wearing parts do not seem to be damaged during normal use, it is recommended to replace them every six months to ensure that the overall performance of the equipment is not affected. For example, a severely worn leveling scraper cannot effectively scrape the concrete, which will cause the ground flatness to decrease, and will also increase the workload of other parts of the equipment, accelerating the overall loss of the equipment. In a high temperature environment, the concrete laser leveling machine faces many challenges. The engine is prone to overheating, resulting in power reduction and increased wear of parts. Therefore, when constructing in high temperatures in summer, first ensure that the engine cooling system is working properly. Before daily operation, check the coolant level and add it in time if it is insufficient; regularly clean the dust and debris on the surface of the radiator to ensure that the heat dissipation duct is unobstructed. When the engine temperature is too high, you should choose a cool area to stop and cool down. Do not rush to add cooling water. You need to let the engine idle for a while and add it after the temperature drops slightly to prevent the engine cylinder from cracking due to excessive temperature difference. At the same time, high temperature will also affect the performance of the hydraulic system. Check the hydraulic oil temperature frequently. If the oil temperature is too high, stop the machine for a rest to avoid long-term operation of the equipment at high temperatures. For example, in some southern regions during summer construction, if you do not pay attention to the heat dissipation of the equipment, it may cause the hydraulic system seals to age faster and leak oil, which will seriously affect the normal use of the equipment. High humidity environment can easily cause the metal parts of the concrete laser leveling machine to rust and corrode, especially when constructing in coastal areas or rainy seasons. To cope with high humidity environments, the equipment should be parked in a dry place and avoid being placed in the open air. If it is unavoidable to operate in a humid environment, anti-rust oil can be applied to the surface of the equipment, especially to parts that are prone to rust, such as the frame and chassis. At the same time, the electrical circuit should be checked regularly to prevent short circuit failures caused by moisture. For the battery of the equipment, it is necessary to keep it clean and dry, check the electrolyte level and density regularly, and replenish distilled water in time to ensure good battery performance. For example, if the laser leveling machine used for a long time in a high humidity environment does not pay attention to anti-rust treatment, it may cause problems such as frame rust and strength reduction in a short period of time, affecting the safety and service life of the equipment. Concrete contains alkaline substances. If the protection is not appropriate during long-term contact, it will cause corrosion to the components of the concrete laser leveling machine. For parts that are in direct contact with concrete, such as leveling blades, vibrating devices, etc., they can be made of corrosion-resistant materials or undergo special surface treatment to improve their resistance to alkali corrosion. After each operation, clean the equipment thoroughly to remove residual concrete and prevent alkaline substances from adhering to the surface of the equipment for a long time. In a high-alkaline environment, attention should also be paid to the lubrication system of the equipment, and lubricating oils and greases with good alkali resistance should be selected and replaced regularly to ensure that all moving parts are well lubricated and reduce the occurrence of failures caused by corrosion and wear. For example, in the construction of some industrial plant floors, due to the strong alkalinity of concrete, if effective protective measures are not taken, the key components of the equipment may be severely corroded in a short period of time, shortening the service life of the equipment. Strictly operate in accordance with the rated working parameters of the concrete laser leveling machine to avoid operating in a condition that exceeds the equipment's bearing capacity. Overload operation will cause excessive pressure on the engine, hydraulic system, transmission components, etc., accelerate the wear of parts, and even cause equipment failure. For example, behaviors such as leveling thickness exceeding the maximum thickness specified by the equipment and forced operation on a site with a large slope will cause damage to the equipment. As an equipment manager, you should ensure that the operator is familiar with the equipment performance and operating procedures, and strictly prohibit illegal operations. Before construction, arrange construction tasks reasonably according to actual working conditions to ensure that the equipment operates stably within the normal load range. During the operation of the equipment, try to ensure smooth operation and avoid violent operations such as sudden acceleration, sudden braking and frequent steering. Sudden acceleration and sudden braking will cause the engine and transmission system to bear greater impact force instantly, which may easily cause damage to parts; frequent steering will aggravate the wear of tires (or tracks) and steering mechanisms. After starting the equipment, the engine should be allowed to idle for a period of time to allow all parts to be fully lubricated before operation. During the leveling operation, keep the equipment moving at a uniform speed to avoid speed fluctuations, which can not only ensure the construction quality but also reduce the wear of the equipment. For example, when driving a concrete laser leveler, smoothly controlling the throttle and steering wheel can effectively extend the service life of key parts of the equipment. The correct start and stop sequence also has an important impact on the service life of the concrete laser leveler. Before starting the equipment, check the environment around the equipment to ensure that there are no obstacles; check whether the liquid levels of fuel, engine oil, coolant, hydraulic oil, etc. are normal, and whether the indications of various instruments are normal. When starting, first turn the key to the power-on position, wait for the instrument self-check to complete, and then start the engine. After the engine is started, let it idle for a few minutes, observe the engine sound, vibration and whether the display of each instrument is normal, and then proceed to the next step after confirming that it is correct. When shutting down, first park the equipment on a flat and solid ground, lower the working device to the lowest position, and then turn off the engine. If the equipment is not used for a long time, the equipment should be sealed and maintained in accordance with the requirements of the equipment manual, such as draining fuel and coolant, lubricating and protecting key parts, etc. For example, the wrong starting method, such as forcibly starting the engine before the equipment completes the self-check, may damage the engine control system and affect the normal use of the equipment. The hydraulic system is an important part of the concrete laser leveling machine, and regular maintenance is essential. Hydraulic oil will be contaminated and its performance will deteriorate during use, so the hydraulic oil should be replaced regularly. Under normal circumstances, the hydraulic oil should be replaced every 1,000 working hours or so. The specific replacement cycle can be adjusted appropriately according to the equipment use environment and the oil quality monitoring results. When replacing the hydraulic oil, use a clean container to hold the oil. The hydraulic oil must be filtered through the oil filter before adding it to the hydraulic oil tank to ensure that the oil is clean. At the same time, clean the hydraulic oil radiator regularly to ensure good heat dissipation and prevent the hydraulic system from malfunctioning due to excessive oil temperature. In addition, the replacement cycle of the hydraulic oil filter should also be appropriately shortened, generally 750 hours is appropriate. When replacing a new filter, check carefully. It is strictly forbidden to use a deformed, contaminated or rusted filter. For example, at some construction sites, due to the harsh environment, the hydraulic oil is easily contaminated by dust and impurities. If the filter and hydraulic oil are not replaced in time, it may cause blockage, leakage and other faults in the hydraulic system, seriously affecting the normal operation of the equipment. Regularly check the electrical system of the concrete laser leveling machine to ensure that all electrical components are firmly connected and the circuits are not damaged or aged. Check the performance of the laser transmitting and receiving device to ensure that the laser signal is stable and accurate. Start the engine once every two months, charge the battery, and run all hydraulic actuators, such as rotary hydraulic motors, telescopic cylinders, etc., to prevent battery loss and rust and jamming of hydraulic system components. Do not remove the battery from the machine at will to avoid the loss of internal software program failures in the equipment control. At the same time, pay attention to check the grounding of the electrical system to ensure that the grounding is good to prevent safety accidents caused by leakage. For example, if the electrical line is aging and damaged, it may cause a short circuit, causing a fire, and endangering the safety of equipment and personnel. Perform a comprehensive performance test on the concrete laser leveling machine every once in a while (such as half a year or a year). The test content includes key performance indicators such as leveling accuracy, work efficiency, engine power, and hydraulic system pressure. Through testing, potential problems with the equipment can be discovered in time, and targeted repairs and adjustments can be made. For example, if the leveling accuracy is found to be reduced, it may be due to laser system failure, wear of the leveling blade, or looseness of the mechanical parts of the equipment. It is necessary to check and repair them one by one to ensure that the equipment always maintains a good working condition and extends its service life. Click the below to jump immediately!!! ARMOUR JOINT CONCRETE LASER LEVELING MACHINE LIGHT TOWER POWER TROWEL SLIPFORM MACHINE STEEL FIBER TOPPING SPREADER TRACKED MINI DUMPER
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What issues should be paid attention to during the construction of concrete pavement with large slump?
Control the pouring speed: Since the concrete has a large slump and good fluidity, the pouring speed should not be too fast to prevent the concrete from flowing and accumulating quickly in the formwork, resulting in loose vibration or segregation. Avoid excessive height difference: The free fall height of concrete should be controlled within 2m. If it exceeds this height, auxiliary tools such as string tubes and chutes should be used to prevent the concrete from segregating due to large drop and affecting the overall performance of the pavement. Reasonable selection of vibration equipment: It is advisable to use a low-frequency vibrator, and the vibration frequency is generally 2000-3000 times/minute. Avoid using a high-frequency vibrator to cause over-vibration of the concrete, which will cause the aggregate to sink, the cement slurry to float, and the stratification and segregation. Control vibration time: The vibration time should not be too long. The surface of the concrete no longer sinks significantly, bubbles no longer appear, and cement slurry appears on the surface. Generally, the vibration time at each point is controlled within 20-30 seconds. Timely surface finishing: Since the surface of concrete with large slump has more moisture, it is necessary to wait for the surface moisture to evaporate properly before finishing. Generally, it is 1-2 hours after the concrete pouring is completed. The specific time needs to be determined according to the site environment and the concrete setting conditions. Too early surface finishing will cause surface marks or unevenness, and too late will affect the surface finishing effect. Multiple surface finishing: Usually 2-3 surface finishings are required. The first surface finishing is carried out after the concrete surface is initially dehydrated, mainly for rough leveling; the second surface finishing is carried out before the initial setting of the concrete, further slurry lifting and smoothing; the third surface finishing is carried out before the final setting of the concrete, mainly to eliminate fine surface cracks and defects, making the road surface smoother and flatter. Timely covering: After the concrete surface is finished, it should be covered with plastic film, geotextile, etc. immediately to prevent the surface from drying out and cracking due to rapid evaporation of water. The covering should be tight to ensure that the concrete surface is always moist. Extended curing time: The strength of concrete with large slump increases relatively slowly. The curing time should be appropriately extended, generally not less than 14 days. During the curing period, water should be sprinkled regularly to keep the covering moist, so that the concrete can harden under suitable humidity conditions and improve the strength and durability of the road surface.
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