Compaction Degree of Sub-base in Superflat Floors and Its Impact on Final Flatness

– Prevent entrapment: When the metal trowel is rotating at high speed, the operator should be careful to avoid clothing, hair, fingers, etc. from getting close to the rotating trowel. Wear work clothes, tie the cuffs and hems tightly, and wear a safety helmet and protective gloves. For example, before starting the trowel, be sure to carefully check the surrounding environment to ensure that there are no debris that may be involved. – Prevent fragments from splashing: If the metal trowel is cracked or broken, the fragments may splash and injure people. Therefore, check the integrity of the trowel regularly. If there are signs of cracks or damage, stop using it and replace it immediately. At the same time, during use, maintain an appropriate safety distance and avoid standing in the direction where you may be hit by fragments. – Proper installation: When installing the metal trowel, ensure that it is firmly installed. According to the instruction manual of the trowel, use appropriate tools to install the trowel on the corresponding shaft and tighten the screws. Insecure installation may cause the trowel to loosen or fall off during operation, which will not only affect work efficiency but also cause safety accidents. – Control operating parameters: – Speed ​​control: Operate strictly according to the rated speed of the trowel machine, and do not increase the speed at will. Too high a speed will increase the centrifugal force of the trowel blade, which may cause the trowel blade to deform and damage, and will also increase wear. For example, for most concrete trowel operations, the trowel blade speed is generally controlled at around 70-150 revolutions per minute. – Pressure control: Reasonably control the pressure of the trowel blade on the ground. If the pressure is too high, the friction between the trowel blade and the ground will be too large, which may easily cause the trowel blade to wear too quickly, and may also cause scratches or unevenness on the ground. Generally, the pressure is adjusted according to the hardness of the ground and the trowel stage (rough grinding or fine grinding). The pressure should be appropriately reduced in the fine grinding stage. – Avoid idling and excessive friction: Try to reduce the idling time of the trowel blade. When idling, the trowel blade does not contact the ground for effective operation, but its own rotation will cause wear. At the same time, during use, avoid direct friction between the trowel and hard objects such as metal, such as avoiding operation on metal structures without concrete and other ground materials to prevent damage to the trowel blade. – Timely cleaning: After each use, clean the concrete residue, dust and other debris on the trowel in time. If these debris are not cleaned in time, the friction between the trowel and the ground will increase the wear rate during the next use. You can use a brush or a high-pressure air gun to clean it. – Check the wear condition: Check the wear degree of the trowel regularly. Observe whether the edge of the trowel becomes blunt, has a gap or a large area of ​​wear. If the edge wear exceeds a certain limit (such as wear exceeding 2-3 mm), the trowel needs to be replaced. At the same time, check the flatness of the trowel. If deformation occurs, it should be replaced or repaired in time. – Prevent corrosion: If used in an environment with chemical substances (such as acid, alkali, etc.), the trowel should be cleaned in time to prevent chemical substances from corroding the metal trowel. In addition, when storing in a humid environment, anti-rust measures should be taken, such as applying anti-rust oil.

– Using laser leveling technology, the laser transmitter generates a precise and stable plane reference. The laser receiver is installed on the leveling machine to sense the deviation in real time, so that the leveling machine automatically adjusts the scraper height to ensure that the floor flatness error is extremely small, which can generally be controlled within ±1.5mm, and can meet the needs of high-end industrial plants, electronic chip manufacturing workshops and other places with strict requirements on flatness. – Optimize the concrete mix ratio, add appropriate amounts of expansion agents, fibers and other admixtures, reduce the shrinkage stress during the hardening process of concrete, and cooperate with the carefully designed construction process, so that the floor does not need to set expansion joints in a large area, which is not only beautiful but also reduces the later maintenance cost, and avoids the accumulation of dust and debris caused by cutting seams. – In the initial setting stage of concrete, wear-resistant materials such as corundum and metal aggregates are evenly spread, and a special trowel is used to closely combine with the floor to form a hard and wear-resistant surface layer. The wear resistance can be several times higher than that of ordinary concrete floors. It is suitable for places with frequent wear and tear such as heavy traffic areas, warehouses, and logistics centers. – From base treatment, concrete pouring, leveling to wear-resistant material spreading, troweling and finishing, the processes are closely connected and completed in one go, avoiding the problem of poor interlayer bonding caused by layered construction, improving the overall strength and durability of the floor, and reducing the construction period. It can usually shorten the construction period by 1/3 – 1/2 compared with traditional processes. Applicable to indoor and outdoor concrete floor projects with large areas and high requirements for flatness and wear resistance, such as various large industrial plants, logistics storage centers, airport terminals, exhibition halls, parking lots, etc., especially suitable for places where obvious expansion joints are not expected to affect the appearance or use function. – The laser transmitter emits a rotating laser beam to form a high-precision horizontal control surface. The laser receiver installed on the leveling machine continuously captures the laser signal, compares the actual elevation of the floor with the laser plane benchmark, and transmits the generated deviation signal to the control system. The control system drives the hydraulic actuator of the leveling machine to adjust the scraper, vibrator and other components in real time to accurately level and vibrate the concrete to achieve high-precision leveling. – On the one hand, by optimizing the concrete mix ratio, selecting low-hydration hot cement, adding an appropriate amount of expansion agent (such as calcium sulfoaluminate expansion agent) to compensate for concrete shrinkage, adding polypropylene fiber to enhance concrete toughness and inhibit the generation of microcracks; on the other hand, during the construction process, strictly control the concrete pouring temperature, vibration method and curing conditions, reasonably arrange the construction sequence, reduce the temperature difference between the inside and outside of the concrete and stress concentration, so that the floor itself has the ability to resist shrinkage and deformation, thereby meeting the requirements of no seam cutting. – The surface of concrete in the initial setting stage has a certain viscosity. At this time, the spread wear-resistant material can be embedded in the surface of the concrete. With the subsequent leveling and finishing operations, the wear-resistant material and the concrete form a solid whole. Wear-resistant materials such as corundum and metal aggregates have high hardness and strong wear resistance, forming a wear-resistant protective layer on the surface to protect the main concrete of the floor from wear. – Technical preparation: Familiar with the construction drawings and technical specifications, formulate detailed construction plans, and conduct technical briefings. – Site preparation: Clean up the site debris and accumulated water, level the base layer, and if the base layer is soft soil, it needs to be reinforced; set up a temporary drainage system for construction; plan the concrete pouring and leveling route according to the site area and shape. – Material preparation: Purchase high-quality cement, sand, gravel, admixtures, wear-resistant materials, etc. according to the design requirements, inspect the raw materials to ensure that they meet the quality standards; prepare sufficient construction water and electricity. – Equipment preparation: Debug concrete laser leveling machine, concrete mixing equipment, transportation equipment, wear-resistant material spreader, trowel, etc. to ensure the normal operation of the equipment; calibrate the laser system so that the laser plane it emits is consistent with the designed elevation of the floor. – Thoroughly clean the surface of the base to remove pollutants such as dust and oil; compact the base with a roller or tamping machine to achieve a compaction degree of more than 90%; repair and fill local low-lying areas and potholes with concrete or mortar to ensure that the flatness error of the base does not exceed ±10mm. – Accurately weigh the raw materials according to the designed mix ratio, use a forced mixer to mix the concrete, and the mixing time is not less than 90 seconds to ensure the uniformity of the concrete; transport the concrete to the construction area by pumping or unloading, control the pouring speed, avoid concrete segregation, and the pouring thickness is slightly higher than the designed floor elevation by 10-20mm to reserve space for leveling. – Start the laser leveling machine and make it move forward at a uniform speed of 1-2m/min; the operator adjusts the scraper height and vibration frequency of the leveling machine in real time according to the feedback signal of the laser receiver to ensure that the concrete surface is flat and compacted; the leveling work of adjacent areas should be completed before the initial setting of the concrete, and the overlapping construction width should not be less than 10cm to ensure the integrity of the floor. – When the concrete is initially set (generally there are slight footprints when stepping on it, and the sinking depth is about 3-5mm), use a special spreader to evenly spread the wear-resistant materials on the floor surface according to the specified amount, and the spreading thickness is generally 3-5mm; during the spreading process, pay attention to controlling the spreading speed and direction to avoid accumulation or leakage of wear-resistant materials, and ensure that the spreading uniformity reaches more than 90%. – After spreading the wear-resistant material, use a trowel to smooth it immediately. The trowel should run in a crisscross pattern to fully blend the wear-resistant material with the concrete. The number of smoothing passes should be no less than 3 times. As the concrete continues to harden, when there is no water stain on the surface and it feels slightly hard when pressed with fingers, it should be smoothed manually. Aluminum alloy rulers, trowels and other tools should be used to make the floor surface bright and smooth. – After smoothing and finishing, the floor should be maintained in time by covering with plastic film, spraying curing agent or laying water straw mats. The maintenance time should be no less than 7 days. During this period, the concrete surface should be kept moist to avoid water loss and cracks. Warning signs should be set up during the maintenance period to prohibit vehicles and pedestrians from passing on floors that do not meet the strength requirements. – Calibrate the laser system before construction to ensure the accuracy of the laser plane; regularly check the flatness with a 2m ruler and a feeler gauge during construction, at least once every 100-200 square meters, and adjust the leveler in time if deviation is found; use a laser flatness meter to fully test the flatness of the floor after finishing to ensure that it meets the design requirements. – Strictly select wear-resistant materials according to design requirements and check the quality certification documents of wear-resistant materials; supervise the spreading amount and uniformity during spreading to ensure that the specified requirements are met; after maintenance, on-site wear resistance tests can be carried out, such as grinding a certain area with a grinding wheel, observing the wear condition, and judging whether the wear resistance meets the standard. – Optimize the concrete mix ratio, control the cement dosage and water-cement ratio; monitor the concrete pouring temperature to avoid high-temperature pouring; strengthen maintenance and control the temperature difference between the inside and outside of the concrete; regularly inspect the floor, and if fine cracks are found, use epoxy resin and other materials to repair them in time. 1. Provide safety training to construction personnel to familiarize them with the operation methods and safety precautions of construction equipment, such as the safety operating procedures of laser levelers, concrete mixers and other equipment. 2. Set up obvious safety warning signs at the construction site to divide the construction area and non-construction area to prevent unrelated personnel from entering the construction danger zone. 3. Regularly check the safety performance of construction equipment, such as electrical insulation, mechanical protection devices, etc., to ensure the normal operation of the equipment and avoid safety accidents caused by equipment failure. 4. Provide construction personnel with necessary personal protective equipment, such as safety helmets, safety shoes, gloves, etc., to ensure the personal safety of construction personnel. 1. Classify and collect solid waste such as concrete residues and discarded wear-resistant material packaging bags generated during the construction process, and transport them to designated garbage disposal sites regularly. 2. Reasonably arrange construction time to avoid high-noise concrete mixing, equipment operation and other operations during residents' rest time. If necessary, take noise reduction measures, such as installing silencers on equipment. 3. Control dust on the construction site, such as covering the material storage area, closing the transport vehicles, regularly sprinkling water to reduce dust, and keeping the construction site clean. – The one-time molding process shortens the construction period, reduces labor costs, equipment rental costs, etc.; no cutting reduces the later maintenance costs, such as cutting, caulking material costs and labor maintenance costs; wear-resistant flooring increases the service life of the flooring, reduces the frequency of flooring replacement, and the overall economic benefits are significant.   – It provides high-quality flooring solutions for various large-scale projects, meeting the needs of rapid development of modern industry, logistics and other industries; it reduces noise, dust and other pollution during construction, which is conducive to environmental protection and sustainable development of urban construction. In a large electronic chip manufacturing plant construction project, this construction method was used to successfully create a high-precision, no-cutting, wear-resistant factory floor. The construction area reached 50,000 square meters, and the flatness error was controlled within ±1mm, meeting the stringent requirements of chip manufacturing equipment for floor flatness. In the subsequent years of use, the floor had good wear resistance and no obvious cracks appeared, providing a solid guarantee for the efficient production of the factory. For example, in a certain international logistics and warehousing center project, this construction method also performed well, and a large area of ​​floor was built quickly and efficiently. The seam-free design improved the aesthetics and practicality of the warehouse and was highly recognized by the owner.

    Scientific life cycle management and detailed replacement records of the vulnerable parts of the Concrete Laser Leveling are the keys to ensuring construction quality, reducing the total cost of equipment and avoiding unplanned shutdowns. The following provides you with a complete life cycle management and replacement record system for vulnerable parts, including management methods, record templates and practical operation suggestions. Life cycle management is not merely about "replacing when broken", but rather a comprehensive strategy that encompasses both preventive replacement and condition-based replacement. Name of vulnerable parts Life cycle (Reference Management strategy Key influencing factors Scraper 50,000-150,000 square meters Condition-based replacement Concrete corrosiveness, aggregate hardness, ground flatness requirements, and operating habits Hydraulic oil filter element 500 hours or one year Preventive replacement The cleanliness of the working environment, the quality of hydraulic oil, and the working time of the system Walking tires/track plates 1,000 to 2,000 hours Condition-based replacement Ground roughness, presence of sharp objects, and load conditions Laser receiver Depending on usage State check Collision, vibration, aging Engine filter element According to the engine manual Preventive replacement Environmental dust concentration, fuel/engine oil quality (Air filter, mechanical filter, diesel filter (Usually 250 to 500 hours Hydraulic oil 2,000 hours or 2 years Preventive replacement Working hours, oil temperature, and contamination conditions Strategy explanation Preventive replacement: Replace components based on running time or calendar time, regardless of whether they are damaged or not. It is applicable to hydraulic oil filter elements, engine filter elements, etc. Its failure will trigger a chain reaction (such as filter element blockage causing pump damage). Condition-based replacement: Whether to replace a component is determined based on its actual wear or performance condition. It is applicable to scrapers, tires, etc. The wear and tear is obvious. Replacing them too early will cause waste. ① Establish files: Create an independent "Wear Parts Life Cycle Management Card" for each piece of equipment. ② Data Recording: Strictly record the replacement time, square meters, reasons for replacement, etc. in the table below. ③ Regular inspection Daily inspection: Before starting work each day, the operator should check the wear of the scraper, the tire pressure and the wear condition. Weekly/Monthly inspection: The equipment administrator checks the appearance of the filter element and records the cumulative working time of the equipment. ④ Data analysis Regularly (such as every quarter) review the records and analyze the average lifespan of each vulnerable part. If the lifespan of a certain component is much lower than expected, the cause needs to be investigated (such as operational issues, material problems, environmental issues). ⑤ Optimization strategy: Based on the analysis results, adjust the preventive replacement cycle or increase the frequency of status checks to achieve the optimal balance between cost and efficiency. It is recommended to use paper forms for on-site record-keeping and summarize them into electronic forms for long-term analysis later. Equipment Number: ______ Equipment Model: ______ Person in Charge of Management: ______ Serial number Change date Name of vulnerable parts Specification and model Replacement reasons (wear/damage/prevention) Current device hours (h) Current leveled area (㎡) Supplier/Brand Replace the person Remarks 1 2023/10/26 Main scraper ABC-100 The edge wear exceeds 5mm 1250 58,500 XX brand A The area to be leveled this time starts from the previous 50,000 square meters 2 2023/11/15 Hydraulic oil filter element XYZ-01 Preventive replacement 1500 75,000 Original factory B Change the hydraulic oil at the same time 3 2024/3/10 Walking tire 8.5-24 The tread pattern is smoothed out 2100 110,000 YY brand C … … … … … … … … … … Instructions for Use Current equipment hours/leveled area: This is the most crucial indicator for measuring the life cycle and must be accurately recorded. Replacement reason: Clear record for easy distinction between normal wear and tear and accidental damage. Note: Record any abnormal conditions, related maintenance activities (such as whether the oil was changed when replacing the filter element), etc. Name of vulnerable parts Specification and model Applicable equipment Current inventory Safety stock Supplier Information Procurement Warning Main scraper ABC-100 Concrete Laser Leveling machine #01, #02 2 3 Contact person:… Telephone:… Triggered when inventory is less than or equal to safety stock Hydraulic oil filter element XYZ-01 Concrete Laser Leveling machine #01 5 4 Contact person:… Telephone:… Walking tire 8.5-24 Concrete Laser Leveling machine #01, #02 1 2 Contact person:… Telephone:… Warning … … … … … … … Inspection standard: When the blade of the scraper wears more than 3-5mm or irregular wear occurs that affects the scraping effect, it should be replaced immediately or flipped over for use (if the design permits). Best Practice Keep the scraper clean and remove the adhered concrete after each use. Prepare spare parts before the wear reaches the limit to avoid work stoppages due to lack of materials. Record the square meters completed by each scraper to calculate its true lifespan Replacement standard: Preventive replacement must be carried out strictly in accordance with the time or hours specified in the equipment manual. Under harsh working conditions, the replacement cycle should be shortened. Best Practice When replacing the filter element, change the hydraulic oil at the same time to ensure the cleanliness of the system. Before and after replacement, pay attention to cleaning the area around the filter element seat to prevent contaminants from entering the system. Use genuine or high-quality compatible filter elements. Inferior filter elements are the "killers" of hydraulic systems. For companies with multiple devices, it is advisable to consider upgrading to digital management Use equipment management software (such as CMMS) : Input the information of each device, maintenance plans, and replacement records into the system. Set up automatic reminders: The system can automatically send reminders to the administrator for preventive maintenance tasks such as filter element replacement and hydraulic oil replacement based on the operating hours or calendar time. Data analysis and Reporting: Easily generate equipment maintenance cost reports, wear and tear consumption analysis, etc., providing data support for management decisions. The core value of conducting meticulous life cycle management and record-keeping for the vulnerable parts of Concrete Laser Leveling machines lies in: Ensure construction quality: Worn scrapers will directly affect the flatness of the floor. Control maintenance costs: Avoid high repair fees caused by excessive maintenance and catastrophic damage. Enhance equipment availability: Minimize unexpected downtime through planned maintenance. Form a knowledge base: Long-term recorded data is a valuable asset for the company, which helps optimize procurement, training and equipment selection. Establishing and strictly implementing this system will shift your equipment management from "passive maintenance" to "active prevention", ultimately achieving cost reduction and efficiency improvement.   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.