Selection and Installation Key Points of Formwork Systems in Super Flat Floor Construction

    To ensure effective control of concrete mix ratio during construction, it is necessary to start from the whole process of raw material management, mix design, mixing production, construction pouring and quality inspection, and achieve the goal through standardized operation and refined management. The following are specific measures:   Cement: Check the brand, strength grade, stability, setting time and other indicators, send for inspection by batch, and strictly prohibit the use of expired or damp cement. Aggregate (sand, stone): Focus on controlling grading, mud content, mud block content, and needle-like particle content. For example, the mud content of fine aggregate (sand) must be ≤3% (C30-C55 concrete), and the needle-like particle content of coarse aggregate (crushed stone) must be ≤15%. Admixture: Check the type (such as water reducer, retarder), dosage adaptability, and provide a factory inspection report and retest qualification certificate to avoid the impact of admixture quality fluctuations on mix performance. Mixing water: Use drinking water or non-drinking water that has passed the test to ensure that there is no pollution such as oil, acidic and alkaline substances. – Aggregates of different specifications are stored in separate warehouses and obvious signs are set up to avoid mixing; sand and stone yards need to be hardened and drainage facilities are set up to prevent rainwater from eroding and causing grading changes. – Cement and admixtures need to be stored in warehouses, moisture-proof and rain-proof, and used according to the "first in, first out" principle to avoid long-term storage and failure.   – The professional laboratory will design the mix ratio according to the project requirements (such as strength grade, impermeability, durability), raw material characteristics and construction conditions (such as pumping height, pouring temperature). – At least 3 groups of trial mixes are carried out to adjust parameters such as water-cement ratio and sand ratio to ensure that the workability (slump, cohesion), setting time and strength of the concrete mixture meet the standards. – The mix ratio must be approved by the project technical person in charge and the supervision unit before use. – Before construction, conduct technical briefings to the mixing station and construction team to clarify key parameters such as the amount of each material, mixing time, and slump control range.   – The mixing station metering system (such as electronic scales) needs to be calibrated regularly (at least once a month), and zero-point calibration is performed before opening to ensure that the measurement error meets the standard: – Cement, admixture: ±1%; – Aggregate: ±2%; – Water: ±1%. Feeding sequence: Usually the "secondary feeding method" is used (first feed aggregate, cement, and mineral admixtures, dry mix for 30 seconds, then add water and admixtures, and then mix for 90-120 seconds) to improve the homogeneity of concrete. Mixing time: Controlled according to the mixer type, the forced mixer should be no less than 60 seconds to ensure that all materials are mixed evenly. Real-time monitoring of slump: At least 2 tests per shift. If the slump does not meet the requirements (such as the design requirement of 180±20mm), the water consumption or admixture dosage needs to be adjusted. It is strictly forbidden to add water at will.   – Use a mixer truck for transportation. The transportation time should not exceed 1 hour (shortened in summer) to prevent excessive initial setting or slump loss of concrete. – Keep the tank body rotating at a low speed (2-4 rpm) during transportation to avoid segregation; rotate at a high speed for 20-30 seconds before unloading to make the mixture uniform. – Check the concrete strength grade, impermeability grade and other labels. It is strictly forbidden to mix concrete with different mix ratios. – Test the slump again. If the slump does not meet the standard due to long transportation time, the water reducer of the original mix ratio can be added for adjustment (the dosage needs to be determined by test). It is strictly forbidden to add water directly. – When casting in layers, the thickness of each layer shall not exceed 500mm (pumping concrete), and the vibration time shall be controlled within 20-30 seconds to avoid segregation or honeycomb surface caused by over-vibration or missed vibration. – Avoid casting at noon in high temperature season (temperature>30℃), and take insulation measures in low temperature season (temperature<5℃) to prevent the performance of concrete from being affected by temperature.   – For every 100 trays (not exceeding 100m³) of concrete with the same mix ratio, make at least one set of standard curing specimens (cubes with a side length of 150mm) to test the 28-day strength; at the same time, make specimens under the same conditions to evaluate the demolding or tensioning strength. – For concrete with anti-seepage requirements, make one group of anti-seepage test pieces (6 pieces/group) for every 500m³. – Establish a statistical analysis account for concrete strength, compare the design value with the measured value, and if the standard deviation of strength for three consecutive groups exceeds the allowable value of the specification, the mix ratio needs to be re-optimized. – Adjust the construction mix ratio in time according to the fluctuation of raw materials (such as changes in sand moisture content). For example, for every 1% increase in sand moisture content, it is necessary to reduce the amount of water and increase the amount of sand accordingly to keep the water-cement ratio unchanged.   – Provide professional training for mixing station operators and construction teams to master the key points of mix ratio control, equipment operating procedures and emergency treatment measures (such as slump abnormality adjustment methods). – Regularly organize technical briefing meetings to convey specification updates or design change requirements. – Establish a "three-inspection system" (self-inspection, mutual inspection, and special inspection), clarify the person responsible for each process (such as the station manager, tester, and construction team leader), and sign and confirm the implementation of the mix ratio. – Accountability for illegal operations (such as adding water without authorization and not feeding materials according to the metering) is included in performance appraisal.   – Introduce an intelligent mixing station management system to monitor metering data, mixing time, slump and other parameters in real time, and automatically alarm and lock the equipment when abnormal. – Use BIM technology to simulate the concrete pouring process, optimize the construction sequence, and reduce the risk of mix ratio failure caused by process problems. Through the above measures, the full-cycle closed-loop management of concrete mix ratio from "design-production-construction-testing" can be achieved to ensure that the concrete performance meets the design requirements and ensure the safety and durability of the engineering structure.     Click the below to jump immediately!!! ARMOUR JOINT LASER LEVELING MACHINE LIGHT TOWER POWER TROWEL SLIPFORM MACHINE STEEL FIBER TOPPING SPREADER TRACKED MINI DUMPER  

When operating a concrete laser leveling, avoiding concrete splashing is an important safety measure to ensure the safety of workers and the efficient operation of the equipment. Here are specific methods and suggestions for avoiding concrete splashing when operating a concrete laser leveling: 1. Suitable concrete mix ratio and consistency The mix and consistency of concrete play a key role in avoiding concrete splashing. Operators should work closely with the concrete supplier to ensure that the concrete mix and consistency are suitable for the laser leveling's operating requirements. Proper consistency reduces the fluidity of the concrete during the leveling process, thereby reducing the potential for splashing. 2. Control pouring speed and distribution uniformity When pouring concrete, operators should control the pouring speed to avoid being too fast or too slow. Too fast a pouring rate can cause concrete to spatter during the leveling process. At the same time, the fabric should be even to avoid accumulation or shortage. Operators can achieve uniform distribution by adjusting the speed of the conveying equipment and the distribution method. 3. Reasonably adjust the operating parameters of the laser leveler The operating parameters of the laser leveling also have an important impact on concrete spatter. The operator should reasonably adjust the scraper height, vibration frequency, driving speed and other parameters of the leveler according to the consistency of the concrete and the working environment. With proper adjustment, the vibration and impact of the concrete during leveling can be reduced, thereby reducing the possibility of splashing. 4. Maintain appropriate working distance and angle When operating the laser leveler, the operator should maintain an appropriate working distance and angle. Too close a distance or too steep an angle can cause concrete to spatter during the leveling process. The operator should reasonably adjust the working distance and angle according to the consistency of the concrete and the performance of the leveling to ensure that the leveling can operate smoothly and evenly. 5. Regular inspection and maintenance of equipment Proper operation of equipment is critical to avoid concrete splashing. Operators should regularly inspect and maintain the laser leveling machine to ensure that all parts of the equipment are in good working order. Particularly easy-to-wear parts such as flat plates, vibrators and tracks should be replaced or repaired in time to maintain the normal operation and leveling effect of the equipment. 6. Improve operational skills and safety awareness Operator skill and safety awareness are equally important to avoid concrete splash. Operators should receive professional training and education to improve their operating skills and safety awareness. During the operation, operators should concentrate, abide by operating procedures and safety requirements, and avoid blind operations or illegal operations. 7. Take necessary protective measures When operating a laser leveling, operators can take some necessary protective measures to reduce the risk of concrete splashing. For example, wear personal protective equipment such as protective glasses, masks, and gloves to reduce damage to the body from splashes. In addition, baffles or fences can be set up around the work area to prevent splashes from spreading to the surrounding environment. 8. Pay attention to the working environment and weather conditions The working environment and weather conditions will also have an impact on concrete splashing. Operators should pay close attention to changes in the working environment and avoid working under unfavorable conditions such as high temperature, strong winds or moisture. Under high temperature conditions, concrete is prone to drying and hardening, which may Increased risk of splashing; in windy conditions, the wind may blow the concrete surface, causing splashing; in wet conditions, the concrete surface may slide, causing the leveling to become unstable, thereby increasing the possibility of splashing. 9. Clean and maintain the work area in a timely manner Cleaning and maintenance of the working area is equally important to avoid concrete splashing. Before operation, the operator should clean up debris and accumulated water in the working area to ensure that the working surface is flat and dry. After the operation is completed, the concrete surface should be maintained in time. and protection from surface cracking or breakage. Maintenance measures can include watering, covering with moisturizing materials, etc. to keep the concrete surface moist and stable. Summarize: Avoiding concrete splash is an important task when operating a concrete laser leveling. By controlling the mix ratio and consistency of concrete, adjusting the pouring speed and distribution uniformity, reasonably adjusting the operating parameters of the laser leveling, maintaining appropriate operating distances and angles, regularly inspecting and maintaining equipment, improving operating skills and safety awareness, and taking necessary measures Protective measures, paying attention to the working environment and weather conditions, and timely cleaning and maintenance of the working area can effectively reduce the risk of concrete splashing. Operators should comprehensively consider these factors and ensure that safety regulations and operating procedures are strictly followed during operation to ensure safe and efficient operations. At the same time, continuous learning and summarizing experience, improving operating skills and safety awareness are also the keys to avoiding concrete splashing.

The concrete laser leveling machine to achieve high-precision ground leveling mainly relies on the following technologies and methods: 1. Laser technology: Concrete laser leveling machines use laser technology for high-precision positioning and measurement. By installing a laser transmitter and receiver on the equipment, the leveling can form a laser beam in the construction area, and the height and level of the laser beam can be monitored and controlled in real time through sensors and control systems. This technology can achieve high-precision automatic positioning and ensure the accuracy of the leveling machine's walking trajectory and height adjustment. 2. Precise hydraulic system: The concrete laser leveling machine is equipped with a precise hydraulic system, which enables fine flow control and height adjustment. The hydraulic system can accurately control the movement of the leveling head based on data fed back by the laser positioning system, thereby achieving high-precision ground leveling. 3. Automatic control system: The concrete laser leveler adopts an advanced automatic control system, which can automatically adjust the operating status of the leveler based on preset parameters and real-time feedback data. The control system can monitor the position, height and concrete paving thickness of the leveling machine in real time, and automatically adjust the movement trajectory and speed of the leveling head to ensure that the flatness of the ground meets the design requirements. 4. High-precision scraper and vibrator: The concrete laser leveling machine is equipped with high-precision scraper and vibrator, which can achieve precise concrete leveling. The scraper can accurately control the movement trajectory and height of the scraper based on the feedback data from the laser positioning system, making the concrete surface smoother. The vibrator can vibrate the concrete to improve the compactness and smoothness of the ground. 5. Repeated leveling multiple times: In order to ensure that the flatness of the ground meets high-precision requirements, the concrete laser leveling machine can perform multiple repeated leveling in the same area. This method further improves the flatness of the floor by eliminating any slight height differences that may have existed after initial leveling. 6. Operator experience: Although concrete laser leveling machines have a high degree of automation and precise control capabilities, operator experience is still very important to achieve high-precision ground leveling. Operators should have rich construction experience and skills, be familiar with different construction conditions and requirements, and be able to make necessary adjustments and treatments according to the actual situation to ensure the best leveling effect. 7. Equipment maintenance and calibration: In order to maintain the high-precision performance of the concrete laser leveling, regular maintenance and calibration of the equipment are also essential. Equipment should be inspected and cleaned regularly to ensure that all parts are in good working order. At the same time, the positioning system, hydraulic system and other key parameters of the equipment should be calibrated regularly to ensure that the measurement and control accuracy of the equipment meets the requirements. 8. Construction technology optimization: In addition to the technical advantages of the equipment itself, reasonable construction technology is also a key factor in achieving high-precision ground leveling. The construction unit should formulate a scientific construction plan based on the actual situation, including the selection of concrete materials, the design of the mix ratio, and the arrangement of the construction sequence. By optimizing the construction process, the quality of ground flatness can be further improved. In summary, the realization of high-precision ground leveling by a concrete laser leveling relies on the comprehensive application of a variety of technologies and methods. Through laser technology, precise hydraulic systems, automatic control systems, high-precision scrapers and vibrators, multiple repeated leveling and operator experience, regular maintenance and calibration of equipment, and optimization of the T-laying process, it can be significantly improved. The flatness of the ground meets the requirements of high-precision construction. At the same time, construction units should continue to explore new technologies and methods to further improve the quality and efficiency of ground flatness.