In addition to the angle, what other factors will affect the performance of the power trowel?

    The standard requirements for the flatness of concrete pavement vary depending on the type of project, usage function and other factors. Here are some common standards: General concrete pavement: According to the "Construction and Acceptance Specifications for Concrete Pavement of Highway Engineering" (JTG F40 – 2004), under normal circumstances, the allowable deviation of the flatness of concrete pavement should be controlled within ±3mm. High-standard pavement such as highways: For highways and other roads with high requirements for driving comfort and safety, the allowable deviation of the flatness should be more stringent, generally controlled within ±2mm.   During the construction process, the use of concrete laser leveling machine (concrete laser leveling machine) can help improve the flatness of the concrete pavement. The concrete laser leveling machine uses the horizontal laser as the reference surface to control the ground elevation, which can effectively ensure the levelness and flatness of the ground. Its application advantages include: Precise elevation control: The concrete laser leveling machine uses a laser measurement and control system to control the elevation in real time. There is no need to pull a control line for leveling, nor is there a need to support the side template to control the ground elevation, thus avoiding elevation errors caused by template vibration or manual block support during construction. Extremely small flatness error: When applied to large-area floor construction, the ground elevation is easy to control. The entire floor only requires 1-2 reference point elevations, which can reduce the error caused by multiple reference points. As long as the laser transmitter is not disturbed, no matter where the leveling machine moves, it can ensure that the overall elevation of the paved ground is not affected, and the flatness error is extremely small. Better ground integrity: Using a concrete laser leveling machine for floor construction, it is easy to achieve one-time overall paving of a large area of ​​floor. It can be divided into blocks as needed, and the construction can be continued until the entire floor is completed, making the ground integrity better. The ground is more compact and uniform: When the concrete laser leveling machine is leveling the concrete, it is always in a uniform speed construction state. Through the high-frequency vibrator of 4000 times per minute, the vibration plate of the leveling head produces uniform high-frequency vibration, making the concrete ground more compact and uniform.   —-          Click the below to jump immediately!!!          —-     ARMOUR JOINT LASER LEVELING MACHINE LIGHT TOWER POWER TROWEL SLIPFORM MACHINE STEEL FIBER TOPPING SPREADER TRACKED MINI DUMPER  

The cold wave is coming and the temperature drops sharply. In order to reduce the impact of low temperature on the laser leveling machine equipment, Wanshi Friendly reminds you to do a good job in keeping the laser leveling machine cold and warm to prevent "frostbite" incidents of the equipment, so as to avoid inconvenience to you. or cause unnecessary losses. The cold wave is coming, how to maintain the laser leveling machine in winter? 01 "Great health care" in the off-season, "Roll up your sleeves and do it" in the peak season When the winter cold wave hits, floor construction gradually enters the off-season, and the laser leveling machine is parked for a long time. It is necessary to pay attention to "equipment maintenance" and ensure that the laser leveling machine equipment is in good working condition at all times, so that it can be used for the first time when the construction peak season arrives. Invest in on-site work at once to seize market opportunities. However, low-temperature construction in winter is also a huge challenge and test for concrete and concrete laser leveling machines. Do a good job of maintenance in the off-season and seize market opportunities in the peak season! As the pioneer and leader of laser leveling machines, Wanshi concrete laser leveling machine product series can fully meet the concrete floor pouring and paving construction of different types of construction projects. Currently, it occupies more than 80% of the national market share and the global market share. It is also increasing year by year. Especially as an important construction equipment for high-end floors such as logistics warehouse floors, high-quality factory floors, garage floors, and ultra-flat wear-resistant floors, Wanshi Concrete Laser Leveling Machine plays a vital role for floor builders. effect. 02 Laser leveling machine, winter maintenance tips Today, Wanshi will bring you tips on winter maintenance of concrete laser levelinging machines. I hope you can do a good job in winter maintenance of the equipment, protect your investment, and become your money-making machine! 1. Maintenance recommendations for large laser leveling machines and spreaders: 1) Add diesel and antifreeze suitable for the local temperature according to the area where the equipment is located. 2) When the device is idle, you should pay attention to the battery level. The battery can be removed when the equipment is parked for a long time. If it is difficult to start, an auxiliary battery can be added. 3) Replace the third engine filter. 4) Add butter in time and clean the piston rod and other parts of the oil cylinder. 5) The equipment needs to be cleaned and dried before being put into storage, otherwise the equipment will freeze and cause damage to the pipelines. 6) During winter construction, it is necessary to preheat the equipment and wait until the hydraulic oil reaches the working temperature before proceeding with construction. 2. Maintenance suggestions for small laser leveling machines: 1) After construction, clean the machine, move it to a ventilated and sunny place, and dry it in the sun and blow dry to prevent freezing. 2) Butter should be added in time. 3) Clean the engine carburetor, replace the air filter element, and replace the oil filter element. If it is difficult to start, add an auxiliary battery. 4) The equipment needs to be preheated before use. If something happens to your device, don't worry! When you choose Wanshi equipment, you also choose to have worry-free after-sales protection. We provide all customers with high-quality after-sales service 7 days x 24 hours x 365 days. Wanshi provides 7 days x 24 hours x 365 days round-the-clock service If you have any problems with the operation of your device, you are welcome to contact us at any time. Remote telephone after-sales guidance is an efficient after-sales support method. Our after-sales service engineers will contact you as soon as possible and help you restore normal operation of the equipment as soon as possible.

    In the field of construction engineering, leakage has always been a core threat to structural safety and functional experience – moisture in basements leads to moldy decoration, roof seepage erodes steel bars, and wall leakage affects living comfort, and it will also accelerate the carbonation of concrete and the aging of the structure. Traditional waterproofing techniques (membranes, coatings) rely on external additional layers, which are prone to failure due to material aging, construction hollowing, and temperature difference deformation. Although ordinary self-waterproofing structures enhance their impermeability by optimizing the density of concrete, they are difficult to deal with micro-cracks caused by temperature stress and load fluctuations in the later stage. Self-healing structural self-waterproofing technology, with its innovative mechanism of "actively repairing micro-cracks", has achieved a leap from "passive anti-seepage" to "active self-healing", and has become a core waterproofing solution for high-end buildings and special projects. This article, based on the technical practices of the three major brands, Pengneichuan (Penetron), Sika, and liwei, systematically analyzes the technical key points, brand differentiation solutions, and engineering application norms of self-healing structure self-waterproofing. 1. Concept: Self-healing structural self-waterproofing is based on the "material improvement – construction control – structure optimization" of ordinary structural self-waterproofing. By adding self-healing functional components (such as active crystallization agents, capsule repair agents, microbial agents, etc.), after the concrete generates micro-cracks with a width of ≤0.3mm, it can be triggered by moisture, air or chemical conditions. A technical system for independently completing crack filling and restoring impermeability performance. 2. Core logic: "Hazard Prediction – Proactive Response – Performance Reset" (1) Hidden danger prediction: During the service of buildings, due to temperature changes (thermal expansion and contraction), load fluctuations (dynamic load impact), and dry-wet cycles, 0.1-0.3mm micro-cracks are bound to occur (the crack resistance of ordinary concrete is limited, and such cracks are hard to avoid), and cracks are the main channels for water seepage. (2) Active response: The "self-healing components" pre-installed inside the concrete (such as Pengnei Chuan's active crystalline particles and Sika's capsule repair agent) are activated when cracks occur – either reacting with water to form a gel, or breaking to release the repair agent, or being metabolized by microorganisms to produce crystals; (3) Performance reset: Self-healing products fill the cracks and re-form a dense impermeable barrier, restoring the original impermeability of the concrete. This technology is particularly suitable for scenarios with extremely high requirements for waterproofing reliability and durability, such as subway tunnels, nuclear power plants, water conservancy projects, and basements of super high-rise buildings. The implementation of self-healing structure self-waterproofing should revolve around "self-healing material selection – construction adaptation – performance verification", and the core technical links should comply with the "Technical Code for Self-Healing of Concrete Structures" (CECS 378-2021) and relevant national standards: The performance key of self-healing waterproof concrete lies in the "self-healing functional components". Currently, the mainstream technical routes are divided into three categories, and the appropriate solution should be selected according to the engineering scenario: Self-healing technology route Internal admixture self-healing agent Microbial self-healing Fiber-reinforced self-healing In addition, the base concrete should meet the following requirements: strength grade ≥C35, impermeability grade ≥P8, and the admixtures should be Grade I fly ash (with a content of 15%-20%) or mineral powder (with a content of 25%-30%) to enhance the density of the concrete and the compatibility with self-healing components. The construction of self-healing concrete should, on the basis of the self-waterproofing of ordinary structures, strengthen the "uniformity of self-healing components" and "crack induction control", with key control points: (1) Mixing and pouring: For capsule-type self-healing agents, the "post-mixing method" (adding them in the last 30 seconds of concrete mixing) should be adopted to prevent capsule rupture. Microbial agents need to be added simultaneously with the aggregates, and the stirring time should be extended to 120-150 seconds to ensure the uniform distribution of the agents. The thickness of the layered pouring should be no more than 400mm, and the spacing of the vibration rods should be no more than 350mm to prevent the aggregation or damage of self-healing components. (2) Curing and crack induction: Within 24 hours after pouring, adopt "water storage + film covering" curing (humidity ≥90%, temperature ≥15℃), and extend the curing period to 21 days – sufficient moisture can activate self-healing components (such as microbial metabolism, expansive agent reaction); For large-volume concrete, "induction joints" (with a spacing of 8-10m and a depth of 50-80mm) should be reserved on the surface to guide the formation of cracks at the preset positions, facilitating the concentrated repair of self-healing components. (3) Construction joint treatment: In addition to the conventional waterstop steel plate, a "self-healing interface agent" (such as microbial agent slurry, with a application rate of 0.3kg/㎡) should be applied to the interface of the construction joint to enhance the self-healing ability of the new and old concrete bonding surface and prevent interface leakage. (1) Moisture guidance structure: Set up "micro-seepage water channels" (10-15mm in width and 0.5% in slope) on the basement floor and roof slabs. When micro-cracks occur, guide the moisture to contact the self-healing components, accelerating the repair reaction. (2) Monitoring and supplementary repair nodes: Pre-embed "crack monitoring sensors" (with an accuracy of 0.01mm) at key locations such as tunnels and water pools to monitor the crack width in real time. If the crack exceeds the self-healing range (> 0.3mm), self-healing slurry (such as microbial agent slurry) can be injected through the pre-embedded grouting pipe to achieve artificial auxiliary repair. (3) Node reinforcement: The part where the pipe passes through the wall plate adopts "self-healing waterproof sleeve" (the inner wall of the sleeve is coated with permeable crystalline paint, and the gap is filled with expansive self-healing sealant), providing dual protection for the impermeability of the node. From the three dimensions of anti-seepage, repair and lifespan, the self-waterproofing advantages of the structure are significant. The specific comparison is as follows: Comparison dimension Traditional waterproofing (membrane/coating Ordinary structure self-waterproofing Self-healing structure is self-waterproof Crack treatment capacity The crack cannot be repaired and leakage is prone to occur at the crack Relying on the inherent density of concrete, micro-cracks are prone to develop into leakage channels Actively repair micro-cracks of ≤0.3mm to prevent leakage from spreading Service life 5 to 10 years (material aging) 30 to 40 years (cumulative failure due to micro-cracks) Have the same lifespan as the building (≥50 years, with continuous self-healing function) Environmental adaptability It is prone to aging at high or low temperatures and has poor resistance to acids and alkalis It has good weather resistance, but its resistance to chemical erosion is limited Acid and alkali resistant (microbial type), high and low temperature resistant (-30℃ to 80℃) Later maintenance cost The maintenance cost is approximately 60% of the initial cost every 10 years Grouting repair is required every 20 years, with a cost of approximately 30% of the initial No regular maintenance is required. Only in extreme cases is auxiliary repair needed Applicable scenarios Roofs and bathrooms of civil buildings General basements and factory buildings Subways, nuclear power plants, water conservancy hubs, super high-rise buildings At present, the mainstream technology can only repair micro-cracks with a width of no more than 0.3mm. If the crack width is greater than 0.3mm (such as structural cracks caused by loads), epoxy resin grouting and sealing should be used first, and then the micro-branch cracks should be repaired by self-healing components. The self-healing function cannot be relied on completely. It is necessary to add a "Self-healing performance special Test" : ① Artificial jointing test (prefabricate 0.2-0.3mm cracks on concrete test blocks, and test the permeability after 28 days of water storage, which should be ≤0.01L/m² · h); ② On-site core sampling inspection (drill a core sample of Φ100mm and observe the crack healing condition. The healing rate should be ≥80%). Although the initial material cost is 15% to 20% higher than that of ordinary self-waterproofing structures, the total life cycle cost is lower. Calculated based on a 70-year building lifespan, ordinary self-waterproofing structures require 2 to 3 repairs, and the total cost is approximately 1.8 times that of self-healing types. At present, in civil buildings, some high-end residential basements and roofs have adopted a composite solution of "microbial self-healing + penetrating crystallization", and its cost performance is gradually improving. (1) Metro tunnel: Use "capsule-type self-healing agent + fiber reinforced" waterproof concrete (C40/P10), with a self-healing agent dosage of 1.0kg/m³ and a fiber dosage of 1.2kg/m³. During construction, the reserved spacing of the induction joints is 8 meters, and the curing period is 21 days. One year after the opening to traffic, the micro-crack healing rate of the tunnel lining reached 92%, and there was no leakage. (2) Water conservancy water pool: "Microbial self-healing concrete" (C35/P12) is adopted, with a microbial agent concentration of 10⁹ CFU/mL and a nutrient carrier dosage of 2.0kg/m³. Through the monitoring of pre-embedded sensors, the 0.2mm crack was completely healed within six months, and the permeability coefficient dropped below 1×10⁻¹¹ m/s. When applying self-healing structural self-waterproofing to old buildings, it is necessary to first carry out the process through three steps: "crack detection – interface treatment – self-healing enhancement". (1) Crack detection: Use an ultrasonic detector to scan the walls and floor slabs, mark the location and width of the cracks. For cracks larger than 0.3mm, grouting and sealing are carried out first. (2) Interface treatment: Chisel off the original concrete surface layer (with a depth of 30-50mm), and apply a "self-healing interface agent" (such as a mixture of silica fume and microbial agent slurry). (3) Construction of self-healing reinforcing layer: Pour 50-80mm thick self-healing fine aggregate concrete (C35/P8, mixed with 0.8kg/m³ expansive self-healing agent), and conduct a water-tightness test after 14 days of curing to ensure there is no leakage. The following acceptance items should be added in accordance with the "Technical Code for Self-Healing of Concrete Structures" (CECS 378-2021) : (1) Detection of self-healing component dosage: The sampling and weighing method is adopted to ensure that the dosage of self-healing agent and bacterial agent meets the design requirements (deviation ≤±5%). (2) On-site self-healing performance testing: Pre-fabricate 0.2mm cracks on the structural surface. Observe no leakage after 24 hours of water storage. After 28 days, test the crack healing rate to be ≥80%. (3) Long-term monitoring data: The embedded sensors need to provide a report on the change in crack width within six months to ensure that no new cracks occur and the old ones continue to heal. The self-healing structural self-waterproofing technology, through an innovative mechanism of "actively repairing micro-cracks", addresses the pain points of traditional waterproofing, such as "easy failure", and ordinary structural self-waterproofing, such as "difficult crack resistance". It is particularly suitable for engineering scenarios with extremely high requirements for waterproofing reliability and durability. With the decline in material costs and the maturation of technology, it will gradually be popularized in civil buildings in the future.   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.