Technical Knowledge
How does a concrete laser leveling machine work?
How does a laser leveling work?
Do you know the leveling process of laser leveling machine? For how to do a good job in floor engineering, the selection of materials and construction technology are equally important. Laser leveling machine is also the key point that needs to be grasped in the construction process. Industrial plants have high requirements on the flatness of the ground level and surface resistance. Manual construction is difficult to grasp and control, and it is difficult to achieve standardized construction. The following articles are how to construct laser leveling machines and precautions, and how to avoid construction errors.
Preparation
The construction of the floor project needs to be fully prepared. From laying the base and steel mesh – setting the dowel bar – placing the buffer zone – concrete mixing, every step is carefully grasped the details.
(1) After the base layer is processed, the equipment of the laser paver is debugged, and the original benchmark point is used as the fixed reference level point; the non-woven fabric is laid, the side formwork is supported, the laser transmitter is erected, and the ground level is introduced into the laser leveling machine according to the original benchmark point. (2) Commercial concrete is used for transporting concrete, and the commercial concrete is transported to the entrance and exit of the garage by tank truck, and then transported to the construction site by a three-wheel dump truck. (3) Scale calibration Use a hand-held laser receiver to check the floor elevation, introduce the elevation into the laser paver, and adjust the reference point (±0.00) on the leveling machine.
Concrete paving + laser leveling
The concrete mixed in the mixing station is pumped and paved on the gravel base. The paving speed of the laser leveling machine should be appropriate, and the paving can be quickly assisted by manual paving.
Initial grinding and broken pulp
About 3-4 hours after the concrete is paved by the laser leveler, the best time is when there are no clear footprints after the master. Use a single-disc or double-disc trowel, install a rubbing disc, and rub it repeatedly during the initial setting of the concrete until the concrete slurry is released. Use a single-disc and double-disc trowel, install a smoothing disc, and rub it repeatedly when the concrete bleeds and initially sets until the concrete slurry is released.
Throw wear-resistant aggregate
It is recommended to throw the specified amount of wear-resistant material evenly on the concrete surface just after the grout is broken, and the places that lose water quickly near the formwork, columns, doorways, walls, and pits should be thrown first. Depending on the specific conditions, special materials can be thrown in more than two times. 2/3 of the amount of the first throwing; the remaining 1/3 of the second throwing; the time interval between the two spreading of aggregate should not be too long.
compact aggregate, smooth
After the aggregate is sprinkled once, after the aggregate absorbs the coagulated water, the aggregate is polished and compacted with a trowel, and then the aggregate is sprinkled for the second time, and the compacted aggregate is polished with a trowel. The amount of wear-resistant aggregate is not less than 5kg/㎡. During the grinding and compacting process, a ruler can be used to assist scraping. If it is not smooth, adjust the distribution of aggregates and grind again. The number of grinding times of the laser leveling machine can be operated by construction personnel according to specific conditions. The corners are scraped manually. The front and back grinding directions are criss-crossed, and the flatness is checked with a ruler after the grinding is completed.
Concrete finishing
Depending on the hardening of the concrete, perform at least three trowel operations without discs after the surface has faded. The operation speed and angle of the trowel should be adjusted according to the hardening of the concrete. It is recommended to adjust the angle of the blade at the beginning of each finishing to avoid damage to the floor.
Conservation
After scientifically completing the laser leveling machine construction process, it takes more than 28 days to maintain the floor. After the construction is completed, sprinkle water for maintenance, and lay geotextiles to reduce water evaporation and keep the wear-resistant floor after construction in water.
Eight construction steps: cutting expansion joints
Cut the expansion joints after the concrete has been watered and cured for 24 hours. Because the interval between the wall pillars is about 7 meters, which meets the requirements of the expansion joint gap, the expansion joints are mainly distributed according to the structure of the wall pillars, forming a layout of 7m*7m; the depth is about 6-7cm, and the gap is about 5mm.
POINTS FOR ATTENTION
First of all, it is necessary to ensure that all parts of the laser leveling machine are connected in good condition without any looseness to prevent problems during the operation;
Add enough lubricating oil to the laser leveling machine in advance to improve the flexibility of the controller so as to improve work efficiency;
The surface insulation part of the cable must be complete, and a little bit of damage must be treated with caution until it is completely intact. This will not only ensure the safety of construction personnel, but also the safety of passers-by.
After turning on the power, you need to check the direction of rotation of the motor. If there is an error, change the wire immediately to avoid bigger problems during work.
The personnel who operate the laser leveling machine must undergo professional training. During the operation, such elements as not tilting and not holding too tightly must be mastered to avoid careless accidents.
During the construction process, the laser leveling machine needs dense soil, which can be compacted repeatedly on the spot without moving back and forth, so that even if the result is the same, more energy will be spent on moving, which is uneconomical;
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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.
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Explanation on the operation of small concrete laser leveling machine
Small laser leveling machines can be divided into small four-wheel driving laser leveling machines and walk-behind two-wheel laser leveling machines. The operation methods of small laser leveling machines are as follows: 1. Place the laser transmitter and set the height of the laser receivers at both ends of the laser leveling machine head. 2. Drive the machine to the concrete working area where the material has been spread. 3. According to the operator's instructions and with reference to the constant benchmark provided by the laser transmitter, the leveling machine head automatically lowers. 4. Reverse the machine slowly and evenly to compact the concrete to the finished surface of the floor. 5. Drive the laser leveling machine to the right, repeat the above operation, and pay attention to the sufficient overlap of the previous leveling track. 6. When the laser leveling machine completes the construction of a wide width of the formwork from left to right (depending on the floor design, sufficient concrete transportation, etc., the width of the formwork can range from 20m to 50m), drive the machine to the Remove the concrete to the far left of the pouring area and repeat the process.What blade type fits different concrete hardness for power trowel?
Choosing the right blade is about matching the abrasiveness and toughness of the concrete slab as it cures. Using the wrong blade can either "burn" the floor (black marks) or wear out your equipment in minutes. Here is the breakdown of blade types and when to swap them: Strictly speaking, these are large steel disks that clip onto the blades, but they are the first "type" you'll use. Concrete State: Wet/Plastic. You can leave a 1/4" to 1/2" footprint. Hardness Profile: Soft/Fresh. Use Case: To break down high spots and fill low spots left by the laser leveling. Pans provide the highest Floor Flatness (FF) because they have a massive surface area. The workhorse of the industry. Concrete State: Damp to Firm. Footprint is roughly 1/8". Hardness Profile: Standard setting concrete. Use Case: These are used as the concrete begins to harden. They are stiff enough to apply pressure but flexible enough to "flick" the cream back into the pores. The Catch: If the concrete is very "hard" or has high silica content, these blades will wear down quickly and can leave dark burnish marks if you aren't careful. The "Insurance Policy" for colored or decorative concrete. Concrete State: Firm to Hard. Hardness Profile: High-performance mixes or light-colored slabs. Use Case: If you are working on a white or light-gray floor where burn marks (black streaks from steel friction) would be a disaster. Plastic blades give a smooth finish without the metallic discoloration. A hybrid between a float blade and a finish blade. Concrete State: Medium-Firm. Hardness Profile: Versatile. Use Case: Designed for operators who don't want to swap blades mid-job. One side is wide (for floating) and the other is pitched for finishing. They are great for small-to-medium residential jobs but usually aren't precise enough for ultra-flat industrial floors. Concrete Hardness / Type Recommended Blade Primary Benefit Fresh / Soft Float Pans Maximum flatness; high "cream" Standard / Mid-Day Carbon Steel Finish High durability; classic shine Ultra-Hard / Fast-Set Blue Steel Blades Extra flexibility; prevents "chatter" Light Colored / Dyed Plastic (Poly) Blades Prevents black burnish streaks Epoxy / Specialty Stainless Steel Prevents rust contamination If you are dealing with High-Early strength concrete (which gets hard very fast), look for Blue Steel blades. Blue Steel is thinner and more flexible than standard gold or silver steel. This flexibility allows the blade to "give" a little when it hits a hard aggregate stone, preventing the machine from "chattering" or bouncing, which is common on hard-set slabs. Would you like me to explain how to tell if your blades are "spent" and actually damaging your floor flatness? Contact us NOW 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.What are the precautions for operating a concrete power trowel?
PRECAUTIONS FOR OPERATING CONCRETE TROWEL 1. Preparation before operation 1). Check whether the power cord is in good condition and whether it is burned. 2). Check the lubrication system of the trowel and confirm whether there is enough lubricating oil in the oil tank and chain on the chassis. 3). Confirm whether all parts of the trowel are intact. If they are damaged or loose, they should be replaced or repaired in time. 4). Prepare necessary tools and materials, such as mixers, vibrators, cement, sand, etc. 2. Safety precautions 1). Safety equipment such as safety helmets and protective gloves must be worn during operation. 2). During operation, it is prohibited to extend your hands into the trowel to avoid danger. 3). When using the trowel, you should pay attention to the safety of the surrounding environment to avoid accidents caused by improper operation. 4). During the operation, if you encounter any danger or abnormal situation, you should stop the operation immediately and report to relevant personnel. 3. Post-operation maintenance 1). Clean the residue and debris on the surface and inside of the trowel to keep the machine clean. 2). Check whether all parts of the trowel machine are loose or damaged. If so, repair or replace them in time. 3). Regularly add lubricating oil to the chain and bearings of the trowel machine to keep the machine in good operating condition. 4). When storing the trowel machine, it should be placed in a dry, ventilated place without direct sunlight to avoid the impact of moisture, mildew and other adverse environments on the machine. At the same time, the power cord of the machine should be organized and fixed to prevent short circuits in the wires from causing safety hazards.
