Cutting the joints is a crucial step in maintaining the flatness of the ultra-smooth floor. The timing and method of Cuttinging are of vital importance. To avoid damaging the millimeter-level precision achieved by the laser leveling machine, the key lies in "early" and "stability". "Early" means cutting the guiding joints before the concrete has developed internal stress; "stability" means the equipment operates smoothly, without bouncing or chipping.
Based on this principle, there are mainly two types of equipment available on the market that are suitable for cutting joints in ultra-smooth floors. The core difference between them lies in the time window for cutting.
⏱️ Key choice: Early entry Cutting vs. Traditional slit Cutting
To make it easier for you to compare, I have listed their features as follows:
| Comparison dimension | Early-Entry Cutting | Conventional Cutting |
| The timing of the cut | Within 1-4 hours after the concrete has been polished (commonly known as the "initial setting" stage) | After 6-12 hours or longer of concrete curing (usually overnight waiting) |
| Core Strengths | Prevent cracks from forming at their source: Cut the joints before the concrete begins to contract, guiding the cracks to develop in a regular pattern. This is the best way to protect the flatness of the super-level floor. | High flexibility: Suitable for all types of concrete, including hardened floors. |
| Smooth cuts: Special blades and patented sliding plates are used, resulting in almost no chipping during cutting, and the joints are aesthetically pleasing. | Adjustable depth and width: Capable of cutting deeper and wider joints. | |
| Potential risks | The time window is narrow, and high requirements are placed on construction organization. Special cutting blades must be equipped. | May cause random cracks: If the cutting is done too late, the internal stress of the concrete may have already caused micro-cracks or warping on the floor before the joint is made, thus damaging the flatness. |
🛠️ How to choose the equipment that suits your project?
The key to the decision lies in your ultimate pursuit of flatness and the scheduling of the project.
Preferred solution: Early Cutting
If your project aims for a super-flat floor with FF/FL 35 or above, or if the floor will be used in high-shelf warehouses or precision instrument workshops, then the early Cutting is the only recommended option. It actively guides the cracks before stress is formed, maximizing the protection of the perfect foundation created by the laser leveling machine.
Alternative solution： Traditional precision joint Cutting
If your project requires a slightly lower level of flatness (such as for ordinary commercial floors), or if you missed the early Cutting window due to construction schedule reasons, then choosing a high-precision, smooth-running traditional joint Cutting is necessary. The key lies in the stability of the equipment.
⚙️ Key detail: Blades are as important as technology.
No matter which equipment you choose, there are two points to keep in mind:
Special blades: For the initial cutting, you must use the blades specifically designed for this purpose. The blade head connection and formula are specially tailored for un-hardened concrete, which can prevent the blade head from falling off and ensure the cutting quality.
Smooth operation: The weight balance of the equipment and the design of the blade guard (such as whether it has a stabilizing slide) will directly affect the stability during cutting, and thereby influence the final flatness.
I hope the above information can help you make a clearer choice. If you want to know more about how to select the appropriate blade type based on the specific concrete mix ratio (such as whether fibers are added), I can help you organize more detailed information for you. 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.
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