The selection and use of grinding discs follow the rules: diamond grinding discs or concrete thick grinding discs are used for ground leveling and rough grinding; fine sand grinding discs can be processed without coarse sand grinding discs; grinding can be improved by increasing the grinder weight or increasing the speed Rate; try not to skip the numbers and use grinding pads; dry grinding saves more consumables than water grinding, but the water grinding treatment will make the ground more uniform and delicate; after the fruit is washed and dried, use a thin grinding pad to polish at high speed. The use of sponge polishing sheet can improve the brightness of the ground, diamond soft grinding disc

1. Ground flatness

Manually level the ground or loosen the old ground that is severely damaged. The loose surface layer must be leveled or removed. Need to use a high-power grinder, choose a concrete diamond grinder with strong grinding power and suitable for leveling.

Self-leveling cement floor or trowel mechanical leveling effect is better. Only diamond resin polishing pads can make beautiful polished floors, and polishing pads are also more economical.

2. The hardness of the ground

The concrete used in the design and construction of concrete floors is represented by numbers, which are what we usually call C20, C25, C30, etc. Generally, the larger the number, the better the strength and hardness of the floor. However, due to the influence of various factors, the marking line of concrete often does not correspond to the hardness of the ground.

The hardness of the concrete floor is usually expressed in Mohs hardness. The hardness of concrete floor is usually between 3-5. At the construction site, we can use some alternatives to replace the Mohs hardness tester to understand the hardness of the floor: the hardness of the dents and scratches that can be drawn with nails and keys is less than 5, otherwise the hardness is greater than 5.

3. The weight and speed of the grinder

Floor grinding machines are usually divided into three types: small, medium and large. Generally speaking, the larger the machine, the greater the power, and the higher the speed; in actual use, it is not that the larger the machine, the better. Although the grinding rate of the super heavy grinder is very high, it will often lead to excessive grinding and increase the usage. Experienced workers will adjust the machine speed, moving speed, number of grinding discs and machine counterweight according to the machine point to reduce construction costs and increase the construction rate.

4. Type and size of grinding disc

Commonly used abrasives for floor treatment include PCD polishing pads, metal-based polishing pads and resin-based polishing pads. PCD polishing pads are used to remove thick coatings on the floor surface, and metal-based polishing pads are used for floor surface pretreatment and rough grinding. The resin-based abrasive sheet is used for rough grinding, fine grinding, fine grinding and polishing of the surface.

The particle size refers to the size of the diamond particles contained in the abrasive tool. The smaller the number, the larger the particle size.

Metal grinding discs are usually divided into 30#, 60#, 100#, 120#, etc. Which size number to use should be determined according to the ground conditions. For example, if the ground is uneven or the surface is loose, 30# may be required. Metal grinding discs are used to remove the loose surface layer and level the ground. The ground that needs frosting and stone fruit usually needs 50# or 100# metal grinding discs; resin grinding discs are widely used, and the particle size number is 30#-3000#, and different particle sizes are different The color sticky cloth is used for rough grinding, fine grinding, fine grinding and polishing on the ground. Resin grinding discs have the difference between hard grinding discs and soft grinding discs. Hard abrasive discs have better leveling effect and are more suitable for medium and large floor grinders. Soft abrasive discs have better polishing effect and are suitable for all kinds of floor grinders.

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