Grinding sheets are often used for ground renovation. Under normal circumstances, grinding discs can be divided into diamond water grinding discs, diamond soft grinding discs, concrete diamond grinding discs, concrete water grinding discs and floor refurbishing discs, etc. However, suitable grinding discs need to be selected for polishing according to different ground conditions. Today I will explain several important factors that influence the selection of grinding discs.

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. Construction cost. 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, diamond abrasive cloth, 

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