The selection and use of polishing pads are very regular. The ground leveling and rough grinding should use diamond grinding discs or concrete thick grinding discs. Dry grinding is more material saving than water grinding, but the water grinding treatment will make the ground more uniform and fine. Wait, then when choosing a polishing pad, how should I choose? What factors will affect our choice? I will analyze it carefully with you today.
Commonly used concrete polishing pads mainly include the following: Polycrystalline diamond polishing pad: used to remove epoxy coating, which is needed when the coating is thicker;
Concrete diamond polishing pad: used for concrete floor leveling and old ground renovation;
Concrete thick polishing pad: usually refers to a diamond resin polishing pad with a thickness of 5mm or more, used for concrete floor leveling, rough grinding, fine grinding, fine grinding and polishing;
Thin concrete polishing pad: usually refers to a diamond resin polishing pad with a thickness of 5mm or less, used for rough grinding, fine grinding, fine grinding and polishing of concrete floors;
Concrete polishing pad: usually made of man-made fiber, wool or other animal hair, and some products are also added with abrasive and polishing accessories for polishing the concrete floor; how to choose and use such a variety of polishing pads Use it?
Flatness of the ground
Manually screed the leveling ground or the old ground that is loose or damaged. It needs to level or remove the loose surface layer. It needs to use a high-power grinding machine, choose a concrete diamond polishing pad and other grinding force, suitable for leveling polishing. pad. The level of flatness of the cement self-leveling floor or the trowel machine leveling is better. Only the diamond resin polishing pad can make a beautiful polished floor.
The concrete used in the design and construction of the concrete floor is indicated by the number, which is C20, C25, C30, etc., which we usually talk about. In normal cases, the higher the number, the better the strength and hardness of the concrete, but due to various The influence of factors, the number of concrete and the hardness of the ground are often not corresponding. The hardness of a concrete floor is usually expressed in terms of Mohs hardness. The hardness of the concrete floor is usually between 3-5. On the construction site, we can use some substitutes instead of the Mohs hardness tester to understand the hardness of the ground: the hardness of the scratches and scratches can be less than 5 with nails and keys. Otherwise the hardness is greater than 5.
Grinder weight and speed
Floor grinders are usually divided into small, medium and large. Generally speaking, the larger the machine, the higher the power and the higher the efficiency. In actual use, the larger the machine, the better. The grinding machine with too much weight is very efficient, but it often leads to excessive grinding and increases. Construction costs. Experienced workers will adjust the machine speed, moving speed, number of polishing pads and machine weight according to the characteristics of the machine, reduce construction costs and improve construction efficiency.
Type and size of polishing pad
The most commonly used abrasives for floor treatment are 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. Metal-based polishing pads are used for floor surface pretreatment and rough grinding. Resin-based polishing pads are used for rough grinding, fine grinding, fine grinding and polishing. Particle size refers to the size of the diamond particles contained in the abrasive tool. The lower the number, the larger the particle size.
The PCD polishing pad is not granular, but it is directional, so pay special attention to it when using it.
Metal polishing pads are usually divided into several numbers such as 30#, 50#, 100#, 200#, etc. Which granularity number should be determined according to the ground conditions, such as poor ground flatness or loose surface, may need to use 30# The metal polishing pad removes the loose surface to level the ground. The ground that needs to be sanded or grinded usually requires a 50# or 100# metal polishing pad.
Resin polishing pad is widely used, grain size No. 30#- 3000#, different grain size numbers are distinguished by different color adhesive cloths, used for ground coarse grinding, fine grinding, fine grinding and polishing; resin polishing pad has hard polishing pad and soft The difference between the polishing pad and the hard polishing pad is better. It is more suitable for medium and large floor grinding machines. The soft polishing pad has better polishing effect and is suitable for various types of floor grinding machines.