We all know that whether it is in construction or road construction, it will involve the construction of the floor. For the construction of the floor, polishing pads will be used. There are many kinds of polishing pads, such as water polishing pad, soft diaphragm and iron diaphragm. Wait, how do we choose to face such a wide range of polishing pads? This is indeed a difficult thing for newcomers to build. Don’t worry, Tianbang will reveal how to choose a polishing pad for the construction of the floor.
First, how to choose polishing pad for floor construction
Commonly used concrete polishing pads mainly include the following:
Polycrystalline diamond polishing pad: used to remove epoxy coating, it needs to be used 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 thickness more than 5mm Diamond resin polishing pad for concrete floor leveling, rough grinding, fine grinding, fine grinding and polishing; concrete thin polishing pad: usually refers to diamond resin soft polishing pad with thickness less than 5mm, used for coarse grinding and fine grinding of concrete floor. Fine grinding and polishing; concrete polishing: usually made of rayon, wool or other animal hair, and some products are also added with some abrasives and polishing accessories for the polishing of concrete floors;
How do we choose and use such a wide range of polishing pads? To understand how to properly select and use polishing pads, we need to understand some of the following terms about flooring and grinders:
1. The flatness of the ground: artificially smeared the leveled ground or the old ground with serious looseness and damage. It is necessary to level or remove the loose surface layer. It is necessary to use a high-power grinding machine and select a concrete diamond polishing pad to grind it. Suitable for leveling polishing pads. 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, and the polishing pad is also relatively economical.
2. Hardness of the ground: The concrete used in the design and construction of concrete floors is indicated by the number, which is C20, C25, C30, etc., which we usually talk about. The higher the number of normal concrete, the better the strength and hardness of concrete. However, due to various factors, the concrete marking and the ground hardness often do not correspond. 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 replace the Mohs hardness tester with some substitutes to understand the hardness of the ground: the hardness of the damaged scratches can be less than 5 by using nails and keys. Otherwise, Hardness is greater than 5.
3, the weight and speed of the grinder: 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 large and too heavy is highly efficient, but it often leads to excessive grinding and increase. 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.
4. Types and particle size of polishing pad: The most commonly used abrasives for floor treatment are PCD polishing pad, metal-based polishing pad and resin-based polishing pad. PCD polishing pad is used to remove thick coating on the floor surface. Metal-based polishing pad is used for Floor surface pretreatment and rough grinding treatment, resin-based polishing pad is used for surface rough grinding, fine grinding, fine grinding and polishing treatment. It refers to the size of diamond particles contained in the grinding tool. The lower the number, the larger the particle size.
PCD polishing pad is not divided into grain size, but it is directional, which should be paid special attention when using it; metal polishing pad is usually divided into several numbers such as 30#, 50#, 100#, 200#, etc. Which granularity number to use should be determined according to the ground conditions. For example, if the ground flatness is not good or the surface is loose, it may be necessary to use a 30# metal polishing pad to remove the loose surface layer to level the ground. The ground that needs to make a matte and grindstone effect is usually required. Use 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 rough grinding, fine grinding, fine grinding and polishing. Treatment, resin polishing pad has the difference between hard polishing pad and soft polishing pad. Hard polishing pad has better leveling effect. It is more suitable for medium and large floor grinding machines. Diamond soft polishing pad has better polishing effect and is suitable for various kinds. Type of floor grinder.
Hard concrete floors are recommended to use soft base metal polishing pads, use sharp resin polishing pads, increase machine weight, reduce mill speed, and reduce forward speed.
Soft concrete floors are recommended for hard metal polishing pads, durable resin polishing pads, increased mill speed, and faster forward speeds.
The quality of the domestic concrete floor is mostly not ideal, especially the renovation of the old ground, the flatness is not good, the ground is loose, the hardness is very poor, the water mill process produces a large amount of mud, and the abrasive consumption is particularly severe. On such a ground, it is recommended to use medium and large ground. Ping grinding machine, after shaving and dry, use dry dry grinding, first select 30# hard base metal polishing pad to remove loose layer to leveling treatment, then use 100# medium hard or soft base metal polishing pad to grind, flatness and foundation The hardness is handled well, and the back is much simpler.
Second, the correct choice of polishing pad benefits
The correct selection of polishing pad can improve the efficiency and reduce the cost. The selection and use of the polishing pad are regularly followed: the ground leveling and rough grinding use diamond polishing pad or concrete thick polishing pad; the fine sand polishing pad can handle the good without coarse sand. Polishing pad; increasing the weight of the grinder or increasing the speed can improve the efficiency; try not to use the polishing pad with the skip number; the dry grinding saves the consumables more than the water grinder, but the water grinding treatment will make the ground more even and delicate; wash the floor and dry it after use The thin polishing pad has a better effect of high-speed dry polishing; the use of a sponge polishing sheet can improve the brightness of the floor.