Concrete flooring is a staple in commercial, industrial, and public spaces due to its reflective, hygienic, and durable properties. Polished concrete is an ideal choice for manufacturing facilities, warehouses, schools, and other commercial properties, as it saves energy by reflecting light and can last for decades. However, concrete can be challenging to work with once it has set, requiring powerful machinery for grinding, polishing, and repair.

If you need to level or repair freshly laid concrete, or prepare an existing floor for adhesives or coatings, a concrete grinder is essential. This machine, along with other high-quality flooring equipment, helps achieve smooth, polished, or prepped surfaces efficiently. Let’s explore concrete grinders in more detail.

What is a concrete grinder, and how does it work?

A concrete grinder is a machine designed to grind and smooth concrete surfaces. Available in various shapes, sizes, and configurations, these grinders cater to a wide range of applications. For instance, hand-held angle grinders are ideal for smaller tasks like edge grinding or cutting, while large industrial walk-behind grinders are perfect for extensive commercial floor grinding.

Walk-behind grinders are more robust and powerful, handling greater stress due to the high sliding friction required for large-scale grinding.

These machines use abrasive materials, such as diamond-coated discs and blades, to grind concrete. These abrasives come in different grit levels, from coarse for heavy grinding to fine for polishing, making concrete grinders versatile tools for surface preparation and finishing.

Many other uses for floor sanding and concrete grinders

A concrete grinder is an extremely versatile tool. With a concrete grinder you can grind a small layer of concrete on the surface of your floor in preparation for adhesives or polishing.

Floor Grinding and Levelling

Before polishing or painting a concrete floor, the surface must be properly prepared beforehand. If a concrete floor is cracked, damaged or simply uneven, then it must be levelled before it can be polished or painted. Floor grinders are designed to do just that. Using rapidly rotating discs, walk-behind floor grinders smooth any inconsistencies in the concrete’s surface and edges. The process of concrete grinding results in a smoother, more level and consistent finish. Once the dust is removed, the floor should be ready for the polishing or painting process.

When a concrete floor is cured and set, a floor grinder is required to go over the surface several times with the coarsest diamond discs. Only when the floor is level can a grinder polisher machine, with fine-grit diamond discs, be used to achieve the final polish sheen.

Polishing Concrete With a Grinder Polisher

As mentioned above, once a concrete floor has been ground down to a satisfactory smoothness, it can then be polished with a finer grain diamond disc. Just like sanding down a piece of wood, the process always starts with a coarse disc and moves towards finer abrasives each time it is ground. Once the concrete floor has been ground to a satisfactory level and smoothness, the polishing process can begin with a grinder polisher machine. Depending on the level of shine required for the floor, between 1500 and 3000 grit is usually used for the final polishing.

Paint, Latex and Adhesive Removal

A large part of concrete floor preparation consists of removing materials and coatings from the surface. Some contractors may decide to use chemicals, power washing tools or even large quantities of baking soda to remove paint, latex or adhesives. However, by far the most efficient and effective method for removing paint from a concrete floor is by using a concrete grinding machine.

Using a walk-behind floor grinder provides a chemical-free solution to coating removal. Moreover, once the coating has been removed, the ground and polished concrete will be ready for a new layer of adhesive, paint or latex paint. Through floor grinding, you can remove the existing paint and prepare the surface for a new coat simultaneously.

Bitumen Removal

Bitumen is an adhesive material that may contain asbestos and was widely used up until the 1980s as part of the flooring process. As an affordable, fire-proof and water-resistant material, bitumen was very popular for floorers. However, we have since discovered the deadly impact that asbestos can have on our health. With that in mind, bitumen must be removed from floors when found. If discovered, an asbestos survey should be performed on the property to ensure that any asbestos can be removed in compliance with the relevant legislation.

When removing bitumen from a floor, by far the most effective method of doing so is by using a concrete floor grinder. Solvents and sanding simply won’t cut it and can even make the situation worse. Instead, depending on the range of power you have access to, either grind the area with a single-head floor grinder (if you have access to three-phase power) or scabble and then grind with single-phase power.

Screed Removal

Screed is often confused with concrete. Although concrete and screed have chemical similarities, they are fundamentally different. The main differences between screed and concrete are the size of the aggregates used, the grade and finish of the cement as well as the mix consistency used. Screed is a much thinner layer of material that is poured onto a floor and then set to create a smooth coating under the top layer. Screed is commonly found underneath tiles or above underfloor heating systems with a damp-proof membrane attached above.

When repairing or renovating a floor, you may need to remove the layer of screed. Again, an efficient and effective method of removing screed is to grind it down using a concrete grinder. This process will prepare the floor for a new layer of screed or a change in the flooring material.

Available options when choosing a concrete grinder

Preparation Grinders

Preparation grinders are the perfect choice for areas of concrete flooring which require adhesive removal, a mechanical key or a heavy-duty grind. Smaller concrete grinders are designed to operate with limited space and remove old coatings, oil deposits and stubborn dirt. Larger concrete grinders are typically petrol-powered or require a significant amount of electricity from a generator or other power source. These heavy-duty options are also used to remove existing coatings as well as improve faults in a slab.

Polishing Finishing Grinders

Polishing finishing grinders are used by contractors once a preparation grinder has removed existing adhesives and prepared the concrete. These diamond grinding machines create the final glossy sheen of a reflective concrete floor. The type of concrete polishing finishing machine you choose will largely depend on the area of concrete you need to polish. Smaller areas of concrete, with limited access to power, will likely require smaller pieces of kit like the JADE350 Grinder Polisher.

If you have been looking for Professional Concrete Floor Grinding Machine Service Provider, then visit Liaocheng JADE Outdoor Power Equipment Co. We were established many years ago and have earned a reputation for our high quality products and excellent customer service!

Providing High Quality Floor Grinding Machine

We can offer a wide range of floor sanding, polishing and buffing equipment to our commercial customers. Whether you need machines for leveling, preparing, sanding, repairing or polishing floors, we have the equipment to meet your needs. In addition, our expert technicians can provide equipment demonstrations and installation services. So whether you are experienced but just need a machine, or you need someone to help guide you through the process, contact us today!

For further information about our services, please feel free to contact us