Technical Support

The smoothness of the floor surface is determined by how fine or coarse the diamond grit is.

A small grit size will produce a finer scratch pattern and increase tool life of the segment.

A large grit size is opposite, coarse scratch pattern, faster cutting and shorter tool life.

The tool life of the segment is also controlled by the hardness of the bond.

A hard bond normally takes longer to wear away and expose more diamond grit, conversely a softer bond will wear away quickly.

A hard bond also brings a finer scratch pattern in dry grinding.

The number of diamond segments under the floor grinder will also have an effect on the surface finish.

Increasing the number of segments will reduce the heavy load, and create a smoother scratch pattern.

Another way used to increase efficiency is to put extra abrasive material onto the floor, such as sand or silicon carbide. Especially for hard floor.

Selecting the right tooling

The main point for selecting the right diamond segment for a floor:

If the concrete is hard - use a soft bond segment

If the concrete is soft - use a hard bond segment.

Because hard concrete tends to produce fine, powdery dust, which is not very abrasive.

As a result, it doesn't help to wear down the binding material in the segment and expose new diamonds to perform the cutting action.

If the bond is too hard, the segment may stop grinding and start to glaze over on the slab.

So, you need to choose softer bond that will open up more easily to keep the diamond grit working.

On the contrary, if the concrete is soft and producing a much coarser dust, the dust will have an abrasive effect on the segment and wear it down faster.

In this instance, you should use a segment with a harder bond to avoid going through the diamond grinding shoes too quickly.

In general, the higher the compressive strength of the concrete, the harder it will be.

Compressive strength is measured in megapascals (MPa) and is specified when concrete is ordered from the supplier.

Whilst the MPA of the concrete is an important factor, the curing time is more important. The curing time on a slab is a chemical reaction between cement, water and air and if a grind can be done before a full cure, then a very hard bond diamond grinds through the slab with ease and minimal wear.

However, given the fact that the grinding process normally only deals with the surface layers (often the top 5 mm or so), the surface condition of the concrete is often far more important than its compressive strength.

For example, a highly burnished surface, caused by over-trowelling of the wet concrete, can make the surface very smooth and behave like hard concrete.

On the other hand, a rain-damaged or shot blasted surface will produce more gritty, sandy dust, and so behave more like soft concrete.

In the end, the best way to select the right tooling for concrete floor is to look up the stable quality tools manufacturer.

Sunny is a full experience and technology on diamond tools. Providing many types diamond grinding shoes for different grinders like HTC, Husqvarna, Lavina, Scanmaskin, Werkmaster, Terrco, Floorex, Flextool, ect. Welcome to contact us to know more about our products.