Circle on concrete: advantages, classification of diamond

Modern construction can not exist without a variety of tools that have a diamond "filling". You can recall the crowns, cutters, drills, strings, but the most popular one - the diamond disc deserves special attention. In this article we will consider it in as much detail as possible.

Artificial diamond

Еще в Древнем Риме для обработки камней применялись натуральные алмазы, но первым, кто решил создать из них полноценный инструмент был часовщик из Швейцарии лишь в 30-х годах прошлого века. Спустя два десятилетия была предпринята удачная попытка синтезирования искусственного материала, в результате чего патентом завладела компания General Electric (см.также статью «Товарный бетон – характеристики и использование»).

Similar developments were also carried out in the USSR, as well as in Sweden, the latter were strictly classified for them. Thanks to a diamond substitute in the 60th year in the Soviet Union, tools with its use were widely used in construction.

In the early 90s of the twentieth century, all the legacy was "washed away" by the "waves of restructuring" and it was necessary to create technologies practically anew. Therefore, companies that were able to build on their experience and make the corresponding equipment themselves in such difficult conditions deserve special praise.

Benefits

The price of natural stones is too high to be mass applied in construction. In addition, the super-strength of the material was influenced by impurities, and its shape was not always suitable.

The second minus is the size of the diamond, which was required for different works. At the same time, an artificial substitute made it possible to solve all problems at once.

The technology of its receipt is as follows:

• graphite raw materials are taken;
• in the required proportion it is mixed with iron, cobalt, manganese and nickel;
• the mixture is processed at high pressure and temperature and pressure.

The result is a relatively inexpensive, fairly solid and resistant stone (diamond), which can be given the necessary size and shape.

Diamond Disc Classification

They are usually classified by cutting edge:

• solid circles least productive and they are used to work with fragile materials;

• segment discs have a cutting surface, which is divided into certain "segments", the shape and number of which may be different. While working, they cut the ends into concrete, and not just grind it with diamonds. Dust escapes through “gaps” between segments;
• «Turbo» - The third type, which is characterized by high speed. On its working surface made special channels for the removal of dust. The diameter of the circles can be different: the standard are - 115-230 mm, but there are also one and a half meters.

Typically, diamond picks, their size, number and hardness of the bundle depend on the material for which the disc is made. In this case, the number of stones should be a little, but not a little, so that the equipment works as it should.

What makes a concrete disk different from others?

Different circles are fundamentally similar only in appearance. It should be noted that the materials, in particular, granite and marble, have different “abrasiveness”, so they will grind differently (learn here why the concrete is heated by electrodes).

For example, the first requires high static strength, large-sized diamonds, which allows them to wear off more slowly. At the same time, marble has a lower wear resistance.

The diamond cutting wheel 230 for concrete has small “stones” that are strong and do not have special strength. The next difference is the rigidity of the ligament, which must be strong relative to the “marble” tools.

Accordingly, in reinforced concrete, it is even stronger. The principal difference between circles on reinforced concrete is a very tough bond.

When reinforced concrete is cut with diamond circles, diamonds are knocked out of them by metal, the segments become "salted", as a result of which the speed decreases. After passing the interference, they are re-opened due to friction. Snap-in for highly reinforced concrete is made with a wavy cutting surface (when viewed from the side), so contact with the reinforcement will be intermittent, which allows you to slow down the "clogging".

Tip: if you had a “salting up” of an expensive disk, when its segments stopped cutting, as they became smooth, this does not mean that you have a defective tool. Most likely, it is designed to work with more abrasive material, so it has a strong bond, and it is not opened.

The shape and number of segments

Usually a cutting wheel for concrete with an external O of 230 mm has 16-18 segments. Quantity depends on performance and cost.

If you have a priority - a monetary factor, it is better to give preference to a disk with a large number of segments. It will cut faster, small parts will get the necessary cooling, which is very important when dry cutting. However, the smaller the segments on a circle, the easier it is to manufacture, so it costs less in the end.

It should also be taken into account when selecting the height of the segments. For example, when one of them is higher than the others, it will take on the greatest load, with the result that over time it will overheat. And, on the contrary, if the segment turns out to be much lower, located next to it, the diamonds on it will not “work” during cutting, and as a result it will “fill up”.

Answers to some questions:

• Does circle wear depend on the freshness of the concrete? This is true because it does not dry, but freezes, increasing its strength.
• What are the causes of overheating of the circle? When you noticed that the cutting edge began to “shine”, and small “embers” began to fly off from the segments, it means that it has undergone overheating. In this case, the reasons may be such - incompatibility with the material or wear tooling.

In the first case, the hard bond rubs on the concrete, but cannot be opened, and the resource may not be spent at all, and the cost of the tool is quite high;

Tip: what to do if you need to make a communication channel in reinforced concrete? The best option is diamond drilling of holes in concrete with special tools.

We select equipment

What is better to buy - a standard question.

The construction market is overflowed with the offer of various disks with different cost.

1. If you work with your hands with them very rarely at home, you can buy cheap circles from China. Their meager resource is compensated by the ultra-low price. But, before you pay, check on the packaging purpose of the tooling, that is not miscalculated. The instruction will tell for what purposes it should be used.
2. Attitude towards universal circles is ambiguous. Someone does not consider them at all for the tool, but only a disposable disc with diamonds, there are also those who praise their ability to cut materials that differ greatly in properties due to the fact that they have a universal bundle.

1. If you carry out intensive work, then in this case, the savings can only harm, it is better to immediately give preference to the "professional" options. Experts believe that, for example, a circle for 6000 rubles will be able to serve longer than 10 and 600.

In the construction markets there are enough manufacturers that produce relatively inexpensive, but high-quality tooling. Most often these are companies that specialize in abrasive and diamond tools.

Conclusion

Большое разнообразие кругов для работы с бетонными поверхностями не должно вас вводить в заблуждение. При выборе старайтесь отдавать предпочтение продукции, которая необходима именно для вашей работы, учитывая интенсивность ее выполнения. Не стоит переплачивать, а также не доплачивать – потеряете время и деньги (читайте также статью «Железобетонный каркас в строительстве»).

The video in this article will help you find additional information on this topic.