Chemical anchors are used in constructions for the durable fixation of threaded auctions, reinforcement bars and metal vaults, with light, medium or heavy activities. The capture of these elements can be performed on difficult surfaces, such as classic concrete, weak consistency or broken, times, full bricks or cavities and stone. Here is everything you need to know about these products.
What does chemistry mean?
The stickers known with the name of chemical anchors are, in fact, mixtures of substances based on synthetic resins. These products are used for the anchor of metal elements (threaded rods, reinforcements, bolts), in perforated holes in different compact or empty elements – cement plate, brick masonry, poles or structural beams, etc.
Types of chemical anchors
The anchors contain 2 substances which, after mixing, solidify by chemical reaction and cause extremely resistant fixation. These can be divided into 2 great categories:
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Chemicals of capsule type glass or plastic sheet – They are predominant for a single fixation and are mounted in the hole; The substances are mixed after the metal element is inserted in the hole in the basic material;
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Dead -type chemical anchors or injection resin – They are on the tube or the two -component cartridge and are applied in holes with a gun and a mixer; They are more advantageous when you need multiple fixing points and we will focus on them in this article.
We also invite you to discover other articles on the macostter’s blog, such as: «Repair of cracks in the walls and in the floor: complete guide».
The advantages of chemical anchors
Unlike mechanical fixations (for pieces, screws, nails, etc.), chemical anchors are much stronger and can last up to 50 years. Another advantage is that they do not put pressure on the structure, because they are not expandable (they keep their volume). Therefore, they allow the anchor of the metal elements near the edge or at a short distance from each other.
The sticker can uniformly fill the holes, which prevents the penetration of water or air and the degree of membership is much better than in the case of classic fixations. Depending on the specifications of the product chosen by you, you will have advantages such as:
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the possibility of anchoring in wet or immersed environments, marine and industrial;
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application at negative temperatures;
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use the wet or wet support layers at the time of application;
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support very large tasks;
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mount on inclined surfaces or ceilings;
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seismic certification;
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Fire resistance.
How do you choose chemical anchors?
As we have previously discussed, there are different types of chemical anchors, every product that has its peculiarities. Subsequently, we prepared a series of suggestions to consider to choose the best option for your work:
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Determine what you will solve with the help of chemical anchors: threaded rods or reinforcement bars; You must also know what their diameter will be;
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Depending on the type of fixed metal element, there are some specifications of chemical anchors, as well as instructions on the size of the necessary holes (depth and diameter);
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Identify the place where you will use chemical anchors to correctly evaluate the effort to which they will be subjected and the direction on which the force of the cabinet acts to which the fixation must resist; The assembly can be performed in the floor, in the beams, on the side walls or in the ceilings;
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See what the quality of the support level is: it is possible to fix objects in new cement, broken cement, masonry, BCA;
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Identifies the tasks of objects that will be fixed with the help of chemical anchors; These products are created to be able to resist slight tasks (for example a support for TV fixing), medium activities (a metal structure above an entrance) or heavy loads (a balcony);
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Depending on the fixing position, the load and the support level, a type of anchor with certain resistance parameters are chosen.
What do you need to know when you buy chemical anchors?
After setting the right product for your needs, you have to choose a series of accessories for chemical anchors, in order to apply the mixture of substances with a fixing role. Here are other useful information that you should know:
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Chemical anchors are products that must be applied with a pistol control of the tube size and make sure you have a customized gun; You will also need a mixer to mix two -component substances;
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The quality of the anchoring depends on the accurate cleaning of the holes in which rods or threaded bars are fixed;
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For the operation of the cleaning of the holes, you will need brushes and a air pump to explode the dust from the holes; It must have a pressure of at least 6 bar and an air spear;
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Take into account the season in which chemical anchors apply: they are epoxy products and are rapidly strengthened, in about 9-10 seconds; If you apply anchors in the summer, buy special products, with a slower reinforcement; For the winter, when the temperatures are very low, you need anchoring that is quickly strengthened;
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For the application of the anchors in the masonry (bricks, stone block, etc.), perforated pieces for anchoring is needed, which distribute the substance in the structure of the wall;
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When you need to apply chemical anchors in deep holes, an extension to the static mixer will be required.
How is chemistry mounted?
Find out how to use chemistry anchor, step by step:
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First of all, from the holes with the drill, to the depth and to the appropriate diameter: each producer of chemical anchoring will specify these two parameters depending on the size of the silent auction; respect these specifications to correctly use the anchor;
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Some producers offer antipraf exercises that make the installation easier and faster, eliminating the possibility of accumulation of dust in the holes;
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Clean the holes with a blower and brushes: the cleaning of the powder must be carried out carefully for a good subsequent fixation of the chemical anchors;
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To clean the holes, you have to blow the pump at least twice, until it comes out of the holes;
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The next step is cleaning with brushes: they are also used at least twenty times and must have the larger diameter than that of the hole;
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After this step, repeat the cleaning with the air pump.
The cleaning phase of the support layer is very important because it depends on the fixation to be correct and long. Below, here’s how to use the chemistry and what are the passages related to the preparation and application of the product:
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For the actual use of the chemical anchor, a gun is necessary in which you will introduce the cartridge;
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Correct the mixer for the application of chemical anchors;
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When it undoes a new tube, do not apply the product for the first time from the tube because it is two components and should be homogenized;
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First, apply the product on a cardboard, until the color of the mixture becomes uniform;
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Only after the color of the mixture has become uniform, the product can be applied in the hole;
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Fill the hole on the volume, from the back outside;
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Immediately after the hole was filled, insert the metal auction or the bar through a rotating movement;
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Remove the excess resin and wait for the mixture to strengthen;
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Connect the wire and squeeze according to the requirements.
If you need to apply anchoring in deep holes, use an extension for the static mixer. To fix the masonry or irregular supports, use a pocket perforated for anchor first.
Are you a professional or amateur craftsman and you need more information on the chemical anchors available on macostore.ro or on their choice? Write us a message and you will be contacted as just one of our operators.
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