How to use chemical bolts in concrete

Chemical bolts are used in concrete] chemical bolts are based on the grip and wrapping force between the concrete and the mechanical occlusion force to resist the pull and the bolt itself to resist shear, mainly used in the connection of the old and new structures, the calculation of various mechanical indicators should be carried out according to the information provided by the manufacturer, because the chemical adhesives produced by various manufacturers are different, so the bonding ability is also different, there are many brands in the mainland, and the good and bad are uneven, and its performance needs to be carefully verified before use. Chemical bolts are a kind of embedded parts, which are used in the leakage of embedded parts or post-construction projects.

Installation procedure: drilling - hole cleaning - insertion of chemical tube - drilling of bolts - gelling process - hardening process - fixing of objects.

1. Drilling: According to the design requirements, the position is determined according to the spacing and margin of the drawings, and the hole diameter and depth must meet the design requirements.

2. Hole cleaning: Use air pressure blowpipe and other tools to remove the floating ash and dust in the hole to keep the hole clean.

3. Insert the medicine tube: Insert the medicine tube into a clean hole, and use the hose only when the resin can flow like honey under hand temperature when inserted.

4. Drill into the bolt: use an electric drill to screw into the screw until the agent flows out. Electric drills generally use percussion drills or hand drills, and the drilling speed is 750 rpm.

At this point, the bolt is screwed in, the agent tube will be broken, the resin, hardener and quartz particles will be mixed, and the gap between the anchor bolt and the hole wall will be filled. At the same time, the anchor bolt can also be inserted into the wet hole, but the water must be drained out of the borehole, and the waiting time for the gelling process and the hardening process must be doubled.

5. Gel process: keep the installation tool still, and see the detailed information for the chemical reaction time.

6. Hardening process: remove the installation tools and wait for the agent to harden, and the chemical reaction time is shown in details.

7. Fix the object: After the agent is completely hardened, add a washer and a hexagon nut to fix the object.

Chemical bolts are composed of chemical hoses, screws, washers and nuts. Screws, washers, and nuts (hexagons) are generally galvanized steel and stainless steel (hot-dip galvanized as required). Chemical hoses (or plastic-wrapped pharmaceutical tubes) contain reactive resins, hardeners, and quartz particles.

This kind of chemical bolt is generally a post-embedded part, drilling holes in the concrete component to form, and using a special chemical bolt embedded glue (special silicone glue) as a binder for chemical bolts and concrete. However, this pre-embedding method should be tested for on-site pull-out force.

Standard Construction Method for Chemical Bolts:

1. Substrate drilling: drilling tools - impact electric hammer;

2. Hole clearing: 1Use compressed gas such as an air pump or gas cylinder to blow away the dust in the hole;

2.Use a brush to remove the dust attached to the inner wall of the hole;

3.Step gathering is repeated many times to remove the dust in the hole to the greatest extent;

3. Put the medicine tube: Confirm the fluidity of the resin by hand or visual inspection, and then insert the agent into the bottom of the hole after confirmation;

4. Screw-in screw: the screw is embedded in the front end with a 45° chamfering angle, and the rear end is screwed into the hexagonal nut and driven by an electric tool to screw into the bottom of the hole to stop, and confirm that there is resin rising to the vicinity of the orifice;

6. Fixed objects: objects can be fixed after the curing period;

7. Storage: Store in a cool and dry place away from light, and the storage period is 12 months.

How should chemical bolts be used, the guy fixes the bolts on the wall, and the tensile force is no worse than ordinary expansion.

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The installation method of chemical spiral is as follows: 1. Drilling: firstly, according to the design requirements, determine the position according to the spacing and margin of the drawing, and drill the liquid on the foundation.

The hole diameter and depth of the hole must meet the design requirements. 2. Clean the hole: use a pneumatic blowpipe and other tools to remove the dust and dust in the hole and keep the hole clean.

3. Insert the medicine tube: Insert the medicine tube into a clean hole, and use the hose only when the resin can flow like honey at hand temperature. 4. Drilling bolts:

Tighten the screw with an electric drill until the agent flows out. Electric drills usually use percussion drills or hand drills with a speed of 750 rpm. After the screw is tightened, the tube breaks, the resin, curing agent, and quartz particles are mixed, and the gap between the screw and the hole wall is filled.

It is also possible to insert anchor bolts into wet holes, but the shaking base must be used to draw water out of the holes and double the waiting time for the gel hardening process. 5. Gel method: keep the installation tool still.

See chemical reaction time for details. 6. Hardening process: remove the installation tool and wait for the medium to harden.

See the chemical reaction time for a detailed letter. 7. Fixing the object: After the agent is completely hardened, fix the object with a washer and a hexagonal nut.

Chemical bolts consist of chemical hoses, screws, washers, and nuts. Screws, washers, nuts (hexagonal heads) are generally galvanized steel and stainless steel (hot-dip galvanized can also be upon request). This chemical hose (or plastic-encased chemical hose) contains reactive resins, hardeners, and quartz particles.

First, the method of drilling depth: by the type and size of the anchor bolt to determine the required drilling depth, except for a few exceptions, it is generally greater than the anchorage depth. When drilling holes, the control of the drilling depth is particularly important.

If you use a drilling rig that automatically guarantees the hole depth with the corresponding manufacturer's anchor bolt (for example, the German fischer anchor bolt has a matching high-tech column cone universal drill bit FZU drilling, which is very convenient for drilling. When using, it is necessary to use an impact drill (hammer) to drill a hole of corresponding size on the fixed body, and then load the bolt and expansion pipe into the hole, and tighten the nut to make the bolt, expansion pipe, mounting piece and fixed body become one. After tightening, it will expand, the tail of the bolt has a big head, the bolt is set on a round pipe slightly larger than the diameter of the bolt, the tail part has several openings, when the bolt is tightened, the tail of the big head is brought to the open pipe, the pipe is enlarged, to achieve the purpose of expansion, and then the bolt is fixed on the ground or wall to achieve the purpose of rooting.

The thickness of the margin layer plus the thickness of the object being anchored. 2. Specifications: Chemical bolt specifications include M8, M10, M12, M16, M20, M24, M30, M33 and other specifications.

1. Drill the hole first according to the actual requirements, and the drilling diameter should be 2mm larger than the nominal diameter of the chemical base Xiaonai consumer bolt.

2. Put the chemical agent of the chemical bolt into the drilled hole.

3. Use a percussion drill to drive the bolt in, and it will be completely solidified after eight hours.