Chemical anchor standard, the difference between national standard chemical anchor bolt and non stan

The grade indicates the material of the screw. Such as level, level. For example, the inverted conical shaped chemical anchor bolt of Nanjing Mancartel, the tensile force of grade M12 is 68 kN, but the average brand is only 20 kN!

Because the special MT500 planting reinforcement glue equipped by Nanjing Mancartel is a grade A glue, the screw of the glue pulling M30 is screw yielding. It has passed the fire protection certification, underwater application certification, anti-aging 50 years certification, and safety appraisal certification! It has been widely used in key projects including Shanghai Disneyland and Harbin Metro!

Among the mechanical anchor bolt manufacturers, it is also better to belong to Nanjing Mancart. Contact Mancartel 4oo 894 5118 Nanjing Mancatel's mechanical anchors have passed the seismic resistance, fatigue resistance certification and fire protection certification. Take 12 as an example, the rally reaches more than 60 thousand N!

It has been widely used in Nanjing Metro, Shenzhen Metro, Marriott Hotel, etc

Chemical anchor bolt is a substitute for expansion bolts, there is no relevant national standard on the material, the matrix is structural steel, and the colloid looks different from each manufacturer, but it is all researched by the manufacturer itself, and it is useless for individuals to understand, and his formula will not be fully announced.

Chemical anchor bolt is a new type of fastening material, which is composed of chemical agents and metal rod body. It can be used for the installation of embedded parts in the construction of various curtain walls and marble dry hanging, and can also be used for equipment installation, highway and bridge guardrail installation; Building reinforcement and renovation and other occasions. Because the chemical reagents contained in the glass tube are flammable and explosive, the manufacturer must be approved by the relevant state departments before production, and the entire production process needs to have strict safety measures, and use an assembly line that is completely isolated from the staff.

If it is done manually, it not only violates the relevant regulations of the state, but also is very dangerous.

Chemical anchor bolt is a new type of anchor bolt that appears after the expansion anchor bolt, is the composite part that the screw is cemented and fixed in the concrete substrate borehole by a special chemical adhesive, so as to realize the anchorage of the fixing.

There are three types of chemical anchors, namely high-strength chemical anchors, inverted conical anchors and shaped anchors. Although there is no relevant specification to limit their specifications and models, the industry has basically determined the distinction between national standards and non-standards. The national standard models of the three chemical anchors are basically the same, and their specifications and models are as follows:

What are the specifications and models of chemical anchors? The vast majority of these manufacturers do not produce M8 inverted conical anchors and shaped anchors, of course, the amount of chemical anchors in M8 specifications is very small. Customization of non-standard chemical anchor bolts 1) Increase the length of screw leakage This scheme is caused by the thickness of the anchorage, and such a scheme is recognized when the pure basic performance of the anchor bolt itself is satisfied.

The elongated chemical anchor needs to be specially customized, and the processing cycle is much longer than the conventional model, and the quantity is moderate (more than 10,000) in order to be better, such as pants Zen and chemical anchor manufacturers to talk about ** and follow-up services. What are the specifications and models of chemical anchors? 2) Increase the buried depth to the level M12 chemical anchor bolt as an example, the national standard buried depth is 110mm, and the pull-out test result on C30 concrete is the anchor bolt breakage, then it shows that the buried depth of 110mm can fully play the ultimate mechanical properties of the anchor bolt material (35 steel), and the buried depth has no practical significance, and even increases the difficulty of construction.

Designer's misunderstanding: do not understand the limit of the bearing capacity of the anchor bolt, blindly increasing the length of the anchor bolt will only bring greater difficulty to the construction, but also increase the cost of the project. Taking the M24 chemical anchor bolt as an example, the national standard burial depth is 210mm, and the pull-out test result of the chemical hose construction on C30 concrete is the failure of the concrete rubber surface.

However, if the original mechanical properties can already meet the needs of the project, the increased mechanical properties are not very useful, and it is difficult to find manufacturers on the market who are willing to make long-sized chemical tubes, so it is difficult to carry out the project. Therefore, we can only take another solution, which is to cooperate with the construction of injection planting reinforcement glue, and the standard buried depth can break the screw after the colloid is fully functional, which is the simplest improvement method. To put it simply, there is no need to increase the burial depth of small-sized (M16 and below) chemical anchors, and forcibly increasing them will only increase the cost and workload.

1. According to the requirements of engineering design, drill holes in the corresponding position in the base material (such as concrete), and the hole diameter, hole depth and bolt diameter should be determined by professional technicians or field tests.

2. Use percussion drill or rhinestone to drill holes.

3. Use a special air cylinder, brush or compressed air machine to clean the dust in the borehole, and it is recommended to repeat it no less than 3 times, and there should be no dust and water in the hole.

4. Ensure that the surface of the bolt is clean, dry and oil-free.

5. Confirm that the glass tube anchor package has no abnormal phenomena such as appearance damage and coagulation, and put its round head inward into the anchoring hole and push it to the bottom of the hole.

6. Use an electric drill and a special installation fixture to rotate the screw and insert it until the bottom of the hole, and the impact method should not be used.

7. When it is screwed to the bottom of the hole or the marked position on the bolt, stop the rotation immediately, remove the installation fixture, and avoid disturbance after gelling until it is completely cured. Overtime rotation leads to glue loss, affecting anchorage. (The rotation time should not exceed 30 seconds, the rotation speed should not be less than 300 rpm, not more than 750 rpm, the bolt advance speed is about 2cm seconds, and the impact mode is not allowed.) ）