1. Mechanical damage
Transportation or handling during friction, impact or damage caused throw throw;
Anchor installation manufacturing quality problems or cause undue damage to the force after;
Inappropriate tunnel leading to poor stress, such as plasma leakage may cause broken wires;
Tendons staggered cause undue stress and may break the wire;
Different twist to the strands connected with rotating back-twisting phenomenon caused;
Excessive force may cause broken wires (especially when poor quality anchor);
Other causes of damage;
2. Thermal damage
Fire damage on the mechanical properties;
Flame cutting droplet steel tissue damage, easily broken wire;
Welding damage, leading to partial discharge hardening, easily broken wire;
Such damage is usually due to an accident, or lack of experience caused;
3. Metallurgical damage caused by defects
Although modern smelting has been greatly improved, refining, vacuum degassing, EMS and other measures have been applied, but there is no absolute defect-free steel, with a stabilization process production rate is relatively strand defects low, because at the production stage, if there is metallurgical defects can lead to broken wires in high speed continuous drawing in or stabilization process, the broken wire strand production plants usually occurs in the middle, rarely occurs at the site of application.
4. Chemical attack
Transportation or storage of corrosion damage resulting from improper;
Thoughtful design does not lead to corrosion damage;
Construction quality caused by insufficient protection caused damage, including temporary protection and permanent protection;
Man-made chemicals cause corrosion damage;
Corrosion is a major problem leading to a reduced durability;
5. From a practical point of view to understand the situation at home and abroad, by the product itself rarely leads to a lot of breakage or regular breaks. If you see in the vicinity of the fracture heat damage, characterized by undue force, of about 45 degrees oblique fracture (see test report page 101), it can not confirm the problems caused by the material. Environmental and construction work are also important products surveyed experienced.