Uses of prestressed steel strand:

Prestressed steel strand is often used in bridge tie, cable and external prestressing engineering, especially in the process of bridge construction, the application of steel strand is indispensable, prestressed steel strand is made up of a number of high strength steel wire stranded cable

1, prestressed concrete strand is mainly to overcome the shortcomings of low tensile strength of concrete, make full use of high strength steel. When the stress of the tensile reinforcement reaches 250 mpa and the crack width reaches 0.2-0.3 m, the durability of the component is reduced and it is not suitable for high humidity or corrosive working conditions.

2, the role of prestressed steel strand is to make members in the force before the generation of precompressive stress, reduce or offset the load caused by concrete tensile stress, so as to control the level of tensile stress of members, and even make members in a state of compression.

3, the main characteristics of prestressed steel strand is high strength and relaxation function is very good, new bridge construction, concrete structure maintenance reinforcement and reconstruction will be used.

4, prestressed steel strand can improve the use of concrete structure, effectively prevent concrete cracking, or at least can crack width, limit to the extent of harmless, improve the durability of the structure.

5, the main role is to protect the steel strand is not polluted when pouring concrete, ensure the quality of tension, tension, in the wave stranded pipe according to the requirements of grouting, so that the pipe strand and bridge consolidation, forming a whole force. To get the tension effect.

6, under the same load, the use of prestressed beam can reduce the trabecular section size version, reduce the dead weight; Because the beam is prestressed, it overcomes the problem of cracks, which is the disadvantage of using ordinary steel beams.