Prestressed steel strands are completely different from other steel bars, wires, steel pipes, and other materials, especially compared to steel wire. However, many people think that the properties of the two are the same. In fact, it can be said that steel wire is the main material of prestressed steel strand, and steel wire is only a material calculated in unit quantities. Generally speaking, prestressed steel strands are made by twisting multiple steel wires into one product, and then releasing their stress through a series of processing procedures to make them adapt to the working environment where mud and concrete are combined.

Prestressed steel strands must be used with mud and concrete during construction, and their stress plays a crucial role in construction. However, due to some reasons, it may affect its normal stress during storage, so it is necessary to find a suitable storage location. Due to environmental problems, the ground of some construction sites is often wet and has the characteristics of water vapor. In addition, the surface of prestressed steel strands does not have good corrosion protection, and it is easy to mildew and rust in a humid environment for a long time. Although surface rust of prestressed steel strands does not affect its normal use, if it is seriously damp, it will affect the exertion of stress and its mechanical properties. Therefore, the place for storing prestressed steel strands should be chosen in a dry and ventilated warehouse to avoid wind and rain. If the weather is fine, it can be placed in an open field, which is more convenient for outdoor operations. However, the sleepers must be erected on the ground to avoid direct contact between the prestressed steel strands and the damp ground.

With the development of China's construction industry, the use of steel strands has increased year by year. The use of steel strands not only plays an important role in the development of China's construction industry, but also has very important use value in many industrial fields in China. The quality of steel strands is increasingly attracting people's attention.

Precautions for the use of steel strands

(1) Wooden steel strands. There are two types of wooden strips used in China: ordinary wooden strips and compressed wooden strips.

(2) Steel bar or wire rope mortar steel strands. Cement mortar is used as a binder between the steel strands and the surrounding rock.

(3) Inverted wedge metal steel strands. This type of steel strand was once one of the widely used forms of steel strands. Because this type of steel strand is simple to process and easy to install, and has a certain anchoring force, it is still used within a certain range.

(4) Grooved steel strands. It is a full-length friction anchored steel strand. This type of steel strand has the characteristics of simple installation, reliable anchoring, large initial anchoring force, and long-term anchoring force increasing with the movement of the surrounding rock.

(5) Resin steel strands. Resin is used as the binder for steel strands, which is very expensive.

(6) Rapid-hardening expansive cement steel strands. It is made of ordinary Portland cement or slag Portland cement plus additives, and has the characteristics of rapid setting, early strength, water reduction, and expansion. (7) Double-quick cement steel strands. It is made by mixing finished early-strength cement and double-quick cement in a certain proportion. It has the characteristics of rapid hardening, rapid setting, and early strength.