Rebar splicing technology

There are mainly 3 types of rebar splicing technologies: Reba stamping splicing technology, Taper thread splicing technology and Parallel thread splicing technology.

Reba stamping splicing technology is formed by extruding coupler to plastic deformation to connect with rebar tight.Because axial splice is inconvenient at the construction site and joint quality is not stable enough, it has not been promoted. 

Taper thread splicing technology is formed by connecting special taper thread coupler and rebar tight. The taper thread head could be prefabricated completely, and the duration of on-site connection is short, only need torque wrench to operate on-site. Without moving machine and pulling wire, it is highly praised by many construction projects. But taper thread connection is not stable enough. Because the diameter of Bottom Thread is smaller than the Base Circle Diameter of rebar, the joint strength has been weakened, and only reaches 85-95% tensile strength of parent metal.

Parallel thread splicing technology is the most popular nowadays, the joint is stable, reliable and with high connection strength. It can rival extrusion/stamping connection joint, also with the characteristic of taper thread connection joint: convenience and fast speed. So the emergence of this connection technology has brought a qualitative leap to the rebar connection technology. At present, parallel thread connection technology mainly includes two kinds: upsetting parallel connection joint and rolling parallel thread connection joint. Both technologies adopt different processing methods to enhance the strength of threaded rebar end, and reach the same strength as parent metal.