Application of Electroslag Welding in HRB400 Reinforced Bar
Abstract:
HRB400 Reinforced Bar is normally called New III Grade reinforced bar mainly branded 20MnSiV, which has been keenly promoted by the Ministry of Construction these years. Such grade of rebar is characteristic by high strength, good ductility and seism resistant, for which it will substitute the former II Grade rebar for predominant applications in concrete structures.
Being reliable, easy to operate and cost - efficient, the electroslag welding, is usually applied for connection between vertically loaded rebars in on - spot casting concrete structures. As per the current norm of " Procedures for Rebar Welding and Acceptance" (JGJ18 - 96), the electroslag welding can only be applied for welding of the I and II Grades. There is no stipulation for III Grade in this norm.
In order to associate with the promotion of HRB400 rebar, the research group has done a lot of analysis on the weldability of HRB400 both theoretically and experimentally based on the present application examples in Chinese metallurgical industry, which results in feasibility of electroslag welding for HRB400 rebar.
Author:
C. Xu (1), Y. Chen (2) and Y. Liu (2)
Affiiation
(1) Hunan Provincial Construction Burea
(2) Hunan Provincial Academy of Construclion Science
PDF:
Source:
Research and Application of High-Strength Reinforcing Bar - Vanitec Symposium, Hangzhou, China, Oct. 2003, pp. 106-109
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