JOINING BUILDING REBARS USING COUPLINGS COMPRESSED BY EXPLOSION.

Joining building rebars is a labour-consuming critical process. arc welding processes are of little use in the cases of application of heat-strengthened building rebars, or such which have a protective layer. it is shown that use of steel couplings, compressed by explosion, allows producing strong and reliable joints of building rebars for various applications. coupling parameters are calculated under the condition of equal strength with rebars steel. rupture testing revealed a higher strength of the coupling joint, compared to the strength of rebars beyond which a rupture took place. cyclic fatigue life testing showed that fatigue resistance of coupling joints is higher than that required by normative documentation. there is experience of application of explosives in large construction sites and in operating industrial facilities. [ABSTRACT FROM AUTHOR]