LABORATORY TENSILE TESTING OF UNMEASURABLE PARTS OF REINFORCING BARS JOINED BY BUTT WELDING METHOD

Abstract

The objective of the study is to test the joints of waste reinforcing bar and steel wires for tension. The tests conducted within the conditions of construction enterprises of the Republic of Kazakhstan (RK) showed that, depending on the arrangement of production and the productivity of the production of reinforced concrete products, more than 2% of reinforcing steel is wasted. The authors are developing a technology for the efficient use of the waste reinforcing bar and steel wires in the production of reinforced concrete products. This article presents the results of a laboratory test of joining reinforcing bar waste and steel wires for tension. Experimental studies were carried out on the flash butt machine MSR-25 within the conditions of the laboratory base of the Kazakhstan Institute of Welding of the Karaganda Technical University (KTU). Samples were tested in the engineering laboratory of Karaganda Technical University. As a result of the test, it was found that the rods joined from several waste reinforcing bars and steel wires by the method of flash butt welding, having 2-3 joints each, withstand a load in the range of 25000 ÷ 40000 N. The test results showed sufficient strength of the welded joints.