Experimental Study and Discussion of Results

The strength of the adhesive composition was studied experimentally with SPC beams with continuous reinforcement rods. Three series of SPC beams were tested a series of monolithic beams (I) and two series (II and III) with an adhesive joint in the middle of the span. Each series consisted of three samples. 

The beams were produced from SPC concrete of optimal composition [5]  

Beams of series I were tested to determine the load-bearing capacity on the bending moment. Beams of series II were tested to determine resistance to action of the shear forces. Both series were controls. Series III of the beams were tested to determinate the load-bearing capacity of adhesive joints of SPC adhesive joint structures. Epoxyliquid glass adhesive (composition no. 5, Table 3.11) was accepted for joint grouting. 

Beams of series 111(A) and III(B) consisted of two parts. An overlap connection of reinforcement rods in the form of a closed loop was immersed in the adhesive joint the length of the overlap is equal to 12 diameters of the working reinforcement. Such joints are widely used in plate structures. 

Working reinforcement in beams of series III(B) is welded and then covered by the adhesive composition. Such joints are used in structures operated at high temperatures. 

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