Mechanical Behavior of the Interface Between Substrate and Repair Material

The paper presents the results of a study of bond tests performed to evaluate the bond strength and mechanical behavior of the interface between substrate and repair materials. Slabs made of conventional concrete were cast and cured in ambient laboratory environment; the substrate surface was roughened with jackhammers; and the repair materials were cast by shotcreting or cast by hand. Direct tensile and compression tests were performed after 2 and 6 months to evaluate the bond strength and mechanical behavior of the interface between substrate and repair materials. Paper provides test results.