IZQUIERDO, ORIETA SOTO1; CORRÊA, MÁRCIO ROBERTO SILVA2;

1) PhD Student, EESC РUniversity of Ṣo Paulo, Department of Structural Engineering, orieta@sc.usp.br

2) PhD, Associate Professor, EESC РUniversity of Ṣo Paulo, Department of Structural Engineering, mcorrea@sc.usp.br

The bond between block and grout may contribute to the structural behavior of composite masonry. The transfer of stress depends on the interaction between these materials. This work aims to study the behavior of the block/grout interface for concrete block masonry. This was achieved by means of experimental tests of push-out specimens and pull-out specimens with the presence of reinforcement bars to study the interface. All materials used in the tests complied with the standard requirements. The experimental results showed that there is a good bond between the concrete blocks internal faces and the grout, enough to prevent grout slippage, and that the whole tensile strength of the reinforcement bars is achieved provided they are properly anchored.

Keywords: Block/grout interface. Bond Stress. Compressive strength. Bond strength. Grouting. Reinforced masonry.