Analysis of behavior of cylindrical specimens with two pieces bonded by epoxy in concrete with different strengths and inclinations

ABSTRACT

This theoretical and experimental study aims to analyze the stress state acting at the bond joints of cylindrical specimens, mounted with concrete of different strengths (21,6 MPa, 30,0 MPa, 72,8 MPa and 86,6 MPa) with inclination of 30°, 45° and 60° and the average roughness of the concrete pieces. The roughness of each specimen was analyzed using a digital microscope. Ninety-three compressive tests were carried out, and determined the average values for stress state. For the analysis of roughness were taken seven hundred forty-four photographs distributed among the investigated concrete classes. The results are analyzed and the behavior of the stresses in the joints bonding, the correlation between the types of concrete and the average roughness of each concrete class are presented herein.

Keywords:
concrete; high strength concrete; epoxy resin; roughness; structures