Open AccessThe effect of aggregate composition on a bond between the steel reinforcement and the normal and high-performance concrete
Author(s) -
Daniel Wałach
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/603/4/042055
Subject(s) - reinforcement , aggregate (composite) , materials science , bond strength , interlocking , ultimate tensile strength , composite material , bond , interlock , steel bar , structural engineering , compressive strength , tension (geology) , engineering , adhesive , finance , layer (electronics) , economics
This paper is focused on verification and evaluation of the influence of the coarse aggregate size used in concrete mix composition on the bond properties between ribbed steel reinforcement and concrete. The mechanism of the bond between reinforcing steel and concrete is highly dependent on the mechanical properties of the concrete, such as its tensile strength or splitting, and on the intensity of the “aggregate interlock” phenomenon, which involves the interlocking of concrete particles in the ribbed spaces of the reinforcing steel. Given this, the aggregate composition used in the production of a concrete mix can have a significant role to play in the process of transferring loads from steel to concrete and the vice versa. As a part of the study, the bond and the compressive strength of specimens made of three high-performance concretes and two normal concretes. The research has shown that the choice of the aggregate composition used in the concrete mixture, depending on the type of ribbing of the main reinforcing bars, may increase the bond strength of the reinforcement to the concrete. Due to the different properties of HPC in relation to the NC, it can be assumed that the bond mechanism runs similarly in the concrete, while the individual phases of the bond failure may occur at different intensities and with the other ranges of displacement of the bar relative to the concrete.