Uniaxial Tension Test of Slender Reinforced Early Age Concrete Members

Materials

Yoichi Mimura¹  Isamu Yoshitake² 

[1] Department of Civil and Environmental Engineering, Kure National College of Technology, Agaminami 2-2-11, Kure, Hiroshima 737-8506, Japan;Department of Civil and Environmental Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan; E-Mails:

关键词: cracking;    tensile stress;    bonding;   

DOI  :  10.3390/ma4081345

来源: mdpi

【 摘 要 】

The present study aims to obtain the tensile properties of early age concrete based on a uniaxial tension test employing RC slender members. First, the paper shows that concrete strain is equal to the strain of rebar at the mid-span of the RC member. The tensile Young’s modulus and the strain capacity of early age concrete are estimated using strain measurements. The experiment indicated that the tensile Young’s modulus at an early age is higher than the compressive modulus. This observation was similar to one found in a previous investigation which used a direct tension test of early age concrete. Moreover, the paper describes how an empirical equation for mature concrete can be applied to the relation between uniaxial tensile strength and splitting tensile strength even in early age concrete. Based on a uniaxial tension test, the paper proposes an empirical equation for the relationship between standard bond stresses and relative slip.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.