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uniaxial tension test of slender reinforced early age concrete members单轴拉伸试验的细长钢筋混凝土早期成员.pdf

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Materials 2011, 4, 1345-1359; doi:10.3390/ma4081345 OPEN ACCESS materials ISSN 1996-1944 /journal/materials Article Uniaxial Tension Test of Slender Reinforced Early Age Concrete Members Yoichi Mimura 1,*, Isamu Yoshitake 2 and Wenbo Zhang 2 1 Department of Civil and Environmental Engineering, Kure National College of Technology, Agaminami 2-2-11, Kure, Hiroshima 737-8506, Japan 2 Department of Civil and Environmental Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan; E-Mails: yositake@yamaguchi-u.ac.jp (I.Y.); n005we@yamaguchi-u.ac.jp (W.Z.) * Author to whom correspondence should be addressed; E-Mail: mimura@kure-nct.ac.jp; Tel.: +81-823-73-8476; Fax: +81-823-73-8476. Received: 21 June 2011; in revised form: 21 July 2011 / Accepted: 27 July 2011 / Published: 2 August 2011 Abstract: 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 m
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