Uniaxial Tension Test of Slender Reinforced Early Age Concrete Members

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 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.

Tensile Mechanical Properties of Fly Ash Concrete at Early Age for Thermal Stress Analysis

“…Mimura et al [5] reported that the tensile Young's modulus based on the direct tension test by using the slender reinforced concrete (RC) specimen is higher than the compressive modulus (secant modulus) at early age. Swaddiwudhipong et al [6] also investigated tensile behavior of concrete at early age by using the direct tension test.…”

Tensile mechanical properties of fly ash concrete at early age for thermal stress analysis

“…Young's modulus in Japan is generally a secant modulus obtained from a compression test. Mimura et al [5] reported that the tensile Young's modulus based on the direct tension test by using the slender reinforced concrete (RC) specimen is higher than the compressive modulus (secant modulus) at early age. Swaddiwudhipong et al [6] also investigated tensile behavior of concrete at early age by using the direct tension test.…”

Bond behaviour of reinforcing steel bars in early age concrete

“…There is growing interest in the life-cycle analysis of concrete structures, especially for cracking analysis and construction management of RC structures during the construction period [6][7][8][9][10]. Most of these studies, however, focused on the development of http bond strength s 1 .…”