Alkali Silica Reaction/Delayed Ettringite Formation

[1124] DEF-INDUCED ANISOTROPY AND EXPANSIVE ENERGY OF CONCRETE UNDER UNI-AXIAL RESTRAINT

Yuanxiang Dong¹, Naoshi UEDA¹, Yasuaki ISHIKAWA², Toshiaki MIZOBUCHI³ (1.関西大学 2.名城大学 3.法政大学)

Keywords:delayed ettringite formation、uni-axial restraint、anisotropic expansion、expansive energy

This study investigates the anisotropic expansion of concrete affected by Delayed Ettringite Formation (DEF) under uniaxial restraint conditions. Utilizing a device designed to impose varying levels of restraint, the research examines concrete samples with rebar ratios of 0%, 0.75%, 1.34%, and 2.10%. The anisotropic characteristics of expansive behavior was also evaluated, and the study uniquely employs expansive energy as a key metric to analyze the expansive potential, providing valuable insights into the influence of uniaxial restraint on DEF-affected concrete.