Abstract
This paper studies a stress evaluation method for expansive concrete using moderate- or low-heat portland cement. Thermal stress reduction effect and temperature dependence of restrained expansion/ shrinkage properties of these expansive concretes were investigated by uniaxial restraint tests under various temperature conditions with prestressing steel bars or invar steel bars embedded in the specimens. Moreover, material models were created for the analysis of the properties of these expansive concretes such as expansive strain and Young’s modulus based on the relationship between restrained expansion strain and reinforcement ratio. The analysis results with these models showed that stress occurring in expansive concrete could be approximated by the recommended method quantitatively under the temperature history assumed for mass concrete.
