Effects of restraint on expansion due to delayed ettringite formation

摘要: Delayed ettringite formation (DEF) is a chemical reaction that causes expansion in civil engineering structures. The safety level of such damaged structures has to be reassessed. To do this, the mechanical conditions acting on DEF expansions have analysed and, particular, variation strength with and effect restraint expansion. This paper highlights several points: isotropic stress-free conditions, compressive stresses decrease direction subjected lead cracks parallel restraint, measured restrained specimens not modified. Thus volumetric under anisotropic. Moreover, examines correlation between concrete damage, providing data can used for quantification induced