Giannini, E.R., L.F.M. Sanchez, A. Tuinukuafe, and K.J. Folliard, “Characterization of Concrete Affected by Delayed Ettringite Formation Using the Stiffness Damage Test”, Elsevier: Construction & Building Materials, Vol. 162(1) 253-264, 2018. DOI: 10.1016/j.conbuildmat.2017.12.012
The stiffness damage test (SDT) may provide more information than conventional mechanical tests used to assess concrete affected by expansive reactions. A new approach to analyzing SDT data involving the calculation of stiffness damage and plastic damage indices (SDI and PDI) has successfully characterized the expansion of concrete affected by alkali-silica reaction (ASR). This study is the first to implement SDI and PDI to characterize concrete affected by delayed ettringite formation (DEF). The SDI and PDI parameters have a nearly linear relationship to expansions under 0.40%. ANOVA confirms the statistical significance of the SDI and PDI parameters and that they provide information not available from standard elastic modulus tests.
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