Table 3: The values of first-crack strength, first-crack deflection, toughness indices, and residual strength factors of bending specimens.

Specimen codeAge at test First-crack strength (kg f) First-crack deflectionToughness indicesResidual strength factor

PC228 days563.70.335
FPC2528 days4590.3334.236.849.2052.223.6
FPC2628 days3730.3133.945.948.974030.3