Issue 60

A. Taibi et alii, Frattura ed Integrità Strutturale, 60 (2022) 416-437; DOI: 10.3221/IGF-ESIS.60.29

simulations show quite similar results. However, local behaviour shows a noticeable difference. Fig. 10 shows damage and crack opening evolution of early age concrete and concrete without early age under traction loading. Crack openings have been estimated using the post-processing method exposed above (Matallah and al [25]). A more significant damage density is witnessed on early age concrete. Regarding crack opening values, concrete with initial early age state shows higher crack openings. Cracks propagate in the matrix perpendicular to the loading directions.

1,6

1,4

1,2

1

0,8

Without Early Age With Early Age

0,6

Stress (MPa)

0,4

0,2

0

0

0,05

0,1

0,15

0,2

0,25

0,3

0,35

Displacement (mm)

Figure 9: Global mechanical behaviour of early age concrete under tensile loading. With Early Age Without Early Age

Damage

Damage

Crack Openings Crack Openings Figure 10: Damage and crack openings due to early age under traction

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