Issue 64

D. Derdour et alii, Frattura ed Integrità Strutturale, 64 (2023) 31-50; DOI: 10.3221/IGF-ESIS.64.03

placed back in the container. The capillary absorption coefficient is determined by relation (2) at the following times: 0.25, 0.5, 1, 2, 4, 8 and 24 hours.



M

M

t

0



Ca

(kg/m 2 )

(2)

t

A

Ca t : capillary absorption coefficient at (t) time (kg/m 2 ). M t : Mass of specimen at (t) time (kg). M 0 : Initial mass of specimen (kg). A : Specimen section (m²).

(a) (b) Figure 12: Shrinkage device: (a) retract-meter calibration and (b) shrinkage measurement.

(a) (b) Figure 13: capillary water absorption measurement: (a) capillary water absorption test [40] and (b) capillary water absorption device.

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