2.4. Designed porosity and the experimental connected porosity
The designed porosity was calculated as the void content in the
aggregate minus the pore-filling paste ratio. The void content in
the aggregate was obtained in accordance with ASTM C29.
The experimental connected porosity (P) was calculated using
Eq. (3) [32].
P ¼ 1
W4 W3
V1
100 ð3Þ
where W3 is the specimen weight in water after 24 h of soaking, W4
is the specimen weight after the specimen was removed from the water and dried to a constant weight at room temperature, and
V1 is the volume of the specimen