Permeability coefficient. The permeability coefficient values
after a 28-day moist curing period are shown in Fig. 7. For specimens
with the same w/c ratio, the permeability coefficient decreased as the pore-filling paste ratio increased. The concrete
with a 0.30 w/c ratio and a 40% filling ratio had the highest value,
at 4.11 cm/s. The permeability ratios of all of the mixes met the
requirement of being at least 1 102 cm/s for pedestrian pavement
in Taiwan.