3.3. Comparison of the properties of pervious concrete made with 12.5-
mm washed MSWIBA versus pervious concrete made with a natural
aggregate
A comparison of pervious concrete samples made with 12.5-
mm washed MSWIBA (the experimental group) and pervious concrete
samples made with 12.5-mm natural aggregate (the control
group) is described in this section.
The unit weights of the freshly mixed concretes in the experimental
group were lighter. The connected porosities were 24.5–
30.5% and 25.9–27.2% for the experimental and control groups,
respectively, although the differences were not significant. The
slurry weight loss rate of the experimental group was higher than
that of the control group. The highest 28-day compressive strength
values were 9.59 and 9.12 MPa for the experimental and control
groups, respectively, for the same w/c ratio of 0.35. The highest
28-day split tensile strengths were 0.91 and 1.06 MPa, respectively,
for the same w/c ratio of 0.35. The bending strengths of
the concretes in the experimental group were higher. The permeability coefficients were 1.67–2.34 and 2.49–2.89 cm/s for the
experimental and control groups, respectively.
3.3. Comparison of the properties of pervious concrete made with 12.5-mm washed MSWIBA versus pervious concrete made with a naturalaggregateA comparison of pervious concrete samples made with 12.5-mm washed MSWIBA (the experimental group) and pervious concretesamples made with 12.5-mm natural aggregate (the controlgroup) is described in this section.The unit weights of the freshly mixed concretes in the experimentalgroup were lighter. The connected porosities were 24.5–30.5% and 25.9–27.2% for the experimental and control groups,respectively, although the differences were not significant. Theslurry weight loss rate of the experimental group was higher thanthat of the control group. The highest 28-day compressive strengthvalues were 9.59 and 9.12 MPa for the experimental and controlgroups, respectively, for the same w/c ratio of 0.35. The highest28-day split tensile strengths were 0.91 and 1.06 MPa, respectively,for the same w/c ratio of 0.35. The bending strengths ofthe concretes in the experimental group were higher. The permeability coefficients were 1.67–2.34 and 2.49–2.89 cm/s for theexperimental and control groups, respectively.
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