3.4. Comparison of the properties of pervious concrete made with 9.5-
mm versus 12.5-mm washed MSWIBA
The pervious concrete made with 9.5-mm washed MSWIBA was
used as the comparison group, and a comparison of the experimental
results between the experimental group and the comparison
group is given in this section.
The unit weights of the freshly mixed concretes in the comparison
group were lighter. The connected porosities were 24.5–30.5%
and 20.62–27.94% for the experimental and comparison groups,
respectively. The coarser MSWIBA resulted in higher connected
porosities for the same w/c ratio. There was no significant difference
between the two slurry loss rates. The highest 7-day compressive
strength values were 8.40 and 8.24 MPa for the
experimental and comparison groups, respectively, for the same
w/c ratio of 0.35. The highest 28-day split tensile strengths were
0.91 and 0.97 MPa, respectively, for the same w/c ratio of 0.35.
The bending strengths of the concretes in the comparison group
were lower than those of the concretes in the experimental group.
The permeability coefficients were 1.67–2.34 and 1.09–2.03 cm/s
for the experimental and comparison groups, respectively.
3.4. Comparison of the properties of pervious concrete made with 9.5-mm versus 12.5-mm washed MSWIBAThe pervious concrete made with 9.5-mm washed MSWIBA wasused as the comparison group, and a comparison of the experimentalresults between the experimental group and the comparisongroup is given in this section.The unit weights of the freshly mixed concretes in the comparisongroup were lighter. The connected porosities were 24.5–30.5%and 20.62–27.94% for the experimental and comparison groups,respectively. The coarser MSWIBA resulted in higher connectedporosities for the same w/c ratio. There was no significant differencebetween the two slurry loss rates. The highest 7-day compressivestrength values were 8.40 and 8.24 MPa for theexperimental and comparison groups, respectively, for the samew/c ratio of 0.35. The highest 28-day split tensile strengths were0.91 and 0.97 MPa, respectively, for the same w/c ratio of 0.35.The bending strengths of the concretes in the comparison groupwere lower than those of the concretes in the experimental group.The permeability coefficients were 1.67–2.34 and 1.09–2.03 cm/sfor the experimental and comparison groups, respectively.
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