A wide range of values of the water–cement ratio (also known
as the w/c ratio) and the pore filling paste ratio was used to fabricate
pervious concrete samples for testing. Cylinders measuring
150 mm in diameter and 300 mm in length were fabricated as test
specimens. The pervious concrete mix design was based on the results
of vertical flow tests, permeability tests, and tests of compressive
strength, split tensile strength, and bending strength of the
concrete after hardening. Based on the test results, the experimental mix proportions of the concrete specimens (shown in Table 2)
were determined. The mix proportions of the concrete mixes with
the best test results were selected (w/c ratios of 0.35, 0.40 and 0.45
and pore filling ratios of 60%), and a natural aggregate with the
same maximum aggregate size as the control aggregate as well
as a washed MSWIBA with a maximum aggregate size of 9.5 mm
(the comparison group, representing the second most abundant
particle size in washed MSWIBA) were used. The same tests were
then performed to investigate the differences in the properties of
the concretes made using washed MSWIBA and natural aggregate
in order to assess the effects that the use of washed MSWIBA with
a smaller dimension has on the properties of pervious concrete.
The test methods used are described below