Experimental Design
Fresh water and a 23% brine (sodium chloride) solution were applied
at a constant rate to the surface of the HS and CS pervious
concrete slabs, respectively. A rain simulator and a Mariotte device
were used to provide a constant flow rate and even distribution on
the surface of the slabs. The slabs were subjected to varying additions
of sand (Table 2), under both frozen and thawed conditions,
with both salt and fresh water. Accordingly, there were a total of 12
quasi-independent experimental designs, with two repetitions of
each (Table 3). Note that, since the repetitions of the experiment
are conducted on the same slabs, this is not a truly independent
experimental design. It was anticipated that variations in internal
pore structure, pore volumes, etc.