Pervious concrete pavement slabs (30 × 30 × 15 cm) were constructed
with an optimized mix that would provide sufficient
durability for proper field placement (Henderson 2012), following
the standard method CSA A23.2-3C [Canadian Standards
Association (CSA) 1984]. Water and salt retention in four pervious
concrete slabs were assessed in the Centre for Paving and Transportation
Technology (CPATT) lab at the University of Waterloo.
Volumetric water content of each slab was determined using Campbell
Scientific CS-605 time domain reflectometry (TDR) probes,
positioned at 5 and 15 cm from the surface of the slab. Slabs were
paired for testing (Table 1); two slabs were used for salt (as a
surrogate for chloride) characterization (herein referred to as CS
1 and CS 2) and two slabs were used to characterize the hydrologic
performance of the pervious concrete (HS 1 and HS 2).
The pore volume of each slab was determined prior