Permeable interlocking concrete paver lot performance quantification for short-term installation and maintenance concerns

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Concrete pavers are a popular hardscaping product as they create attractive surfaces and are long-lasting. Increasingly pavers are being used for more than just aesthetics but are design to be permeable and allow for rainwater to infiltrate into underlying soils. Permeable interlocking concrete pavers (PICP) are an on-site engineered stormwater management system. Site level stormwater management controls can mitigate flooding risks by restoring naturalized processes such as infiltration and providing distributed storage of stormwater. In order to ensure the long-term functionality of PICP there is a need to address installer related issues and to develop well defined standards and guidelines. Over time PICP losses its ability to infiltrate stormwater as surface openings gradually become clogged with sediment. Cost effective maintenance practices to rejuvenate surface infiltration capacity still need to be developed. In this project the Canada Masonry Design Centre will convert 175 sqm of existing walkways to PICP. The experimental pavement will be used to investigate the the impact of stormwater detention time for PICP on quantity control of stormwater, water quality concerns from the 'first flush' after construction as well as performance in the first winter after construction. Three detention practices will be tested: (1) free release, (2) twenty-four hour detention, (3) forty-eight hour detention. Results of this research will be integrated into draft installation and operation standards to be developed by CMDC.