Pervious concrete as a sustainable pavement material – Research findings and future prospects: A state-of-the-art review

Experimental study on Portland cement pervious concrete mechanical and hydrological properties

Clogging in permeable concrete: A review

Permeable concrete pavements: A review of environmental benefits and durability

Recycled construction and demolition materials in permeable pavement systems: geotechnical and hydraulic characteristics

Pervious concrete pavements in low-traffic urban areas such as parking lots reduce storm water runoff and also minimize water pollution. However, there are concerns about their expected clogging and consequential reduction of hydraulic performance in the long run. The pervious concrete pavements can be declogged using rejuvenation methods such as vacuum sweeping, or pressure washing, or a combination of both. This paper presents the results of our study that focused on the hydraulic performance of pervious concrete pavements. The study included field and laboratory investigations to evaluate the infiltration capacities of the pervious concrete cores and the underlying soils and the usefulness of rejuvenation methods in restoring their hydraulic performance. As a result of this research program, a new field test device, called the embedded ring infiltrometer, was developed for evaluating the infiltration rates of newly installed pervious concrete pavements. The results of this study indicate that the rejuvenation methods can substantially restore the performance of pervious concrete pavements for better management of storm water.

Effect of Rejuvenation Methods on the Infiltration Rates of Pervious Concrete Pavements

Portland cement pervious concrete’s ability to infiltrate water has encouraged its use for stormwater management However, the material has suffered historically poor acceptance due to a lack of data related to long term infiltration rates and rainfall retention which leads to an undefined credit for stormwater management Before stormwater management credit could be estimated, it was necessary to develop a testing device to gather information from existing pervious concrete parking lots currently in use Eight parking lots were examined to determine the infiltration rates of the pervious concrete, as well as to assess the soil makeup beneath pavement A total of 30 pavement cores were extracted and evaluated for infiltration rates Three of the sites had a pervious concrete section that included a gravel reservoir Infiltration rates were measured using the application of an embedded single-ring infiltrometer A mass balance model to simulate the hydrologic and hydraulic function of pervious concrete sections was developed The purpose of the model is to predict runoff and recharge volumes for different rainfall conditions and hydraulic properties of the concrete and the soil The field derived hydraulic data were used to simulate infiltration volumes and rainfall excess given a year of rainfall as used in a mass balance operated within a spreadsheet The results can be used for assessing stormwater management credit

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Hydraulic Performance Assessment of Pervious Concrete Pavements for Stormwater Management Credit

The information in this report focused on the construction and maintenance activities for Portland cement pervious concrete as used in selected sites in Florida, Georgia, and South Carolina. Construction specifications were suggested for Portland cement pervious concrete pavement in regional conditions typical to the States of Florida, Georgia, and South Carolina based on current construction practices and updated as a result of this research. Contractor certification is necessary. A total of 30 pervious concrete cores were extracted from actual operating pervious concrete sites and evaluated for infiltration rates before and after various rehabilitation techniques. The pervious concrete field sites investigated ranged in service life from 6 to 20 years and exhibited regionally similar structural integrity, infiltration rates, pavement cross sections and subsurface soils. The infiltration rates were performed at the same pressure head for comparative purposes. The techniques were pressure washing, vacuum sweeping and a combination of the two methods. For cores from pavements properly installed, it was found that the three methods of maintenance typically resulted in a 200% or greater increase over the original infiltration rates of the pervious concrete cores. However, it was noted that pressure washing may dislodge pollutants that can not be captured before entering receiving waters, thus in these situations, vacuum sweeping may be the preferred method.

Craig Ballock

Papers

Effect of Rejuvenation Methods on the Infiltration Rates of Pervious Concrete Pavements

Hydraulic Performance Assessment of Pervious Concrete Pavements for Stormwater Management Credit

Construction and Maintenance Assessment of Pervious Concrete Pavements