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Water 2014, 6(9), 2660-2670; doi:10.3390/w6092660

Using Drainage Slots in Permeable Paving Blocks to Delay the Effects of Clogging: Proof of Concept Study

Stormwater Research Group, School of of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4558, Australia
Received: 4 July 2014 / Revised: 22 August 2014 / Accepted: 27 August 2014 / Published: 3 September 2014
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Abstract

Permeable interlocking concrete pavements (PICP) are specifically designed to remove sediment and other pollutants from stormwater runoff. Over time, this can lead to clogging of the PICP system. Previous research has shown that much of the clogging occurs on the bedding aggregate directly below the paving joints, while the remainder of the aggregate is unaffected. This paper describes a proof of concept study to delay the effects of clogging by making more efficient use of the bedding aggregate used in PICP systems. Lateral drainage slots were cut into the underside of PICP blocks to allow sediment-laden stormwater to access, and be filtered by, a greater surface area of bedding aggregate. Eight different slot designs were trialed in the study to determine which of the slot designs made the most efficient use of the bedding aggregate to filter the sediment from the stormwater. The study results demonstrated that the eight drainage slot designs deposited between 25% and 366% more sediment (by weight) beneath the pavers than the control pavement. The results of the study suggest that PICP systems with drainage slots cast into their bases would take much longer to clog than unmodified pavers, thereby proving the concept of this study. View Full-Text
Keywords: permeable pavements; clogging; drainage slots; bedding aggregate; geofabric permeable pavements; clogging; drainage slots; bedding aggregate; geofabric
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Lucke, T. Using Drainage Slots in Permeable Paving Blocks to Delay the Effects of Clogging: Proof of Concept Study. Water 2014, 6, 2660-2670.

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